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Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
Product code:69503
DNA / RNA Extraction Kit
MORA- EXTRACT
Instruction Manual
Table of Contents 1. Kit contents 1 2. Purpose of use 1 3. Reagents and equipment necessary for operation 1 4. Basic operations 2 5. Basic operations flow 3 6. Protocols for Nucleic Acids Extraction by samples 4
A) DNA/RNA extraction of microorganism from feces samples 4 A-1) DNA/RNA extraction of bacteria from watery diarrhea 4 A-2) DNA/RNA extraction of bacteria from normal feces 6 A-3) Viral RNA Extraction from diarrheal stool 8
B) Pathogenic DNA/RNA derived from sputum or pharyngeal scrap samples 10 B-1) Extraction of bacteria or mold DNA/RNA from sputum 10 B-2) Extraction of viral RNA from sputum 11 B-3) Extraction of bacterial or viral DNA/RNA from pharyngeal scrap samples 13 B-4) Extraction of bacterial or viral DNA/RNA from specimen after gargle 14
C) Extract of pathogenic DNA/RNA from blood samples 15 C-1) Extract of pathogenic DNA/RNA from whole blood samples 15 C-2) Extraction of viral DNA/RNA from serum samples 16
D) Extraction of pathogenic DNA/RNA from colony or culture medium 18 D-1) Extraction of bacteria or mold DNA/RNA in culture bottle with small numbers of fungi 18 D-2) Extract of pathogenic DNA/RNA from colony or culture medium 19
E) Extraction of pathogenic DNA/RNA from urinary samples 20 E-1) Extraction of bacterial or viral DNA/RNA from secretion of urethra 20 E-2) Extraction of bacterial or viral DNA/RNA from first catch urine 22
F) Extraction of pathogenic DNA/RNA from food materials 23 F-1) Liquid (not containing solid matter such as fruits juice) 23 F-2) Semi-Fluid ( such as Mild or Ice Cream) 23 F-3) Solid (Meat etc.) 23 F-4) Marine products (Raw Oyster etc.) 23
G) Extraction of pathogenic DNA/RNA from for trace amount of samples 25 H) Extraction of bacterial DNA/RNA from Environmental Water 26
H-1) Extraction of bacterial DNA/RNA from environmental water heavily polluted (centrifugal concentration) 26 (Water collected from bath, liver or cool tower) H-2) Extraction of DNA/RNA from Clean Water (filtration enrichment) 27 (Methods for test of trace amount of bacterial contamination of Samples from Tap Water of Distilled Water)
I) Extraction of DNA/RNA from soil compost 28 7. Usage in gene amplification of extracted DNA by PCR 32 8. Precautions for use and handling 33 9. Storage 34 10. Shelf life 34
Research Use Only
Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
1
1: Kit contents (for 50 times) 1) Lysis buffer (non-medical deleterious substance *) 10 mL × 1 bottle
(containing 0.72% of 2-mercaptoethanol) 2) Tube containing beads 50 tubes 3) SDS solution+ 10 mL × 1 bottle 4) Phenol mixture (non-medical deleterious substance *) 20 mL × 1 bottle
(containing 42% of phenol) 5) DEPC-treated water (for dissolving purified nucleic acid) 10 mL × 1 bottle 6) 2-mL tube for laboratory 50 tubes 7) Paper stand for laboratory 1 unit 8) Instruction 1 set * Description based on Japanese legal regulations.
2: Purpose of use Nucleic acid (DNA/RNA) extraction from microorganisms (This kit was developed in order to easily extract and purify nucleic acids of pathogen, etc. included in various samples from them as a prior step of gene amplification. Especially, it has excellence performance for trace amount of specimens.)
3: Reagents and equipment necessary for operation [Reagents/supplies] 1) 99% Ethanol 2) 70% Ethanol (mixture of 99% ethanol and DEPC-treated water or sterile distilled water in the ratio of 7 to 3) 3) Sterile 2-mL microtube 4) Sterile tip (for 1,000 μL and 200 μL; Filter tips are recommended) 5) RNase-free 10 mM Tris – 1mM EDTA pH 8.0 or pH 7.6 (TE buffer) (for storage of extracted DNA/RNA) [Equipment] 1) Water bath or heat block (Heat to 70°C [or 90°C as necessary] before starting operation. Use a heat block for 90°C.)
2) Homogenizer (The following device is recommended.) Disruptor Genie (Scientific Industries; M&S Instruments Inc.)
3) Micropipette (for 200 – 1,000 μL, for 20 – 200 μL, and for 2 – 20 μL) 4) Mixer (Vortex) 5) High speed micro-centrifuge 6) Ultraviolet-visible Spectrophotometer (for quantification of extracted DNA/RNA) 7) Tabletop-type mini centrifuge (to drop liquid on sidewalls or back of a lid)
Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
2
4: Basic operations In case of a sample from clinical specimens, foods, or environment, it should be pretreated by such as suspension, homogenization, precipitation, or concentration separately for each sample. The basic operations after such pretreatment are as follows. 1) Take the bacteria solution, which is prepared by suspending bacterial culture or cells in such as saline, or the pretreated sample
into a sterilized 2-mL microtube, and centrifuge it at 15,000 rpm (or not less than 12,000 ×G) for 3 to 5 minutes. Extend to 15 to 20 minutes when a precipitation enhancer is necessary.
2) After centrifugation, discard the supernatant to obtain precipitate or liquid, add 150 μL of lysis buffer to it, and mix well to suspend. (If any precipitate generates in the lysis buffer, dissolve the precipitate by allowing it to warm to room temperature before use.)
3) Transfer the suspension into the tube containing beads, heat at 70 to 90°C*1 for 10 minutes to facilitate bacteriolysis. *1: In case of extraction of RNA, treat at 70°C. Although DNA usually can be extracted at 70°C, the disruption efficiency for
gram-positive bacteria will improve in treatment at 90°C. 4) After heating treatment, disrupt for 2 minutes with Disruptor Genie (Scientific Industries).
In case a homogenizer is not available, DNA/RNA extraction also can be achieved by treatment with Vortex for 2 minutes*2. *2: The disruption conditions other than those mentioned above may damage the tube containing beads. Especially, vigorous shaking should be avoided in the device dedicated for cell-disruption with beads.
5) After disruption, drop the liquid on the lid by flushing of the centrifuge or with a tabletop-type mini centrifuge, add 200 μL of
SDS solution+, mix it, and heat again at 70°C for 10 minutes. (If any precipitate generates in the SDS solution+, dissolve the precipitate by allowing it to warm to room temperature before use.)
6) Add 400 μL of phenol mixture*3, mix it, centrifuge at 15,000 rpm for 3 minutes, collect the upper layer*4 into the attached
2-mL tube for laboratory (crude nucleic acid purified) *3: Take only the yellow liquid in the lower layer not to take the transparent liquid in the upper layer. *4: Take only the transparent liquid in the upper layer to prevent contamination with the yellow phenol layer and the denatured middle layer (white).
7) Add 1 mL of 99% ethanol to the crude nucleic acid purified (use of a commercially available coprecipitation agent is
recommended in case of less microbial count or for beginners), mix it, and centrifuge at 15,000 rpm for 3 minutes. Discard the supernatant*5, add about 1 mL of 70% ethanol, mix it, and centrifuge at 15,000 rpm for 3 minutes again. Then discard the supernatant, and dry the precipitate. Purification with magnetic beads followed by washing is also useful instead of centrifugation. *5: Remove the supernatant completely so that the components of the lysis buffer do not remain.
8) Add 200 μL of DEPC-treated water (for immediate use) or TE buffer (for storage) to the dried precipitate, and dissolve it
(purified nucleic acid). The basic operations flow is shown in the following page. Also refer to the protocol for each specimen as the appropriate liquid volume in the pretreatment or the basic operations may change depend on the specimen type.
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Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
4
6. Protocols for Nucleic Acids Extraction by samples A) DNA / RNA extraction of microorganism from feces samples A-1) DNA / RNA extraction of bacteria from watery diarrhea
Pre-treatment of watery diarrhea Collect 0.5-1g of watery diarrhea and mix well with 4.5-9 mL of PBS (or saline). *This operation enables to move sample suspension safely to 2mL tube and improve recovery by homogenizing diarrhea solution. Preparation of watery diarrhea samples 1. Transfer 2mL of watery diarrhea suspension to experimental tube (2mL capacity), treat with high speed microcentrifuge at 15000rpm / 3min and discard supernatant. Add 150μL of lysis buffer to remaining precipitate and mix well. Whole suspension is transferred to tube containing beads. *As lysis buffer may precipitate in low temperature, it is recommended to reconstitute at room temperature before use and dissolve precipitate if any. 2. Heat the suspension at 70℃ / 10min and enhance bacteriolysis. *In case extracting RNA, optimum temperature is 70℃. For DNA extraction, generally possible at 70℃ but if samples are derived from gram-positive bacteria, recommend temperature is 90℃ to improve disruption efficiency. Almost all of asporogenic pathogens are perished by this operation. 3. Close the lid of tube tightly, disrupt samples with appropriate device (Disrupter Genie : Scientific Industries) Even disruption device is not available, it is possible to extract DNA / RNA by treatment with Vortex at 2 min. 4. After disruption process, add 200μL of SDS solution and enhance bacteriolysis at 70℃ / 10min. 5. Add 400μL of phenol mixture and shake on the mixer at 1min (or centrifuge at 15000rpm / 3min after treatment with Vortex). Collect supernatant as crude DNA solution Purification of DNA/RNA Purification is operated with Ethanol precipitation method or magnetic beads collection method Purification with Ethanol Precipitation Method 1. Transfer 200μL of crude DNA solution to microcentrifuge tube (sterilized, 2mL capacity), add 1000μL of 99% Ethanol and mix with vortex. After treatment, centrifuge at 15000rpm / 3min and discard the supernatant 2. Add 1000μL of 70% Ethanol and centrifuge at 15000rpm / 3min. After this process, discard remaining supernatant alcohol sucking with micropipette (Please be careful not to suck in precipitate containing DNA/RNA). *In case preparing self-made 70% Ethanol, add DEPC treated water to 99 % Ethanol and adjust 70% at w/v. 3. Add 200μL of DEPC treated water to and suspend the precipitate.
Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
5
**Option : If concentration of DNA is too high, it may cause suppression of RNA or DNA amplification reaction. Record absorption value using NanoDrop at 260nm, 260nm/280nm, 260nm/230nm and choose appropriate amount for next step of gene amplification process.
Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
6
A-2) DNA/RNA extraction of bacteria from normal feces
Pre-treatment of normal feces Collect 1g of feces sample and suspend well with 9mL of PBS or saline. Leave to stand for 1-3 min and collect 2mL of supernatant as sample for bacteria test (this operation enables to homogenize feces samples and improve recovery of test except large scale of food test. Sample preparation of normal feces 1. Transfer 2mL of feces suspension to experimental tube (2mL capacity), treat with high speed microcentrifuge at 15000rpm / 3min and discard the supernatant. 2. Add 150μL of lysis buffer to remaining precipitate and mix well. Whole suspension is transferred to the tube containing beads. 3. Enhance bacteriolysis by heating at 70-90℃/ 10min * In case extracting RNA, optimum temperature is 70℃. For DNA extraction, generally possible at 70℃ but if samples are derived from gram-positive bacteria, recommend temperature is 90℃ to improve disruption efficiency. Almost all of asporogenic pathogens are perished by this operation. 4. Close lid of tube tightly, disrupt samples with appropriate device (Disrupter Genie : Scientific Industries) Even disruption device is not available, it is possible to extract DNA/RNA by treatment with Vortex at 2 min. 5. After the process of disruption, add 200μL of SDS solution+ and enhance bacteriolysis at 70℃ / 10min. 6. Add 400μL of phenol mixture and shake on the mixer at 1min (or centrifuge at 15000rpm / 3min after treatment with Vortex). Collect supernatant as crude DNA solution. Purification of DNA/RNA Purification is operated with Ethanol precipitation method or magnetic beads collection method Purification with Ethanol Precipitation Method 1. Transfer 200μL of crude DNA solution to microcentrifuge tube (sterilized, 2mL capacity), add 1000μL of 99% Ethanol and mix with vortex. After treatment, centrifuge at 15000rpm / 3min and discard the supernatant 2. Add 1000μL of 70% Ethanol and centrifuge at 15000rpm / 3min. After this process, discard remaining supernatant alcohol sucking with micropipette (Please be careful not to suck in precipitate containing DNA/RNA). *In case preparing self-made 70% Ethanol, add DEPC treated water to 99 % Ethanol and adjust 70% at w/v. 3. Add 200μL of DEPC treated water to and suspend the precipitate.
Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
7
**Option : If concentration of DNA is too high, it may cause suppression of RNA or DNA amplification reaction. Record absorption value using NanoDrop at 260nm, 260nm/280nm, 260nm/230nm and choose appropriate amount for next step of gene amplification process.
Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
8
A-3) Viral RNA Extraction from diarrheal stool
Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
9
Pre-treatment of diarrheal stool samples 1. Collect 0.5-1g of diarrheal stool and suspend well with 4.5-9mL of PBS or (or saline). Leave to stand for a while and collect 1mL of supernatant as sample for viral RNA test (this operation enables to homogenize feces samples and improve recovery). It is possible to apply 2mL of remaining aliquot to bacteria test. 2. For the test of RNA virus, transfer 1mL of the supernatant to experimental tube (2mL capacity), add same volume of precipitation enhancer and chilled with ice staying 90℃ or leave at 4℃ / overnight. 3. Centrifuge at 15000rpm / 20min / 4℃ and discard the supernatant. Preparation of diarrheal stool samples 4. Add 200μL of lysis buffer and suspend. Transfer whole suspension to tube containing beads and add 200μL of SDS solution+. Mix well and stay at 70℃ / 10min. 5. Add 400μL of phenol mixture and shake on the mixer at 1min (or centrifuge at 15000rpm / 3min after treatment with Vortex). Collect the supernatant as crude RNA solution. Purification of DNA/RNA Purification is operated with Ethanol precipitation method or magnetic beads collection method Purification with Ethanol Precipitation Method 1. Transfer 200μL of crude DNA solution to microcentrifuge tube (sterilized, 2mL capacity), add 1000μL of 99% Ethanol and mix with vortex. After treatment, centrifuge at 15000rpm / 3min and discard the supernatant 2. Add 1000μL of 70% Ethanol and centrifuge at 15000rpm / 3min. After this process, discard remaining supernatant alcohol sucking with micropipette (Please be careful not to suck in precipitate containing DNA/RNA). *In case preparing self-made 70% Ethanol, add DEPC treated water to 99 % Ethanol and adjust 70% at w/v. 3. Add 200μL of DEPC treated water to and suspend the precipitate. **Option : If concentration of DNA is too high, it may cause suppression of RNA or DNA amplification reaction. Record absorption value using NanoDrop at 260nm, 260nm/280nm, 260nm/230nm and choose appropriate amount for next step of gene amplification process.
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Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
11
B-2) Extraction of viral RNA from sputum
Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
12
Pre-treatment of Sputum 1. Collect 1mL of with sampling tube (14mL capacity) and add 3×volume of Sputazyme (Kyokuto). Mix well, incubate at 15min / Room temperature and use 200μL for virus test. Preparation of Sputum samples 2. Pre-treated sputum sample is transferred to beads packed tube. Add 200μL of lysis buffer and 200μL of SDS solution+ and heat at 70℃ / 15min. 3. Add 400μL of phenol mixture, shake 1min with mixer or Vortex. 4. Centrifuge at 15000rpm/5min and collect 200μL of the supernatant as crude DNA/RNA solution. Purification of DNA/RNA Purification is operated with Ethanol precipitation method or magnetic beads collection method Purification with Ethanol Precipitation Method 5. Transfer 200μL of crude DNA solution to microcentrifuge tube (sterilized, 2mL capacity), add 1000μL of 99% Ethanol and mix with vortex. After treatment, centrifuge at 15000rpm / 3min and discard the supernatant 6. Add 1000μL of 70% Ethanol and centrifuge at 15000rpm / 3min. After this process, discard remaining supernatant alcohol sucking with micropipette (Please be careful not to suck in precipitate containing DNA/RNA). *In case preparing self-made 70% Ethanol, add DEPC treated water to 99 % Ethanol and adjust 70% at w/v. 7. Add 200μL of DEPC treated water to and suspend the precipitate. **Option : If concentration of DNA is too high, it may cause suppression of RNA or DNA amplification reaction. Record absorption value using NanoDrop at 260nm, 260nm/280nm, 260nm/230nm and choose appropriate amount for next step of gene amplification process.
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Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
16
C-2) Extraction of viral DNA/RNA from serum samples
1. Transfer 200μL of serum to beads packed tube, mix well adding 200μL of lysis buffer and 200μL of SDS solution+ 2. Heat at 70℃ / 10min, add 400μL of phenol solution and shake 1min with mixer or vortex. 3. Treat with high speed microcentrifuge at 15000rpm / 3min and collect the supernatant as crude DNA/RNA solution. Purification of DNA/RNA Purification is operated with Ethanol precipitation method or magnetic beads collection method Purification with Ethanol Precipitation Method 1. Transfer 200μL of crude DNA solution to microcentrifuge tube (sterilized, 2mL capacity), add 1000μL of 99% Ethanol and mix with vortex. After treatment, centrifuge at 15000rpm / 3min and discard the supernatant 2. Add 1000μL of 70% Ethanol and centrifuge at 15000rpm / 3min. After this process, discard remaining supernatant alcohol sucking with micropipette (Please be careful not to suck in precipitate containing DNA/RNA). *In case preparing self-made 70% Ethanol, add DEPC treated water to 99 % Ethanol and adjust 70% at w/v. 3. Add 200μL of DEPC treated water to and suspend the precipitate.
Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
17
**Option : If concentration of DNA is too high, it may cause suppression of RNA or DNA amplification reaction. Record absorption value using NanoDrop at 260nm, 260nm/280nm, 260nm/230nm and choose appropriate amount for next step of gene amplification process.
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Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
20
E) Extraction of pathogenic DNA / RNA from urinary samples E-1) Extraction of bacterial or viral DNA/RNA from secretion of urethra
Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
21
1. Collect materials with cotton swab and transfer to micro centrifuge tube containing 200μL of sterilized Distilled Water. Wring the cotton well to suspend materials sticking to it. 2. Transfer whole suspension to tube containing beads, add 200μL lysis buffer and mix well. 3. Enhance bacteriolysis by heating at 70-90℃ / 10min.
*In case extracting RNA, optimum temperature is 70℃. For DNA extraction, generally possible at 70℃ but if samples are derived from gram-positive bacteria, recommend temperature is 90℃ to improve disruption efficiency. Almost all of asporogenic pathogens are perished by this operation. 3 SDS is not required.
4. Add 400μL of phenol mixture and shake on the mixer at 1min (or centrifuge at 15000rpm / 3min after treatment with Vortex). Collect supernatant as crude DNA solution. Purification of DNA/RNA Purification is operated with Ethanol precipitation method or magnetic beads collection method Purification with Ethanol Precipitation Method 1. Transfer 200μL of crude DNA solution to microcentrifuge tube (sterilized, 2ml capacity), add 1000μL of 99% Ethanol and mix with vortex. After treatment, centrifuge at 15000rpm / 3min and discard the supernatant 2. Add 1000μL of 70% Ethanol and centrifuge at 15000rpm / 3min. After this process, discard remaining supernatant alcohol sucking with micropipette (Please be careful not to suck in precipitate containing DNA/RNA). *In case preparing self-made 70% Ethanol, add DEPC treated water to 99 % Ethanol and adjust 70% at w/v. 3. Add 200μL of DEPC treated water to and suspend the precipitate. **Option : If concentration of DNA is too high, it may cause suppression of RNA or DNA amplification reaction. Record absorption value using NanoDrop at 260nm, 260nm/280nm, 260nm/230nm and choose appropriate amount for next step of gene amplification process.
Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
22
E-2) Extraction of bacterial or viral DNA/RNA from first catch urine 1. Collect 2ml of urine and transfer to experimental tube (2mL capacity). Centrifuge at 15000rpm Room temperature / 3min and discard the supernatant. 2. Add 150μL of lysis buffer to remaining precipitate, mix well with pipette and transfer to tube containing beads. * Lysis buffer may precipitate under environment of low temperature. In such case, reconstitute it at room temperature to dissolve precipitate. 3. Enhance bacteriolysis staying at 70-90,℃ / 10min.
*In case extracting RNA, optimum temperature is 70℃. For DNA extraction, generally possible at 70℃ but if samples are derived from gram-positive bacteria, recommend temperature is 90℃ to improve disruption efficiency. Almost all of asporogenic pathogens are perished by this operation.
4. Close lid of the tube tightly, disrupt samples with appropriate device (Disrupter Genie : Scientific Industries). Even disruption device is not available, it is possible to extract DNA/RNA by treatment with Vortex at 2 min. 5. After the process of disruption, add 200μL of SDS solution+ and enhance bacteriolysis at 70℃ / 10min. 6. Add 400μL of phenol mixture and shake on the mixer at 1min (or centrifuge at 15000rpm / 3min after treatment with Vortex). Collect supernatant as crude DNA solution. Purification of DNA/RNA Purification is operated with Ethanol precipitation method or magnetic beads collection method Purification with Ethanol Precipitation Method 1. Transfer 200μL of crude DNA solution to microcentrifuge tube (sterilized, 2mL capacity), add 1000μL of 99% Ethanol and mix with vortex. After treatment, centrifuge at 15000rpm / 3min and discard the supernatant 2. Add 1000μL of 70% Ethanol and centrifuge at 15000rpm / 3min. After this process, discard remaining supernatant alcohol sucking with micropipette (Please be careful not to suck in precipitate containing DNA/RNA). *In case preparing self-made 70% Ethanol, add DEPC treated water to 99 % Ethanol and adjust 70% at w/v. 3. Add 200μL of DEPC treated water to and suspend the precipitate. **Option : If concentration of DNA is too high, it may cause suppression of RNA or DNA amplification reaction. Record absorption value using NanoDrop at 260nm, 260nm/280nm, 260nm/230nm and choose appropriate amount for next step of gene amplification process.
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Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
24
Purification with Ethanol Precipitation Method 1. Transfer 200μL of crude DNA solution to microcentrifuge tube (sterilized, 2ml capacity), add 1000μL of 99% Ethanol and mix with vortex. After treatment, centrifuge at 15000rpm / 3min and discard the supernatant 2. Add 1000μL of 70% Ethanol and centrifuge at 15000rpm / 3min. After this process, discard remaining supernatant alcohol sucking with micropipette (Please be careful not to suck in precipitate containing DNA/RNA). *In case preparing self-made 70% Ethanol, add DEPC treated water to 99 % Ethanol and adjust 70% at w/v. 3. Add 200μL of DEPC treated water to and suspend the precipitate. **Option : If concentration of DNA is too high, it may cause suppression of RNA or DNA amplification reaction. Record absorption value using NanoDrop at 260nm, 260nm/280nm, 260nm/230nm and choose appropriate amount for next step of gene amplification process.
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Advanced Microorganism Research #69503KH01
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28
I) Extraction of DNA/RNA from soil compost Compositions of microflora in soil are differs by environment. Numbers of bacteria are various spanning from levels of 103 to 109.
Pre-treatment
Transfer 4g of soil sample to falcon tube (50mL capacity), add 35mL of buffer (125mM NaCl, 50mM EDTA, pH8.0) and 1mL of 20% skim milk. Suspend soil mixture with Vortex. (This treatment enables to remove inhibitory substance for PCR absorbed to Silica or DNA homogenizing samples). After nixing, stay at 5-10min until supernatant of upper phase becomes clear. If this interval is to short, there may be a case process of phenol extraction may be operated more than twice.
Preparation of Soil Samples 1. Transfer 2mL of soil suspension to experimental tube, centrifuge at 15000rpm / 5min and discard the supernatant. Add more
2mL of same sample and repeat once more. After discarding the supernatant, add 150μL of lysis buffer, mix well and transfer whole suspension to tube containing beads.
2. Enhance bacteriolysis staying at 70-90℃ / 10min *In case extracting RNA, optimum temperature is 70℃. For DNA extraction, generally possible at 70℃ but if samples are
derived from gram-positive bacteria, recommend temperature is 90℃ to improve disruption efficiency. Almost all of asporogenic pathogens are perished by this operation.
3. Close lid of the tube tightly, disrupt samples with appropriate device (Disrupter Genie : Scientific Industries). Even disruption
device is not available, it is possible to extract DNA/RNA by treatment with Vortex at 2 min. 4. After the process of disruption, add 200μL of SDS solution+ and enhance bacteriolysis at 70℃ / 10min. 5. Add 400μL of phenol mixture and shake on the mixer (or Vortex) at 1min. 6. Centrifuge at 15000rpm / 3min and transfer 300μL of the supernatant to sterilized microcentrifuge tube (in case using
Epppendorf tube at 2ml capacity, alcohol is almost completely removed with the operation described in step 9). 7. Add 1mL of Ethanol, invert well and centrifuge at 15000rpm / 2min. 8. Discard the supernatant and add 1mL of 70% Ethanol. Invert well and centrifuge at 15000rpm / 2min. 9. Discard the supernatant carefully with pipette. 10. Dry up the DNA by air or centrifuge. Treat at 55℃/ 5min in case using Heat Block device. 11. Add 200μL of T10E1 Buffer and use the mixture as crude DNA solution.
*Option If concentration of DNA is too high, it may cause amplification of RNA or suppression of DNA amplification reaction. Record absorption value using NanoDrop at 260nm, 260nm / 280nm, 260nm / 230nm and choose appropriate amount for next step of gene amplification process. (If absorption value is reach to the level of more than 1.8 at 260 / 280nm, it is possible to apply directory to PCR). In this case, ahead to next step of “Purification example of crude DNA/RNA described next.
Advanced Microorganism Research #69503KH01
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29
Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
30
Example of purification from crude DNA / RNA solution
Purification of DNA is possible to operate using Silica-coated magnetic beads (commercially available). DNA physically attaches to Silica while no absorption with Humic Acid. This difference of reactivity enables to isolate specifically DNA.
A) Example of DNA purification with magnetic Beads 1. Mix 200μL of crude DNA solution with 10μL of 5M NaCl and transfer to microcentrifuge tube. 2. Stay at 5min and capture the magnetic beads. Discard the supernatant after 1min of the treatment. 3. Add 500μL of wash buffer attached with beads, mix well and capture magnetic beads. Discard supernatant after 1 minute of the
treatment. 4. Add 500μL of wash buffer again, mix well and capture the magnetic beads. Discard thesupernatant after 1min of the treatment. 5. Add 1000μL of 70% Ethanol washing solution, mix well and capture the magnetic beads. Discard the supernatant completely
with care not to make the alcohol remain. 6. Add 100μL of DEPC treated water. 7. Stay at 5min /room temperature, capture the magnetic beads. Collect the supernatant after1min of the treatment and transfer to
sterile tube.
Advanced Microorganism Research #69503KH01
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Advanced Microorganism Research #69503KH01
The copyright of the text and illustration in this instruction for use belongs to Takayuki Ezaki and AMR Co., Ltd.
32
7: Usage in gene amplification of extracted DNA by PCR 1) Storage of extracted DNA/RNA
Cool the extracted DNA/RNA in ice immediately. In case it is not treated for gene amplification immediately, freeze the extracted DNA/RNA quickly.
2) Concentration of the extracted DNA
When the extracted DNA is subjected to gene amplification, the high DNA level would inhibit PCR reaction. Therefore, it is recommended to adjust the concentration of the extracted DNA so that the amount of DNA can be kept less than 100 ng per a tube during amplification (about 25 ng/tube for the optimum amount). As a spectrophotometer is usually used to determine concentration/purity of DNA, the procedure is shown below. The concentration of nucleic acid is calculated according to the following equation, expressed as the concentration unit of μg/mL. [Absorbance at 260 nm (A260)] × [coefficient specific for the type of nucleic acid] × [optical path length of the cell (m)/10] When correction for optical path length is made by the software of the instrument, the last term is unnecessary. The coefficients for double strand DNA, single strand DNA or oligo DNA, and RNA are generally 50, 33, and 40, respectively. The purity test of the extracted nucleic acid is performed based on the “absorbance ratio” shown below. [Absorbance at 260 nm (A260)] / [Absorbance at 280 nm (A280)] As the value of A280 refers to the amount of protein or phenol contained in the sample, an ideal absorbance ratio is not less than 1.8. (When the value is significantly low, PCR may be inhibited. Therefore, it is recommended to repeat extraction and purification from addition of SDS solution+ (without heating) or to remove the contaminant of low molecules with such as spin columns.)
3) Buffer for storage
It is preferable that the extracted/purified DNA/RNA be resuspended in DEPC-treated water and then immediately subjected to amplification. When it is stored, dissolve in RNase-free 10 mM Tris-1mM EDTA, pH 8.0 or pH 7.6 (TE buffer). Use the solution of around pH 8.0 and around pH 7.6 for DNA and RNA, respectively.
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8: Precautions for use and handling 1) Precautions for handling (1) During disruption with a homogenizer, the disruption conditions other than those with the recommended device (or a tabletop-
type mixer) may damage the tube containing beads. Especially, vigorous shaking should be avoided in the device dedicated for cell-disruption with beads.
(2) Lysis buffer contains the substance that irritates the skin and may cause irritation on certain individuals. Wear gloves during
operations.
(3) The phenol mixture contains phenol, which irritates the eyes, skin and mucosa, and chloroform, which irritates the eyes, nose, throat, and skin and may adversely affect the central nervous systems, liver, etc. Wear goggles, mask, and gloves and pay special attention when handle it.
(4) Take extra care so that the drug solutions should not contact with the skin, eyes, and mucosa or into the month. If it makes
contact with skin, eyes, and mucosa, flush with running water immediately.
(5) Handle samples (specimens) after taking measures to prevent biohazard under the direction of the person with expertise in handling of microorganisms.
2) Precautions for use (1) Not to use any expired product.
(2) Strictly observe the storage conditions.
Tubes containing beads, SDS solution+, and DEPC-treated water can be stored at room temperature. Lysis buffer and phenol mixture must be stored under a light-resistant and refrigerated (2 to 10°C) condition.
(3) Not to use the product in which damage of the container or contamination is detected, if any.
(4) In particular, pay special attention to handling RNA. RNA is much more unstable and fragile than DNA; such as
contamination of airborne dust into the tube or contact of hand with the inner side of the lid of the tube may cause degradation of RNA. Therefore, wear gloves and mask during experiment with RNA, use plastic or glass containers after removal of RNase, and keep the lid of the container or tube closed when not in use.
(5) Although less attention for decomposition enzyme is required for DNA than RNA, avoid contamination of substances such as
bacteria other than the sample during operation.
3) Disposal Consideration (1) The phenol mixture contains 42% of phenol and 40% of chloroform, and the lysis buffer contains 0.72% of 2-mercaptoethanol.
Regardless of whether it is before or after use, dispose of these solutions according to the rules in the Waste Management and Public Cleaning Act, the Water Pollution Control Law, and the Poisonous and Deleterious Substances Control Law as well as instructions of the local authorities.
(2) In case any drug solution spills on the working table or floor, remove it immediately by wiping with such as waste cloth or in
other ways followed by thorough cleaning such as a new waste cloth using water or alcohol (for phenol mixture). In case the beads drops, collect them as many as possible, and thoroughly wipe them up with such as wet waste cloth.
(3) Make sure to sterilize the tools used in treatment of specimens by heating in an autoclave (at 121°C for 30 minutes or longer),
and take appropriate actions for disposal.
Advanced Microorganism Research #69503KH01
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34
9: Storage Light-resistant and refrigerated Storage temperature: 2 – 10°C
10: Shelf life 9 months
Distibutor: Kyokuto Pharmaceutical Industrial Co., Ltd. 7-8, Nihonbashi Kobuna-cho, Chuo-ku, Tokyo, 103-0024 Manufacturer: AMR Advanced Microorganism Research AMR Co., Ltd. 2-210-1, Daigakukita, Gifu-city, Gifu, 501-1111
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