lecture 10. proteomics ii
DESCRIPTION
Lecture 10. Proteomics II. **Lewis TS, Hunt JB, Aveline LD, Jonscher KR, Louie DF, Yeh JM, Nahreini TS, Resing KA, Ahn NG. 2000. Identification of novel MAP kinase pathway signaling targets by functional proteomics and mass spectrometry. Mol Cell 6 :1343-1354 - PowerPoint PPT PresentationTRANSCRIPT
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Lecture 10. Proteomics II
**Lewis TS, Hunt JB, Aveline LD, Jonscher KR, Louie DF, Yeh JM, Nahreini TS, Resing KA, Ahn NG. 2000. Identification of novel MAP kinase pathway signaling targets by functional proteomics and mass spectrometry. Mol Cell 6:1343-1354
Zhu H, Bilgin M, Bangham R, Hall D, Casamayor A, Bertone P, Lan N, Jansen R, Bidlingmaier S, Houfek T, Mitchell T, Miller P, Dean RA, Gerstein M, Snyder M. 2001. Global analysis of protein activities using proteome chips. Science. 293:2101-2105.
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Paper 1.
Two parts:
1. 2D-gels to Display the Proteomeand Potential Erk1/2 Targets
2. MS to Identify the Erk1/2 Targets
Lewis et al. 2000. Identification of novel MAP kinase pathway signaling targets by functional proteomics and mass spectrometry. Mol Cell 6:1343-1354
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The Mitogen Activated Protein Kinase (MAPKK) Family
MAPKKK
MAPKK
MAPK
Raf MKK1 MKK4
MEK1/2 JEK1/2 MKK6
ERK1/2 JNK1/2 p38
GrowthDifferentiationApoptosisStress Responses
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Phorbol Ester (PMA)
ras
raf
MEK1/2
Erk1/2
Protein Kinase C (PKC)
Differentiation K562 cellsTo Megakaryocytes(Platelets)
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Part 1. 2D Gels to Compare the Proteome in PMA treated K562 cells
3500 proteins resolved: detection from 5000-107 copies per cell
91 proteins found different in PMS treated cells (30 down, 61 up):magnitude change >1.5-fold;
reproducible in 3 gels from at least 2 experiments
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Kinetic Analysis of PMA-dependent changes in expression
Down
Up
MobilityAltered
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Cluster Analysis of the 91 Changes Reveals4 General Classes
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Phorbol Ester (PMA)
ras
raf
MEK1/2
Erk1/2
Protein Kinase C (PKC)
Differentiation K562 cellsTo Megakaryocytes(Platelets)
U0126
Question: Are these proteins regulated by Erks or PKC?
1. Pharmacological InhibitorShould Inhibit Changes
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1. Pharmacological Inhibitor Should Inhibit Changes
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No Phorbol Ester (PMA)
ras
raf
MEK1/2*
Erk1/2 Differentiation K562 cellsTo Megakaryocytes(Platelets)
MEK1 Dominant Positive Mutation
Question: Are these proteins regulated by Erks or PKC?
2. Dominant Signaling Mutations Should Cause Changes in Absence of PMA
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2. Dominant Signaling Mutations Should Cause Changes in Absence of PMA
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CorrespondenceBetween U0126Inhibition and MKK1* Stimulation
Conclusion:
66% of ChangesAre DIRECT Targetsof Erk1/2
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Peptide Mixture
MALDI (Matrix Assisted Laser Desorption Ionization) Mass SpecUsed to Fingerprint the 91 proteins
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HPLC coupled with nanospray MS Used to Confirm Identity of the Proteins
-Result: 41 proteins account for the 91 Changes-25 are Direct Targets of Erks-20/25 Represent newly Defined Targets
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Product:Precursor Relationships
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Paper 2. Protein Chips to Study Protein:Proteinor Protein:Lipid Interactions
Zhu H, et al 2001 Global analysis of protein activities using proteome chips. Science. 293:2101-2105.
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Yeast Proteome on a Single Glass Slide:5800 GST Proteins Purified and Placed on the Chip
Probed with anti-GST as a CONTROL
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Finding All Protein Partners for Calmodulin:14/39 Contain a Conserved Calmodulin Motif
Biotinylated Calmodulin Used to Probe Chip
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Identification of Lipid Binding Proteins
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PI3 Interacting Proteins
Specificfir PI3
Bind PI3and PC
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Conventional Techniques ConfirmLipid Binding by Proteins Identified
with the CHIP