table 1. recognized families of pathogenesis-related proteins family type member properties gene...
TRANSCRIPT
Table 1. Recognized families of pathogenesis-related proteins
Family Type member Properties Gene symbolsPR-1 Tobacco PR-1a Unknown Ypr1PR-2 Tobacco PR-2 β-1,3-glucanase Ypr2, [Gns2 (‘Glb’)]PR-3 Tobacco P, Q Chitinase type I, II, IV, V, VI, VII Ypr3, ChiaPR-4 Tobacco ‘R’ Chitinase type I, II Ypr4, ChidPR-5 Tobacco S Thaumatin-like YPR-5PR-6 Tomato Inhibitor I Proteinase-inhibitor Ypr6, Pis (‘Pin’)PR-7 Tomato P69 Endoproteinase Ypr7PR-8 Cucumber chitinase Chitinase type III Ypr8, ChibPR-9 Tobacco “lignin-forming Peroxidase Ypr9, Prx
peroxidase”PR-10 Parsley “PR1” Ribonuclease-like Ypr10PR-11 Tobacco “class V” chitinase Chitinase, type I Ypr11, ChicPR-12 Radish Rs-AFP3 Defensin Ypr12PR-13 Arabidopsis THI2.1 Thionin Ypr13, ThiPR-14 Barley LTP4 Lipid-transfer protein Ypr14, LtpPR-15 Barley OxOa (germin) Oxalate oxidase Ypr15PR-16 Barley OxOLP Oxalate-oxidase-like Ypr16PR-17 Tobacco PRp27 Unknown Ypr17
Further details can be found at http://www.bio.uu.nl/~fytopath/PR-families.htm.
Van Loon LC, Rep M, Pieterse CMJ (2006) Significance of inducible defense-related proteins in infected plants. Annu. Rev. Phytopathol. 44:135-162.
Osmotin Treatment (48h)
0
0.001
0.003
0.005
Control 1ug/ml 7.5ug/ml
10ug/ml
PG
C1α
mR
NA
Osmotin Promotes AMPK Activation And PGC1α Gene Expression in Human Biopsy
Liver Cells
Osmotin (ug/ml) 0 1 5 7.5 10 20
PR-5/Thaumatin-like Proteins Occur In Insects, Nematodes and Some Fungi
•Sequence and structural similarity with plant PR-5 proteins•As families
Functions
defense against pathogenInnate Immunity
conidial germination?
TNFalfa
Complement C1q
Adiponectin
Hibernation-specific proteins
Innate/Adaptive immunity
Energy metabolism
Are PR-5 Domains Equivalent To Mammalian gC1q Protein
Domains?
Structural proteinsCollagen
Brain-specific proteins
Neurotransmitters?
What Are Functions Of PR-5 Domain Proteins In Plants?
Animals
gC1q
DefenseEnergy
Metabolism↓
Carbon utilization
Plants
PR-5
DefenseEnergy
Metabolism
?
PR5K3 (At5g38280) (665 aa)
PR5K2 (At4g18250) (853aa)THN THN KINASE
KINASETHN
Mutation Of PR5-kinases Results In Nighttime Starch Accumulation
Col-0
Vec-1
EOD
PR5k3 RNAi 15-4
PR5k3 RNAi 22-6
PR-5k2-1 PR5k2-4
Sta
rch
stai
nE
nd o
f da
rk
PR-5k2-4 PR-5k2-1
PR-5k3 RNAi
PR5Ks Function
Energy Metabolism Or
Carbon Utilization
sugar
STARCH
Leaf Nighttime Starch Degradation Is Stimulated By Carbon Or Energy Shortage
Abiotic/biotic stress
Energy shortageIntracellular Sucrose
highExtracellular sugar low
Dark
increasedecrease
PR5K?
PR5K?
PR5K?
Starch degradation defect
Shortage of non-C nutrient
PR5K?
Defect in cell wall biosynthesisEnergy &
C shortage C excess
Constitutive
Induced