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Table 2 sHSP classification in sHSPdb

From: sHSPdb: a database for the analysis of small Heat Shock Proteins

sHSP class

(Usual name)

Localization

(plants sHSP)

Examples of representant and/or annotation

Motif allowing to classify sequencesa

Motif position in sequences

Number of sHSP classifiedb

Main

taxonomy

Class 1

(Class I)

Cytosol-nucleus

TaHsp16.9

PsHsp18.1

[AGPSTV][ADEGHMNQTV][ILPSVY][KR][AFGNPQST][IV][ADEHKNQ][IFV][ACGNSTY][ADEGV]?(.{1,6})?$

C-terminal

362

Viridiplantae

Class 2

(Class II)

Cytosol-nucleus

17–17.9 kDa HSP

[ILNV].{0,1}[KNR].{0,1}[PT]P[APQ].{1,2}[AKR].{0,6}[IV].{0,5}$

C-terminal

111

Viridiplantae

Class 3

(Class_IV)

Endoplasmic reticulum

 

WH.{8,10}[FS][IW]R[QR][FL].{2,2}P.{3,3}[^K]

Central

68

Viridiplantae

Class 4

(Class_V)

  

[^E]A[RS]AA$

C-terminal

46

Viridiplantae

Class 5

(Class_VI)

 

21.7–22.3 kDa

D.{2,3}D.{1,2}PLW

N-terminal

64

Viridiplantae

Class 6

(Class M)

Mitochondria

HSP23

[LM].{10,10}[KR].{1,2}[DEKQ][DEKNQ][DEGHPQ].{2,2}[DEN].{3,3}[IV].[^H][DENQ]$

C-terminal

118

Viridiplantae

Class 7

(Class P)

Plastids

HSP26 to HSP26.8

CPsHSP21

[DEFHNQSTY][AGKPRST][KT][IV][FHILMTV][DEG][IRV][DEHKNQS][ILV][EKNQR]G?$

C-terminal

102

Viridiplantae

Class 8

(Class Px)

Peroxysome

 

[IV].{3,3}[^D][KR]L$

C-terminal

52

Viridiplantae

Class 9

(Class RA)

Ribosome

Associated

sHSP15

RNA-binding S4

P[^P]K.{2,2}R[QR].{7,27}$

C-terminal

247

Bacteria

Class 10

(HSP20/IbpA/IbpB)

 

Hsp20 - IbpA/B - HspA/B - HspB6

P[GKP][FHMY][DN][ILV]

N-terminal

545

Bacteria

Fungi

Class 11

(HSP20/HspC)

  

[FILMV][^P].?[DEQ][FILMPV][ADEKNQS][^S][FILMV][FLVW][ADEGHIMNQS]

N-terminal

679

Bacteria

Archaea

Fungi

Class 12

(HSP27

/aA-crystallin

/aB-crystallin)

 

HspB1

aA or aB -crystallin

HspB4 or 5

[AGHNPQRSTY][DHKR][AFILMPV].[DES][DQ].F[AG]

N-terminal

534

Metazoa

Bacteria

Class 13

(beta-9)

  

[LM][LP][SV].{2,2}L.[ADEN].{11,14}F[KQ]

N-terminal

56

Metazoa

Class 14

(HSP Beta_3)

  

PVRY[EKQ]

N-terminal

84

Metazoa

Class 15

(HSP Beta_7)

  

EIKI$

C-terminal

26

Metazoa

Class 16

(HSP Beta_11)

 

HSP family B

[ADE]TFW

N-terminal

76

Metazoa

Class 17

(HspQ)

  

K[FY][AFG][IL]G

N-terminal

88

Bacteria

Class 18

(HSP42)

 

Hsp42p

DEEL.{1,16}$

C-terminal

16

Fungi

Class 19

(HSP30)

  

[PST][AEIV][HLR][PST][LH]W[PT][AEHT]

N-terminal

24

Metazoa

Class 20

(HSP31)

 

HchA « Holdases »

TG.{4,4}E.{11,11}G

N-terminal

147

Bacteria

Fungi

Class 21

(HSP33)

 

33 kDa chaperonin « Holdases »

C.[FY]C.{3,3}Y

C-terminal

135

Bacteria

  1. aSequences classified via the motif of the class. Regular expression syntax for amino acid motifs: [XYZ] means X or Y or Z; X? means X is optional; [^XY] means not X nor Y; $ means C-terminal position;.means any amino acid; X{n,m} means n to m times X. bNumber of sequences retrieved in sHSPdb using the motif indicated