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Conserved domains on  [gi|1197216029|ref|WP_086466662|]
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MULTISPECIES: Hsp20/alpha crystallin family protein [Alphaproteobacteria]

Protein Classification

Hsp20/alpha crystallin family protein( domain architecture ID 11414641)

Hsp20/alpha crystallin family protein is a small, stress-induced protein, between 12-43 kDa, which functions as an ATP-independent chaperone that prevents aggregation and protects against cell stress, induced by heat, osmotic, or acid shock

Gene Ontology:  GO:0009408|GO:0042802
PubMed:  15335775|2853609|7723051|22177323
SCOP:  4002439

Graphical summary

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List of domain hits

 Name Accession Description Interval E-value
IbpA COG0071
Small heat shock protein IbpA, HSP20 family [Posttranslational modification, protein turnover, ...
 59-163 2.23e-42

Small heat shock protein IbpA, HSP20 family [Posttranslational modification, protein turnover, chaperones];


:

Pssm-ID: 439841  Cd Length: 105  Bit Score: 136.43  E-value: 2.23e-42
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1197216029  59 DVVETDKAIEVSIELPGMEMKDIEVTVNDDMLTVKGEKKIERQEEKKGYYLSERSYGAIYRTIPLPPGVDGEKAQASFKN 138
Cdd:COG0071     3 DIEETDDAYVITADLPGVDKEDIDVTVEGNVLTISGERKEEEEEEGENYLRRERRYGSFERSFTLPDDVDVDKIEASYEN 82

                          90       100
                  ....*....|....*....|....*
gi 1197216029 139 GVLTIKLPQTPEaqAKVKRIEVKNG 163
Cdd:COG0071    83 GVLTITLPKAEE--AKPRKIEIKAG 105
 
Name Accession Description Interval E-value
IbpA COG0071
Small heat shock protein IbpA, HSP20 family [Posttranslational modification, protein turnover, ...
 59-163 2.23e-42

Small heat shock protein IbpA, HSP20 family [Posttranslational modification, protein turnover, chaperones];


Pssm-ID: 439841  Cd Length: 105  Bit Score: 136.43  E-value: 2.23e-42
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1197216029  59 DVVETDKAIEVSIELPGMEMKDIEVTVNDDMLTVKGEKKIERQEEKKGYYLSERSYGAIYRTIPLPPGVDGEKAQASFKN 138
Cdd:COG0071     3 DIEETDDAYVITADLPGVDKEDIDVTVEGNVLTISGERKEEEEEEGENYLRRERRYGSFERSFTLPDDVDVDKIEASYEN 82

                          90       100
                  ....*....|....*....|....*
gi 1197216029 139 GVLTIKLPQTPEaqAKVKRIEVKNG 163
Cdd:COG0071    83 GVLTITLPKAEE--AKPRKIEIKAG 105
ACD_sHsps-like cd06464
Alpha-crystallin domain (ACD) of alpha-crystallin-type small(s) heat shock proteins (Hsps). ...
 59-146 1.87e-34

Alpha-crystallin domain (ACD) of alpha-crystallin-type small(s) heat shock proteins (Hsps). sHsps are small stress induced proteins with monomeric masses between 12 -43 kDa, whose common feature is the Alpha-crystallin domain (ACD). sHsps are generally active as large oligomers consisting of multiple subunits, and are believed to be ATP-independent chaperones that prevent aggregation and are important in refolding in combination with other Hsps.


Pssm-ID: 107221  Cd Length: 88  Bit Score: 115.73  E-value: 1.87e-34
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1197216029  59 DVVETDKAIEVSIELPGMEMKDIEVTVNDDMLTVKGEKKiERQEEKKGYYLSERSYGAIYRTIPLPPGVDGEKAQASFKN 138
Cdd:cd06464     1 DVYETDDAYVVEADLPGFKKEDIKVEVEDGVLTISGERE-EEEEEEENYLRRERSYGSFSRSFRLPEDVDPDKIKASLEN 79


                  ....*...
gi 1197216029 139 GVLTIKLP 146
Cdd:cd06464    80 GVLTITLP 87
HSP20 pfam00011
Hsp20/alpha crystallin family; Not only do small heat-shock-proteins occur in eukaryotes and ...
 59-160 7.42e-24

Hsp20/alpha crystallin family; Not only do small heat-shock-proteins occur in eukaryotes and prokaryotes but they have also now been shown to occur in cyanobacterial phages as well as their bacterial hosts.


Pssm-ID: 459629  Cd Length: 100  Bit Score: 89.21  E-value: 7.42e-24
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1197216029  59 DVVETDKAIEVSIELPGMEMKDIEVTVNDDMLTVKGEKKIERQEEKkgYYLSERSYGAIYRTIPLPPGVDGEKAQASFKN 138
Cdd:pfam00011   1 DIKEDEDAFEVRLDVPGFKPEELKVKVEDNRLLVKGEHEEEKEDDH--GLRSERSYGSFSRKFTLPENADPDKVKASLKD 78

                          90       100
                  ....*....|....*....|..
gi 1197216029 139 GVLTIKLPQtPEAQAKVKRIEV 160
Cdd:pfam00011  79 GVLTVTVPK-LEPEPKERRIQI 99
PRK10743 PRK10743
heat shock chaperone IbpA;
69-161 5.12e-04

heat shock chaperone IbpA;


Pssm-ID: 182691  Cd Length: 137  Bit Score: 38.25  E-value: 5.12e-04
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1197216029  69 VSIELPGMEMKDIEVTVNDDMLTVKGEKKIERQEEKKGYY-LSERSYgaiYRTIPLPPGVdgEKAQASFKNGVLTIKLPQ 147
Cdd:PRK10743   49 IAIAVAGFAESELEITAQDNLLVVKGAHADEQKERTYLYQgIAERNF---ERKFQLAENI--HVRGANLVNGLLYIDLER 123

                          90
                  ....*....|....*
gi 1197216029 148 -TPEAQaKVKRIEVK 161
Cdd:PRK10743  124 vIPEAK-KPRRIEIN 137
 
Name Accession Description Interval E-value
IbpA COG0071
Small heat shock protein IbpA, HSP20 family [Posttranslational modification, protein turnover, ...
 59-163 2.23e-42

Small heat shock protein IbpA, HSP20 family [Posttranslational modification, protein turnover, chaperones];


Pssm-ID: 439841  Cd Length: 105  Bit Score: 136.43  E-value: 2.23e-42
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1197216029  59 DVVETDKAIEVSIELPGMEMKDIEVTVNDDMLTVKGEKKIERQEEKKGYYLSERSYGAIYRTIPLPPGVDGEKAQASFKN 138
Cdd:COG0071     3 DIEETDDAYVITADLPGVDKEDIDVTVEGNVLTISGERKEEEEEEGENYLRRERRYGSFERSFTLPDDVDVDKIEASYEN 82

                          90       100
                  ....*....|....*....|....*
gi 1197216029 139 GVLTIKLPQTPEaqAKVKRIEVKNG 163
Cdd:COG0071    83 GVLTITLPKAEE--AKPRKIEIKAG 105
ACD_sHsps-like cd06464
Alpha-crystallin domain (ACD) of alpha-crystallin-type small(s) heat shock proteins (Hsps). ...
 59-146 1.87e-34

Alpha-crystallin domain (ACD) of alpha-crystallin-type small(s) heat shock proteins (Hsps). sHsps are small stress induced proteins with monomeric masses between 12 -43 kDa, whose common feature is the Alpha-crystallin domain (ACD). sHsps are generally active as large oligomers consisting of multiple subunits, and are believed to be ATP-independent chaperones that prevent aggregation and are important in refolding in combination with other Hsps.


Pssm-ID: 107221  Cd Length: 88  Bit Score: 115.73  E-value: 1.87e-34
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1197216029  59 DVVETDKAIEVSIELPGMEMKDIEVTVNDDMLTVKGEKKiERQEEKKGYYLSERSYGAIYRTIPLPPGVDGEKAQASFKN 138
Cdd:cd06464     1 DVYETDDAYVVEADLPGFKKEDIKVEVEDGVLTISGERE-EEEEEEENYLRRERSYGSFSRSFRLPEDVDPDKIKASLEN 79


                  ....*...
gi 1197216029 139 GVLTIKLP 146
Cdd:cd06464    80 GVLTITLP 87
ACD_sHsps_p23-like cd00298
This domain family includes the alpha-crystallin domain (ACD) of alpha-crystallin-type small ...
 60-146 3.38e-24

This domain family includes the alpha-crystallin domain (ACD) of alpha-crystallin-type small heat shock proteins (sHsps) and a similar domain found in p23-like proteins. sHsps are small stress induced proteins with monomeric masses between 12 -43 kDa, whose common feature is this ACD. sHsps are generally active as large oligomers consisting of multiple subunits, and are believed to be ATP-independent chaperones that prevent aggregation and are important in refolding in combination with other Hsps. p23 is a cochaperone of the Hsp90 chaperoning pathway. It binds Hsp90 and participates in the folding of a number of Hsp90 clients including the progesterone receptor. p23 also has a passive chaperoning activity. p23 in addition may act as the cytosolic prostaglandin E2 synthase. Included in this family is the p23-like C-terminal CHORD-SGT1 (CS) domain of suppressor of G2 allele of Skp1 (Sgt1) and the p23-like domains of human butyrate-induced transcript 1 (hB-ind1), NUD (nuclear distribution) C, Melusin, and NAD(P)H cytochrome b5 (NCB5) oxidoreductase (OR).


Pssm-ID: 107219  Cd Length: 80  Bit Score: 89.57  E-value: 3.38e-24
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1197216029  60 VVETDKAIEVSIELPGMEMKDIEVTVNDDMLTVKGEKKIERQeekkgyylSERSYGAIYRTIPLPPGVDGEKAQASFKNG 139
Cdd:cd00298     1 WYQTDDEVVVTVDLPGVKKEDIKVEVEDNVLTISGKREEEEE--------RERSYGEFERSFELPEDVDPEKSKASLENG 72


                  ....*..
gi 1197216029 140 VLTIKLP 146
Cdd:cd00298    73 VLEITLP 79
HSP20 pfam00011
Hsp20/alpha crystallin family; Not only do small heat-shock-proteins occur in eukaryotes and ...
 59-160 7.42e-24

Hsp20/alpha crystallin family; Not only do small heat-shock-proteins occur in eukaryotes and prokaryotes but they have also now been shown to occur in cyanobacterial phages as well as their bacterial hosts.


Pssm-ID: 459629  Cd Length: 100  Bit Score: 89.21  E-value: 7.42e-24
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1197216029  59 DVVETDKAIEVSIELPGMEMKDIEVTVNDDMLTVKGEKKIERQEEKkgYYLSERSYGAIYRTIPLPPGVDGEKAQASFKN 138
Cdd:pfam00011   1 DIKEDEDAFEVRLDVPGFKPEELKVKVEDNRLLVKGEHEEEKEDDH--GLRSERSYGSFSRKFTLPENADPDKVKASLKD 78

                          90       100
                  ....*....|....*....|..
gi 1197216029 139 GVLTIKLPQtPEAQAKVKRIEV 160
Cdd:pfam00011  79 GVLTVTVPK-LEPEPKERRIQI 99
ACD_LpsHSP_like cd06471
Group of bacterial proteins containing an alpha crystallin domain (ACD) similar to ...
 57-146 2.20e-23

Group of bacterial proteins containing an alpha crystallin domain (ACD) similar to Lactobacillus plantarum (Lp) small heat shock proteins (sHsp) HSP 18.5, HSP 18.55 and HSP 19.3. sHsps are molecular chaperones that suppress protein aggregation and protect against cell stress, and are generally active as large oligomers consisting of multiple subunits. Transcription of the genes encoding Lp HSP 18.5, 18.55 and 19.3 is regulated by a variety of stresses including heat, cold and ethanol. Early growing L. plantarum cells contain elevated levels of these mRNAs which rapidly fall of as the cells enter stationary phase. Also belonging to this group is Bifidobacterium breve (Bb) HSP20 and Oenococcus oenis (syn. Leuconostoc oenos) (Oo) HSP18. Transcription of the gene encoding BbHSP20 is strongly induced following heat or osmotic shock, and that of the gene encoding OoHSP18 following heat, ethanol or acid shock. OoHSP18 is peripherally associated with the cytoplasmic membrane.


Pssm-ID: 107228  Cd Length: 93  Bit Score: 87.92  E-value: 2.20e-23
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1197216029  57 KSDVVETDKAIEVSIELPGMEMKDIEVTVNDDMLTVKGEK-KIERQEEKKGYYL-SERSYGAIYRTIPLpPGVDGEKAQA 134
Cdd:cd06471     2 KTDIKETDDEYIVEADLPGFKKEDIKLDYKDGYLTISAKRdESKDEKDKKGNYIrRERYYGSFSRSFYL-PNVDEEEIKA 80

                          90
                  ....*....|..
gi 1197216029 135 SFKNGVLTIKLP 146
Cdd:cd06471    81 KYENGVLKITLP 92
ACD_ScHsp26_like cd06472
Alpha crystallin domain (ACD) found in Saccharomyces cerevisiae (Sc) small heat shock protein ...
 59-146 6.41e-16

Alpha crystallin domain (ACD) found in Saccharomyces cerevisiae (Sc) small heat shock protein (Hsp)26 and similar proteins. sHsps are molecular chaperones that suppress protein aggregation and protect against cell stress, and are generally active as large oligomers consisting of multiple subunits. ScHsp26 is temperature-regulated, it switches from an inactive to a chaperone-active form upon elevation in temperature. It associates into large 24-mers storage forms which upon heat shock disassociate into dimers. These dimers initiate the interaction with non-native substrate proteins and re-assemble into large globular assemblies having one monomer of substrate bound per dimer. This group also contains Arabidopsis thaliana (Ath) Hsp15.7, a peroxisomal matrix protein which can complement the morphological phenotype of S. cerevisiae mutants deficient in Hsps26. AthHsp15.7 is minimally expressed under normal conditions and is strongly induced by heat and oxidative stress. Also belonging to this group is wheat HSP16.9 which differs in quaternary structure from the shell-type particles of ScHsp26, it assembles as a dodecameric double disc, with each disc organized as a trimer of dimers.


Pssm-ID: 107229  Cd Length: 92  Bit Score: 68.87  E-value: 6.41e-16
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1197216029  59 DVVETDKAIEVSIELPGMEMKDIEVTVNDD-MLTVKGEKKIERQEEKKGYYLSERSYGAIYRTIPLPPGVDGEKAQASFK 137
Cdd:cd06472     3 DWKETPEAHVFKADVPGVKKEDVKVEVEDGrVLRISGERKKEEEKKGDDWHRVERSSGRFVRRFRLPENADADEVKAFLE 82


                  ....*....
gi 1197216029 138 NGVLTIKLP 146
Cdd:cd06472    83 NGVLTVTVP 91
metazoan_ACD cd06526
Alpha-crystallin domain (ACD) of metazoan alpha-crystallin-type small(s) heat shock proteins ...
 59-146 1.82e-09

Alpha-crystallin domain (ACD) of metazoan alpha-crystallin-type small(s) heat shock proteins (Hsps). sHsps are small stress induced proteins with monomeric masses between 12 -43 kDa, whose common feature is the Alpha-crystallin domain (ACD). sHsps are generally active as large oligomers consisting of multiple subunits, and are believed to be ATP-independent chaperones that prevent aggregation and are important in refolding in combination with other Hsps.


Pssm-ID: 107247  Cd Length: 83  Bit Score: 51.75  E-value: 1.82e-09
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1197216029  59 DVVETDKAIEVSIELPGMEMKDIEVTVNDDMLTVKGEKKiERQEEkKGYYLSErsygaIYRTIPLPPGVDGEKAQASF-K 137
Cdd:cd06526     1 VVNDDDEKFQVTLDVKGFKPEELKVKVSDNKLVVEGKHE-EREDE-HGYVSRE-----FTRRYQLPEGVDPDSVTSSLsS 73


                  ....*....
gi 1197216029 138 NGVLTIKLP 146
Cdd:cd06526    74 DGVLTIEAP 82
ACD_IbpA-B_like cd06470
Alpha-crystallin domain (ACD) found in Escherichia coli inclusion body-associated proteins ...
 68-145 6.91e-07

Alpha-crystallin domain (ACD) found in Escherichia coli inclusion body-associated proteins IbpA and IbpB, and similar proteins. IbpA and IbpB are 16 kDa small heat shock proteins (sHsps). sHsps are molecular chaperones that suppress protein aggregation and protect against cell stress, and are generally active as large oligomers consisting of multiple subunits. IbpA and IbpB are produced during high-level production of various heterologous proteins, specifically human prorenin, renin and bovine insulin-like growth factor 2 (bIGF-2), and are strongly associated with inclusion bodies containing these heterologous proteins. IbpA and IbpB work as an integrated system to stabilize thermally aggregated proteins in a disaggregation competent state. The chaperone activity of IbpB is also significantly elevated as the temperature increases from normal to heat shock. The high temperature results in the disassociation of 2-3-MDa IbpB oligomers into smaller approximately 600-kDa structures. This elevated activity seen under heat shock conditions is retained for an extended period of time after the temperature is returned to normal. IbpA also forms multimers.


Pssm-ID: 107227  Cd Length: 90  Bit Score: 44.83  E-value: 6.91e-07
                          10        20        30        40        50        60        70
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....
gi 1197216029  68 EVSIELPGMEMKDIEVTVNDDMLTVKGEKKIERQEEKKgyYLSER-SYGAIYRTIPLPPGVdgEKAQASFKNGVLTIKL 145
Cdd:cd06470    14 RITLAVAGFSEDDLEIEVENNQLTVTGKKADEENEERE--YLHRGiAKRAFERSFNLADHV--KVKGAELENGLLTIDL 88
ArsA_HSP20 pfam17886
HSP20-like domain found in ArsA; This domain is found at the C-terminus of ArsA like proteins. ...
 64-144 7.39e-05

HSP20-like domain found in ArsA; This domain is found at the C-terminus of ArsA like proteins. This domain is related to HSP20.


Pssm-ID: 436117  Cd Length: 63  Bit Score: 39.00  E-value: 7.39e-05
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1197216029  64 DKAIEVSIELPGMEMKDIEVTVNDDMLTVkgekKIERQEekkgyylsersygaiyRTIPLPPGVDGEKAQ-ASFKNGVLT 142
Cdd:pfam17886   1 DGGYVLRLRLPFVDKEDVDLSRSGDELII----KIGNFR----------------RNITLPRSLARLEVTgAKFEDGVLR 60


                  ..
gi 1197216029 143 IK 144
Cdd:pfam17886  61 IR 62
PRK10743 PRK10743
heat shock chaperone IbpA;
69-161 5.12e-04

heat shock chaperone IbpA;


Pssm-ID: 182691  Cd Length: 137  Bit Score: 38.25  E-value: 5.12e-04
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1197216029  69 VSIELPGMEMKDIEVTVNDDMLTVKGEKKIERQEEKKGYY-LSERSYgaiYRTIPLPPGVdgEKAQASFKNGVLTIKLPQ 147
Cdd:PRK10743   49 IAIAVAGFAESELEITAQDNLLVVKGAHADEQKERTYLYQgIAERNF---ERKFQLAENI--HVRGANLVNGLLYIDLER 123

                          90
                  ....*....|....*
gi 1197216029 148 -TPEAQaKVKRIEVK 161
Cdd:PRK10743  124 vIPEAK-KPRRIEIN 137
PIH1_CS pfam18201
PIH1 CS-like domain; This domain is found in yeast PIH1 and its homologs. This domain consists ...
 65-146 5.99e-04

PIH1 CS-like domain; This domain is found in yeast PIH1 and its homologs. This domain consists of a seven-stranded beta sandwich with the topology of a CS domain, a structural motif also found in Hsp90 co-chaperones such as p23/Sba1 and Sgt1.


Pssm-ID: 408028 [Multi-domain]  Cd Length: 100  Bit Score: 37.39  E-value: 5.99e-04
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 1197216029  65 KAIEVSIELPGME-MKDIEVTVnddmltvkGEKKIERQEEKKGYYLSersygaiyrtIPLPPGVDGEKAQASF--KNGVL 141
Cdd:pfam18201  32 KELVIEIYLPLLTsAAEIKLRV--------TERRLVLESEKAKYFLS----------LKLPYPVDEDRGSAKFnkKTRTL 93


                  ....*
gi 1197216029 142 TIKLP 146
Cdd:pfam18201  94 KVTLP 98
 
Blast search parameters
Data Source: Precalculated data, version = cdd.v.3.21
Preset Options:Database: CDSEARCH/cdd   Low complexity filter: no  Composition Based Adjustment: yes   E-value threshold: 0.01

References:

  • Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
  • Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
  • Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
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