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Protein

Alpha-crystallin A chain

Gene

CRYAA

Organism
Cavia porcellus (Guinea pig)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Experimental evidence at protein leveli

Functioni

Contributes to the transparency and refractive index of the lens. Has chaperone-like activity, preventing aggregation of various proteins under a wide range of stress conditions (By similarity).By similarity

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi79Zinc 1By similarity1
Metal bindingi100Zinc 2By similarity1
Metal bindingi102Zinc 2By similarity1
Metal bindingi107Zinc 1By similarity1
Metal bindingi115Zinc 1By similarity1

GO - Molecular functioni

Complete GO annotation...

Keywords - Molecular functioni

Chaperone, Eye lens protein

Keywords - Ligandi

Metal-binding, Zinc

Names & Taxonomyi

Protein namesi
Recommended name:
Alpha-crystallin A chain
Gene namesi
Name:CRYAA
OrganismiCavia porcellus (Guinea pig)
Taxonomic identifieri10141 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaHystricognathiCaviidaeCavia
Proteomesi
  • UP000005447 Componenti: Unassembled WGS sequence

Subcellular locationi

  • Cytoplasm By similarity
  • Nucleus By similarity

  • Note: Translocates to the nucleus during heat shock and resides in sub-nuclear structures known as SC35 speckles or nuclear splicing speckles.By similarity

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Cytoplasm, Nucleus

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001258521 – 173Alpha-crystallin A chainAdd BLAST173

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei1N-acetylmethionineCurated1
Modified residuei6Deamidated glutamine; partialBy similarity1
Modified residuei21Omega-N-methylated arginineBy similarity1
Modified residuei45PhosphoserineBy similarity1
Modified residuei50Deamidated glutamine; partialBy similarity1
Modified residuei70N6-acetyllysineBy similarity1
Modified residuei90Deamidated glutamine; partialBy similarity1
Modified residuei99N6-acetyllysineBy similarity1
Modified residuei101Deamidated asparagine; partialBy similarity1
Modified residuei122PhosphoserineBy similarity1
Modified residuei123Deamidated asparagine; partialBy similarity1
Modified residuei147Deamidated glutamine; partialBy similarity1
Glycosylationi162O-linked (GlcNAc)By similarity1

Post-translational modificationi

Acetylation at Lys-70 seems to increase chaperone activity.By similarity
Undergoes age-dependent proteolytical cleavage at the C-terminus.By similarity

Keywords - PTMi

Acetylation, Glycoprotein, Methylation, Phosphoprotein

Interactioni

Subunit structurei

Heteropolymer composed of three CRYAA and one CRYAB subunits. Inter-subunit bridging via zinc ions enhances stability, which is crucial as there is no protein turn over in the lens (By similarity).By similarity

Structurei

3D structure databases

ProteinModelPortaliP68281.
SMRiP68281.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the small heat shock protein (HSP20) family.PROSITE-ProRule annotation

Phylogenomic databases

GeneTreeiENSGT00760000119238.
HOGENOMiHOG000233954.
HOVERGENiHBG054766.
InParanoidiP68281.

Family and domain databases

Gene3Di2.60.40.790. 1 hit.
InterProiIPR002068. A-crystallin/Hsp20_dom.
IPR001436. Alpha-crystallin/HSP.
IPR012274. Alpha-crystallin_A.
IPR003090. Alpha-crystallin_N.
IPR031107. HSP20.
IPR008978. HSP20-like_chaperone.
[Graphical view]
PANTHERiPTHR11527. PTHR11527. 1 hit.
PTHR11527:SF36. PTHR11527:SF36. 1 hit.
PfamiPF00525. Crystallin. 1 hit.
PF00011. HSP20. 1 hit.
[Graphical view]
PIRSFiPIRSF036514. Sm_HSP_B1. 1 hit.
PRINTSiPR00299. ACRYSTALLIN.
SUPFAMiSSF49764. SSF49764. 1 hit.
PROSITEiPS01031. HSP20. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

P68281-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MDVTIQHPWF KRALGPFYPS RLFDQFFGEG LFEYDLLPFL SSTISPYYRQ
60 70 80 90 100
SLFRTVLDSG ISEVRSDRDK FVIFLDVKHF SPEDLTVKVQ EDFVEIHGKH
110 120 130 140 150
NERQDDHGYI SREFHRRYRL PSNVDQSALS CSLSADGMLT FSGPKVQSGL
160 170
DAGHSERAIP VSREEKPSSA PSS
Length:173
Mass (Da):19,807
Last modified:July 21, 1986 - v1
Checksum:i6D8BE3E147B33A5C
GO

Sequence databases

PIRiA02894. CYGPAA.
RefSeqiXP_005001048.1. XM_005000991.2.

Genome annotation databases

EnsembliENSCPOT00000027446; ENSCPOP00000017479; ENSCPOG00000004350.
GeneIDi100135506.

Cross-referencesi

Sequence databases

PIRiA02894. CYGPAA.
RefSeqiXP_005001048.1. XM_005000991.2.

3D structure databases

ProteinModelPortaliP68281.
SMRiP68281.
ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsembliENSCPOT00000027446; ENSCPOP00000017479; ENSCPOG00000004350.
GeneIDi100135506.

Organism-specific databases

CTDi1409.

Phylogenomic databases

GeneTreeiENSGT00760000119238.
HOGENOMiHOG000233954.
HOVERGENiHBG054766.
InParanoidiP68281.

Family and domain databases

Gene3Di2.60.40.790. 1 hit.
InterProiIPR002068. A-crystallin/Hsp20_dom.
IPR001436. Alpha-crystallin/HSP.
IPR012274. Alpha-crystallin_A.
IPR003090. Alpha-crystallin_N.
IPR031107. HSP20.
IPR008978. HSP20-like_chaperone.
[Graphical view]
PANTHERiPTHR11527. PTHR11527. 1 hit.
PTHR11527:SF36. PTHR11527:SF36. 1 hit.
PfamiPF00525. Crystallin. 1 hit.
PF00011. HSP20. 1 hit.
[Graphical view]
PIRSFiPIRSF036514. Sm_HSP_B1. 1 hit.
PRINTSiPR00299. ACRYSTALLIN.
SUPFAMiSSF49764. SSF49764. 1 hit.
PROSITEiPS01031. HSP20. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiCRYAA_CAVPO
AccessioniPrimary (citable) accession number: P68281
Secondary accession number(s): P02491
Entry historyi
Integrated into UniProtKB/Swiss-Prot: July 21, 1986
Last sequence update: July 21, 1986
Last modified: November 2, 2016
This is version 59 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Direct protein sequencing, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.