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Protein

Single-stranded DNA cytosine deaminase

Gene

AICDA

Organism
Canis lupus familiaris (Dog) (Canis familiaris)
Status
Reviewed-Annotation score: Annotation score: 4 out of 5-Experimental evidence at transcript leveli

Functioni

Single-stranded DNA-specific cytidine deaminase. Involved in somatic hypermutation, gene conversion, and class-switch recombination in B-lymphocytes. Required for several crucial steps of B-cell terminal differentiation necessary for efficient antibody responses. May also play a role in the epigenetic regulation of gene expression by participating in DNA demethylation (By similarity).By similarity

Catalytic activityi

Cytosine in single-stranded DNA + H2O = uracil in single-stranded DNA + NH3.

Cofactori

Zn2+By similarity

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi56Zinc; catalyticBy similarity1
Active sitei58Proton donorBy similarity1
Metal bindingi87Zinc; catalyticBy similarity1
Metal bindingi90Zinc; catalyticBy similarity1

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Hydrolase

Keywords - Biological processi

mRNA processing

Keywords - Ligandi

Metal-binding, Zinc

Names & Taxonomyi

Protein namesi
Recommended name:
Single-stranded DNA cytosine deaminase (EC:3.5.4.38)
Alternative name(s):
Activation-induced cytidine deaminase
Cytidine aminohydrolase
Gene namesi
Name:AICDA
Synonyms:AID
OrganismiCanis lupus familiaris (Dog) (Canis familiaris)
Taxonomic identifieri9615 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaLaurasiatheriaCarnivoraCaniformiaCanidaeCanis
Proteomesi
  • UP000002254 Componenti: Unplaced

Subcellular locationi

  • Nucleus By similarity
  • Cytoplasm By similarity

  • Note: Predominantly cytoplasmic but shuttles between the nucleus and the cytoplasm.By similarity

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Cytoplasm, Nucleus

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001716861 – 198Single-stranded DNA cytosine deaminaseAdd BLAST198

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei27Phosphothreonine; by PKABy similarity1
Modified residuei38Phosphoserine; by PKABy similarity1

Post-translational modificationi

Ser-38 is the major site whereas Thr-27 is the minor site of phosphorylation. Phosphorylation regulates its class-switch recombination activity (By similarity).By similarity
Probably monoubiquitinated on several residues by RNF126.By similarity

Keywords - PTMi

Phosphoprotein, Ubl conjugation

Proteomic databases

PaxDbiQ75W64.

Expressioni

Tissue specificityi

Expressed in thymus, lung, spleen, kidney, small intestine, lymph node and tonsil.1 Publication

Interactioni

Subunit structurei

Interacts with CTNNBL1; the interaction is important for the immunoglobulin switch activity of AICDA. Interacts (via its NLS) with KPNA1. Interacts with PKA/PRKACA and PRKAR1A/PKR1. Interacts with SUPT6H, TRIM28 and NCL.By similarity

Protein-protein interaction databases

STRINGi9615.ENSCAFP00000020480.

Structurei

3D structure databases

ProteinModelPortaliQ75W64.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini23 – 129CMP/dCMP-type deaminasePROSITE-ProRule annotationAdd BLAST107

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni2 – 26Interaction with SUPT6HBy similarityAdd BLAST25
Regioni39 – 42Important for interaction with CTNNBL1By similarity4
Regioni88 – 116Required for interaction with RNF126By similarityAdd BLAST29

Motif

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Motifi1 – 30Nuclear localization signalBy similarityAdd BLAST30
Motifi183 – 198Nuclear export signalBy similarityAdd BLAST16

Sequence similaritiesi

Contains 1 CMP/dCMP-type deaminase domain.PROSITE-ProRule annotation

Phylogenomic databases

eggNOGiENOG410IFHW. Eukaryota.
ENOG4111HYQ. LUCA.
HOGENOMiHOG000033754.
HOVERGENiHBG050434.
InParanoidiQ75W64.
KOiK10989.

Family and domain databases

InterProiIPR016192. APOBEC/CMP_deaminase_Zn-bd.
IPR013158. APOBEC_N.
IPR002125. CMP_dCMP_Zn-bd.
IPR016193. Cytidine_deaminase-like.
[Graphical view]
PfamiPF08210. APOBEC_N. 1 hit.
[Graphical view]
SUPFAMiSSF53927. SSF53927. 1 hit.
PROSITEiPS00903. CYT_DCMP_DEAMINASES_1. 1 hit.
PS51747. CYT_DCMP_DEAMINASES_2. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Q75W64-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MDSLLMKQRK FLYHFKNVRW AKGRHETYLC YVVKRRDSAT SFSLDFGHLR
60 70 80 90 100
NKSGCHVELL FLRYISDWDL DPGRCYRVTW FTSWSPCYDC ARHVADFLRG
110 120 130 140 150
YPNLSLRIFA ARLYFCEDRK AEPEGLRRLH RAGVQIAIMT FKDYFYCWNT
160 170 180 190
FVENREKTFK AWEGLHENSV RLSRQLRRIL LPLYEVDDLR DAFRTLGL
Length:198
Mass (Da):23,887
Last modified:July 5, 2004 - v1
Checksum:i4BE00D9B9D1550D2
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AB122019 mRNA. Translation: BAD15112.1.
RefSeqiNP_001003380.1. NM_001003380.1.
UniGeneiCfa.4560.

Genome annotation databases

GeneIDi442983.
KEGGicfa:442983.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AB122019 mRNA. Translation: BAD15112.1.
RefSeqiNP_001003380.1. NM_001003380.1.
UniGeneiCfa.4560.

3D structure databases

ProteinModelPortaliQ75W64.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi9615.ENSCAFP00000020480.

Proteomic databases

PaxDbiQ75W64.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

GeneIDi442983.
KEGGicfa:442983.

Organism-specific databases

CTDi57379.

Phylogenomic databases

eggNOGiENOG410IFHW. Eukaryota.
ENOG4111HYQ. LUCA.
HOGENOMiHOG000033754.
HOVERGENiHBG050434.
InParanoidiQ75W64.
KOiK10989.

Family and domain databases

InterProiIPR016192. APOBEC/CMP_deaminase_Zn-bd.
IPR013158. APOBEC_N.
IPR002125. CMP_dCMP_Zn-bd.
IPR016193. Cytidine_deaminase-like.
[Graphical view]
PfamiPF08210. APOBEC_N. 1 hit.
[Graphical view]
SUPFAMiSSF53927. SSF53927. 1 hit.
PROSITEiPS00903. CYT_DCMP_DEAMINASES_1. 1 hit.
PS51747. CYT_DCMP_DEAMINASES_2. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiAICDA_CANLF
AccessioniPrimary (citable) accession number: Q75W64
Entry historyi
Integrated into UniProtKB/Swiss-Prot: April 26, 2005
Last sequence update: July 5, 2004
Last modified: September 7, 2016
This is version 77 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, 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.