Annotations: 8TX4

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF18782	APOBEC3, cytosine deaminase domain (APOBEC3)	APOBEC3, cytosine deaminase domain	This domain is found in APOBEC3 (A/B/C/D/F/G) proteins and is homologous to known CMP/dCMP-type deaminase domains. APOBEC3 proteins are a family of cytidine deaminases that play a crucial role in the host's intrinsic immunity by restricting the repli ...	This domain is found in APOBEC3 (A/B/C/D/F/G) proteins and is homologous to known CMP/dCMP-type deaminase domains. APOBEC3 proteins are a family of cytidine deaminases that play a crucial role in the host's intrinsic immunity by restricting the replication of viruses - particularly retroviruses like HIV-1 - and inhibiting the transposition of endogenous elements such as LINE-1. In humans, there are seven APOBEC3 genes: A3A, A3B, A3C, A3D, A3F, A3G, and A3H, all located on chromosome 22. Each protein contains one or two zinc-binding domains, which are essential for their catalytic activity - the conversion of cytosine to uracil in single-stranded DNA, and sometimes RNA [1,2].	Domain
A	PF18750	Secreted Novel AID/APOBEC-like Deaminase 4 (SNAD4)	Secreted Novel AID/APOBEC-like Deaminase 4	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B	DNA 22-mer with (5'-D(PTPGPAPTP*TP)-3')	-	-	-
A	DNA dC->dU-editing enzyme APOBEC-3G	hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in cyclic amidines cytidine deaminase activity hydrolase activity catalytic activity deaminase activity hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds cation binding transition metal ion binding zinc ion binding ion binding binding metal ion binding small molecule binding RNA binding hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in cyclic amidines cytidine deaminase activity hydrolase activity catalytic activity deaminase activity hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds cation binding transition metal ion binding zinc ion binding ion binding binding metal ion binding small molecule binding RNA binding nucleic acid binding	DNA cytosine deamination primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process DNA deamination DNA modification macromolecule modification metabolic process cellular process macromolecule metabolic process regulation of cellular process negative regulation of biological process negative regulation of cellular process DNA cytosine deamination primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process DNA deamination DNA modification macromolecule modification metabolic process cellular process macromolecule metabolic process regulation of cellular process negative regulation of biological process negative regulation of cellular process negative regulation of macromolecule metabolic process retrotransposition regulation of biosynthetic process regulation of biological process negative regulation of metabolic process biological regulation regulation of macromolecule metabolic process gene expression transposition macromolecule biosynthetic process regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process transposable element silencing regulation of macromolecule biosynthetic process regulation of metabolic process cytidine to uridine editing RNA metabolic process RNA modification base conversion or substitution editing biological process involved in interspecies interaction between organisms response to stimulus immune response response to other organism defense response defense response to symbiont response to external stimulus response to biotic stimulus immune system process defense response to other organism response to stress innate immune response response to external biotic stimulus regulation of single stranded viral RNA replication via double stranded DNA intermediate viral life cycle negative regulation of single stranded viral RNA replication via double stranded DNA intermediate negative regulation of RNA biosynthetic process regulation of primary metabolic process RNA biosynthetic process nucleic acid biosynthetic process regulation of RNA metabolic process negative regulation of viral process viral RNA genome replication viral process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process negative regulation of viral genome replication nucleobase-containing compound biosynthetic process single stranded viral RNA replication via double stranded DNA intermediate regulation of viral process regulation of viral life cycle viral genome replication regulation of viral genome replication negative regulation of RNA metabolic process defense response to virus response to virus	intracellular anatomical structure cytoplasmic ribonucleoprotein granule intracellular membraneless organelle ribonucleoprotein granule intracellular organelle cellular anatomical structure organelle membraneless organelle cytoplasm supramolecular complex P-body protein-containing complex ribonucleoprotein complex membrane-bounded organelle intracellular anatomical structure cytoplasmic ribonucleoprotein granule intracellular membraneless organelle ribonucleoprotein granule intracellular organelle cellular anatomical structure organelle membraneless organelle cytoplasm supramolecular complex P-body protein-containing complex ribonucleoprotein complex membrane-bounded organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR050610	APOBEC Cytidine Deaminase	Family
A	IPR016193	Cytidine deaminase-like	Homologous Superfamily
A	IPR002125	Cytidine and deoxycytidylate deaminase domain	Domain
A	IPR016192	APOBEC/CMP deaminase, zinc-binding	Binding Site

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.