AOC1
Diamine oxidase [copper-containing]
Also known as: ABP, ABP1, AOC1_HUMAN, DAO
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- P19801
- Gene
- AOC1
- Ensembl
- ENSG00000002726
- Chromosome
- 7
- Canonical length
- 751 aa
- Protein class
- Enzymes, Metabolic proteins, Predicted secreted proteins
- Secretome location
- Secreted in other tissues
- Quaternary structure
- Homodimer
OverviewNCBI Gene
This gene encodes a metal-binding membrane glycoprotein that oxidatively deaminates putrescine, histamine, and related compounds. The encoded protein is inhibited by amiloride, a diuretic that acts by closing epithelial sodium ion channels. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Jan 2013]
Canonical amino-acid sequenceUniProt
751 residues, UniProt reviewed canonical sequence.
>P19801|AOC1
1 MPALGWAVAA ILMLQTAMAE PSPGTLPRKA GVFSDLSNQE LKAVHSFLWS KKELRLQPSS
61 TTTMAKNTVF LIEMLLPKKY HVLRFLDKGE RHPVREARAV IFFGDQEHPN VTEFAVGPLP
121 GPCYMRALSP RPGYQSSWAS RPISTAEYAL LYHTLQEATK PLHQFFLNTT GFSFQDCHDR
181 CLAFTDVAPR GVASGQRRSW LIIQRYVEGY FLHPTGLELL VDHGSTDAGH WAVEQVWYNG
241 KFYGSPEELA RKYADGEVDV VVLEDPLPGG KGHDSTEEPP LFSSHKPRGD FPSPIHVSGP
301 RLVQPHGPRF RLEGNAVLYG GWSFAFRLRS SSGLQVLNVH FGGERIAYEV SVQEAVALYG
361 GHTPAGMQTK YLDVGWGLGS VTHELAPGID CPETATFLDT FHYYDADDPV HYPRALCLFE
421 MPTGVPLRRH FNSNFKGGFN FYAGLKGQVL VLRTTSTVYN YDYIWDFIFY PNGVMEAKMH
481 ATGYVHATFY TPEGLRHGTR LHTHLIGNIH THLVHYRVDL DVAGTKNSFQ TLQMKLENIT
541 NPWSPRHRVV QPTLEQTQYS WERQAAFRFK RKLPKYLLFT SPQENPWGHK RTYRLQIHSM
601 ADQVLPPGWQ EEQAITWARY PLAVTKYRES ELCSSSIYHQ NDPWHPPVVF EQFLHNNENI
661 ENEDLVAWVT VGFLHIPHSE DIPNTATPGN SVGFLLRPFN FFPEDPSLAS RDTVIVWPRD
721 NGPNYVQRWI PEDRDCSMPP PFSYNGTYRP VLocalizationUniProt · AlphaFold · HPA
Whether an antibody against AOC1 can act on the native protein depends on physical access: surface and secreted proteins are reachable by circulating antibodies, intracellular proteins usually are not.
- Antibody reachability
- Cell surface
- Secreted
- No
- Transmembrane segments
- 0
- Mean surface accessibility (rSASA)
- 0.25
- Highest tissue expression
- 467 nTPM
Expression across tissuesHPA
Tissue
- placenta: 467 nTPM
- small intestine: 214 nTPM
- duodenum: 173 nTPM
- colon: 133 nTPM
- kidney: 128 nTPM
- rectum: 88 nTPM
Single-cell type
- enterocytes: 940 nCPM
- colonocytes: 367 nCPM
- tuft cells: 173 nCPM
- extravillous trophoblasts: 129 nCPM
- goblet cells: 120 nCPM
- renal collecting duct principal cells: 100 nCPM
Immune cell
- eosinophil: 31 nTPM
- neutrophil: 2.5 nTPM
- myeloid DC: 1.4 nTPM
- basophil: 0.2 nTPM
- classical monocyte: 0.1 nTPM
- intermediate monocyte: 0.1 nTPM
Brain region
- thalamus: 2.3 nTPM
- medulla oblongata: 2.1 nTPM
- midbrain: 2.1 nTPM
- white matter: 2 nTPM
- choroid plexus: 1.8 nTPM
- pons: 1.8 nTPM
Genetic constraint and essentialitygnomAD · DepMap
Does the body need this protein intact? Low LOEUF or a strong DepMap dependency means loss or blockade of the protein is likely to be felt.
- gnomAD LOEUF (loss-of-function intolerance)
- 0.97
- gnomAD pLI
- 0
- gnomAD missense Z
- 0.76
- DepMap mean gene effect
- -0.05
- DepMap dependency class
- selective
Cancer expressionTCGA
Across TCGA tumor cohorts, this protein is over-expressed in roughly 3% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).
OntologyGO
Biological processes
- putrescine metabolic process
Molecular functions
- calcium ion binding
- copper ion binding
- heparin binding
- primary methylamine oxidase activity
- protein homodimerization activity
- quinone binding
- diamine oxidase activity
- histamine oxidase activity
- putrescine oxidase activity
Cellular components
Protein domainsUniProt · Pfam · InterPro
- Copper amine oxidase
- Copper amine oxidase, catalytic domain
- Copper amine oxidase, N2-terminal
- Copper amine oxidase, N3-terminal
- Copper amine oxidase, N-terminal
- Copper amine oxidase, catalytic domain superfamily
- Copper amine oxidase, copper-binding site
- Copper amine oxidase, TPQ-binding site
- Copper amine oxidase, enzyme domain
- Copper amine oxidase, N2 domain
- Copper amine oxidase, N3 domain
KeywordsUniProt
Antibody and autoantibody relevanceSeroatlas analysis
Seroatlas reads AOC1 as an antibody target. Whether an autoantibody or antibody against AOC1 could matter depends on whether native AOC1 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
AOC1 is annotated at the cell surface, where native AOC1 is exposed to circulating antibodies and is a prime autoantibody target that could block, deplete, or overstimulate it.
Annotation status
The present source text does not explicitly label AOC1 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
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