Seroatlas · Human Serome Atlas

AOC2

Amine oxidase [copper-containing] 2

Also known as: AOC2_HUMAN, DAO2, RAO

Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene

Protein identityUniProt · HPA

UniProt accession
O75106
Gene
AOC2
Ensembl
ENSG00000131480
Chromosome
17
Canonical length
756 aa
Protein class
Enzymes, Metabolic proteins, Predicted intracellular proteins
Quaternary structure
Homodimer

OverviewNCBI Gene

Copper amine oxidases catalyze the oxidative conversion of amines to aldehydes and ammonia in the presence of copper and quinone cofactor. This gene shows high sequence similarity to copper amine oxidases from various species ranging from bacteria to mammals. The protein contains several conserved motifs including the active site of amine oxidases and the histidine residues that likely bind copper. It may be a critical modulator of signal transmission in retina, possibly by degrading the biogenic amines dopamine, histamine, and putrescine. This gene may be a candidate gene for hereditary ocular diseases. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Jul 2008]

Canonical amino-acid sequenceUniProt

756 residues, UniProt reviewed canonical sequence.

>O75106|AOC2
     1  MHLKIVLAFL ALSLITIFAL AYVLLTSPGG SSQPPHCPSV SHRAQPWPHP GQSQLFADLS
    61  REELTAVMRF LTQRLGPGLV DAAQAQPSDN CIFSVELQLP PKAAALAHLD RGSPPPAREA
   121  LAIVLFGGQP QPNVSELVVG PLPHPSYMRD VTVERHGGPL PYHRRPVLRA EFTQMWRHLK
   181  EVELPKAPIF LSSTFNYNGS TLAAVHATPR GLRSGDRATW MALYHNISGV GLFLHPVGLE
   241  LLLDHRALDP AHWTVQQVFY LGHYYADLGQ LEREFKSGRL EVVRVPLPPP NGASSLRSRN
   301  SPGPLPPLQF SPQGSQYSVQ GNLVVSSLWS FTFGHGVFSG LRIFDVRFQG ERIAYEVSVQ
   361  ECVSIYGADS PKTMLTRYLD SSFGLGRNSR GLVRGVDCPY QATMVDIHIL VGKGAVQLLP
   421  GAVCVFEEAQ GLPLRRHHNY LQNHFYGGLA SSALVVRSVS SVGNYDYIWD FVLYPNGALE
   481  GRVHATGYIN TAFLKGGEEG LLFGNRVGER VLGTVHTHAF HFKLDLDVAG LKNWVVAEDV
   541  VFKPVAAPWN PEHWLQRPQL TRQVLGKEDL TAFSLGSPLP RYLYLASNQT NAWGHQRGYR
   601  IQIHSPLGIH IPLESDMERA LSWGRYQLVV TQRKEEESQS SSIYHQNDIW TPTVTFADFI
   661  NNETLLGEDL VAWVTASFLH IPHAEDIPNT VTLGNRVGFL LRPYNFFDED PSIFSPGSVY
   721  FEKGQDAGLC SINPVACLPD LAACVPDLPP FSYHGF

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against AOC2 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
1
Mean surface accessibility (rSASA)
0.25
Highest tissue expression
5.5 nTPM

Expression across tissuesHPA

Tissue

  • adipose tissue: 5.5 nTPM
  • testis: 4.6 nTPM
  • liver: 3.3 nTPM
  • cerebellum: 2.7 nTPM
  • breast: 2.6 nTPM
  • basal ganglia: 2.4 nTPM

Single-cell type

  • early spermatids: 37 nCPM
  • late spermatids: 8.5 nCPM
  • neutrophils: 6 nCPM
  • adipocytes: 5.1 nCPM
  • corticotrophs: 5.1 nCPM
  • endometrial glandular cells: 4 nCPM

Immune cell

  • neutrophil: 1.1 nTPM
  • eosinophil: 0.2 nTPM
  • MAIT T-cell: 0.1 nTPM
  • basophil: 0 nTPM
  • classical monocyte: 0 nTPM
  • gdT-cell: 0 nTPM

Brain region

  • cerebral cortex: 5.8 nTPM
  • hippocampal formation: 5.2 nTPM
  • basal ganglia: 4.8 nTPM
  • hypothalamus: 4.7 nTPM
  • pons: 4.7 nTPM
  • white matter: 4.3 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)
1.25
gnomAD pLI
0
gnomAD missense Z
-1.22
DepMap mean gene effect
-0.11
DepMap dependency class
selective

Cancer expressionTCGA

Across TCGA tumor cohorts, this protein is over-expressed in roughly 4% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).

OntologyGO

Biological processes

Molecular functions

Cellular components

Protein domainsUniProt · Pfam · InterPro

KeywordsUniProt

Antibody and autoantibody relevanceSeroatlas analysis

Seroatlas reads AOC2 as an antibody target. Whether an autoantibody or antibody against AOC2 could matter depends on whether native AOC2 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

AOC2 is annotated at the cell surface, where native AOC2 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 AOC2 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/AOC2. Study-independent annotations aggregated from UniProt, Human Protein Atlas, PubMed, IEDB, Pfam, InterPro, Gene Ontology, AlphaFold, gnomAD, DepMap, ClinVar, TCGA. Catalog release seroatlas-reviewed-human-uniprot-20260313.

Seroatlas is the reference for exploring autoantibody and antibody serology at the human-protein level: the autoreactome and human serome, multiplex serology (HuProt, HuScan, VirScan, PhIP-Seq).

Loading the interactive Seroatlas protein explorer...