| COA3 | 
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| Identifiers | 
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| Aliases | COA3, CCDC56, MITRAC12, HSPC009, cytochrome c oxidase assembly factor 3, COX25, MC4DN14, hCOA3 | 
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| External IDs | OMIM: 614775; MGI: 1098757; HomoloGene: 69156; GeneCards: COA3; OMA:COA3 - orthologs | 
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| | Gene location (Mouse) | 
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 |  |  | Chr. | Chromosome 11 (mouse) | 
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 |  |  | Band | 11 D|11 64.56 cM | Start | 101,168,794 bp | 
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 | End | 101,169,940 bp | 
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| | RNA expression pattern | 
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 | Bgee | | Human | Mouse (ortholog) | 
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 | | Top expressed in |  | mucosa of transverse colon
 corpus epididymis
 renal medulla
 body of pancreas
 mucosa of sigmoid colon
 oral cavity
 duodenum
 body of stomach
 gums
 gingival epithelium
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 | | Top expressed in |  | facial motor nucleus
 anterior horn of spinal cord
 medullary collecting duct
 islet of Langerhans
 migratory enteric neural crest cell
 epithelium of stomach
 transitional epithelium of urinary bladder
 lobe of prostate
 medial ganglionic eminence
 crypt of lieberkuhn of small intestine
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 |  | More reference expression data | 
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 | BioGPS |  | 
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| Wikidata | 
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Cytochrome c oxidase assembly factor 3, also known as Coiled-coil domain-containing protein 56, or Mitochondrial translation regulation assembly intermediate of cytochrome c oxidase protein of 12 kDa is a protein that in humans is encoded by the COA3 gene. This gene encodes a member of the cytochrome c oxidase assembly factor family. Studies of a related gene in fly suggest that the encoded protein is localized to mitochondria and is essential for cytochrome c oxidase function.