Protein-coding gene in the species Homo sapiens
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.[ 5] [ 6] [ 7]
The COA3 gene is located on the q arm of chromosome 17 at position 21.2 and it spans 1,107 base pairs.[ 7] COA3 gene produces a 7.8 kDa protein composed of 71 amino acids .[ 8] [ 9] translation regulation assembly intermediate of cytochrome c oxidase complex) complex, and the structure contains a C-terminal coiled-coil domain as well as a central single pass transmembrane domain.[ 10]
The COA3 gene encodes for a Core protein of the MITRAC (mitochondrial translation regulation assembly intermediate of cytochrome c oxidase complex) complex. The MITRAC complex is essential in the assembly of cytochrome c oxidase (complex IV) of the mitochondrial respiratory chain , which is responsible for the catalysis of oxidation of cytochrome c by molecular oxygen .[ 11] translation of mitochondrial encoded components and assembly of nuclear -encoded components imported in mitochondrion. In addition, COA3 is required for efficient translation of MT-CO1 and assembly of the mitochondrial respiratory chain complex IV .[ 5] [ 6]
Clinical significance [ edit ] Variants of COA3 have been associated with the mitochondrial Complex IV deficiency, a deficiency in an enzyme complex of the mitochondrial respiratory chain which catalyzes the oxidation of cytochrome c utilizing molecular oxygen .[ 11] heterogeneous phenotypes ranging from isolated myopathy to severe multisystem disease affecting several tissues and organs. Other Clinical Manifestations include hypertrophic cardiomyopathy , hepatomegaly and liver dysfunction , hypotonia , muscle weakness , exercise intolerance , developmental delay , delayed motor development and mental retardation .[ 12] COA3 gene has been found to result in a severe decrease in protein levels with symptoms of exercise intolerance and peripheral neuropathy .[ 11]
Like COX14 , COA3 is a key component of the MITRAC (mitochondrial translation regulation assembly intermediate of cytochrome c oxidase complex) complex.[ 13] MT-CO1 , COX1 , SMIM20 , SURF1 , TIMM21 , and others.[ 14] [ 5]
^ a b c GRCh38: Ensembl release 89: ENSG00000183978 – Ensembl , May 2017^ a b c GRCm38: Ensembl release 89: ENSMUSG00000017188 – Ensembl , May 2017^ "Human PubMed Reference:" . National Center for Biotechnology Information, U.S. National Library of Medicine .^ "Mouse PubMed Reference:" . National Center for Biotechnology Information, U.S. National Library of Medicine .^ a b c "COA3 - Cytochrome c oxidase assembly factor 3 homolog, mitochondrial - Homo sapiens (Human) - COA3 gene & protein" . Retrieved 2018-08-07 .text available under the CC BY 4.0 license.^ a b "UniProt: the universal protein knowledgebase" . Nucleic Acids Research . 45 (D1): D158–D169. January 2017. doi :10.1093/nar/gkw1099 . PMC 5210571 PMID 27899622 .^ a b "Entrez Gene: Cytochrome c oxidase assembly factor 3" . Retrieved 2018-08-07 .^ Zong NC, Li H, Li H, Lam MP, Jimenez RC, Kim CS, Deng N, Kim AK, Choi JH, Zelaya I, Liem D, Meyer D, Odeberg J, Fang C, Lu HJ, Xu T, Weiss J, Duan H, Uhlen M, Yates JR, Apweiler R, Ge J, Hermjakob H, Ping P (October 2013). "Integration of cardiac proteome biology and medicine by a specialized knowledgebase" . Circulation Research . 113 (9): 1043–53. doi :10.1161/CIRCRESAHA.113.301151 . PMC 4076475 PMID 23965338 . ^ "Cytochrome c oxidase assembly factor 3 homolog, mitochondrial" . Cardiac Organellar Protein Atlas Knowledgebase (COPaKB) . Archived from the original on 2018-08-08. Retrieved 2018-08-07 .^ Peralta S, Clemente P, Sánchez-Martínez A, Calleja M, Hernández-Sierra R, Matsushima Y, Adán C, Ugalde C, Fernández-Moreno MÁ, Kaguni LS, Garesse R (July 2012). "Coiled coil domain-containing protein 56 (CCDC56) is a novel mitochondrial protein essential for cytochrome c oxidase function" . The Journal of Biological Chemistry . 287 (29): 24174–85. doi :10.1074/jbc.M112.343764 PMC 3397844 PMID 22610097 . ^ a b c
Ostergaard E, Weraarpachai W, Ravn K, Born AP, Jønson L, Duno M, Wibrand F, Shoubridge EA, Vissing J (March 2015). "Mutations in COA3 cause isolated complex IV deficiency associated with neuropathy, exercise intolerance, obesity, and short stature". Journal of Medical Genetics . 52 (3): 203–7. doi :10.1136/jmedgenet-2014-102914 . PMID 25604084 . S2CID 43018915 .
^ "Mitochondrial complex IV deficiency" . www.uniprot.org .^
Mick DU, Dennerlein S, Wiese H, Reinhold R, Pacheu-Grau D, Lorenzi I, Sasarman F, Weraarpachai W, Shoubridge EA, Warscheid B, Rehling P (December 2012). "MITRAC links mitochondrial protein translocation to respiratory-chain assembly and translational regulation" . Cell . 151 (7): 1528–41. doi :10.1016/j.cell.2012.11.053 hdl :11858/00-001M-0000-000E-DDDF-4 PMID 23260140 .
^ Dennerlein S, Oeljeklaus S, Jans D, Hellwig C, Bareth B, Jakobs S, Deckers M, Warscheid B, Rehling P (September 2015). "MITRAC7 Acts as a COX1-Specific Chaperone and Reveals a Checkpoint during Cytochrome c Oxidase Assembly" . Cell Reports . 12 (10): 1644–55. doi :10.1016/j.celrep.2015.08.009 hdl :11858/00-001M-0000-0028-466E-C PMID 26321642 .
Szklarczyk R, Wanschers BF, Cuypers TD, Esseling JJ, Riemersma M, van den Brand MA, Gloerich J, Lasonder E, van den Heuvel LP, Nijtmans LG, Huynen MA (February 2012). "Iterative orthology prediction uncovers new mitochondrial proteins and identifies C12orf62 as the human ortholog of COX14, a protein involved in the assembly of cytochrome c oxidase" . Genome Biology . 13 (2): R12. doi :10.1186/gb-2012-13-2-r12 PMC 3334569 PMID 22356826 . Clemente P, Peralta S, Cruz-Bermudez A, Echevarría L, Fontanesi F, Barrientos A, Fernandez-Moreno MA, Garesse R (March 2013). "hCOA3 stabilizes cytochrome c oxidase 1 (COX1) and promotes cytochrome c oxidase assembly in human mitochondria" . The Journal of Biological Chemistry . 288 (12): 8321–31. doi :10.1074/jbc.M112.422220 PMC 3605650 PMID 23362268 . Ban-Ishihara R, Tomohiro-Takamiya S, Tani M, Baudier J, Ishihara N, Kuge O (October 2015). "COX assembly factor ccdc56 regulates mitochondrial morphology by affecting mitochondrial recruitment of Drp1" . FEBS Letters . 589 (20 Pt B): 3126–32. doi :10.1016/j.febslet.2015.08.039 PMID 26358295 . S2CID 19505697 .
This article incorporates text from the United States National Library of Medicine , which is in the public domain .
This article incorporates text available under the CC BY 4.0 license.
