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COX5A

Chr 15q24.2

cytochrome c oxidase subunit 5A

Aliases:
COX-VA
MANE:
ENST00000322347.11

Annotations refreshed 1 month ago.

Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • Likely inborn error of metabolism

    BIALLELIC, autosomal or pseudoautosomal
  • Mitochondrial disorder with complex IV deficiency

    BIALLELIC, autosomal or pseudoautosomal
  • Mitochondrial disorders

    BIALLELIC, autosomal or pseudoautosomal
  • Possible mitochondrial disorder - nuclear genes

    BIALLELIC, autosomal or pseudoautosomal

Disease associations (Open Targets)

  • neurodegenerative disease

    0.54
  • mitochondrial complex IV deficiency, nuclear type 23

    0.53
  • mitochondrial complex IV deficiency, nuclear type 20

    0.50
  • autoimmune disorder of central nervous system

    0.45
  • Isolated cytochrome C oxidase deficiency

    0.37
  • stroke disorder

    0.27
  • alcohol drinking

    0.26
  • inborn mitochondrial metabolism disorder

    0.19
  • mitochondrial disease

    0.19
  • parasitic infectious disease

    0.17

Score is the Open Targets composite evidence score (0-1). Higher = stronger gene-disease association.

Protein function (UniProt)

Cytochrome c oxidase subunit 5A, mitochondrial

Component of the cytochrome c oxidase, the last enzyme in the mitochondrial electron transport chain which drives oxidative phosphorylation. The respiratory chain contains 3 multisubunit complexes succinate dehydrogenase (complex II, CII), ubiquinol-cytochrome c oxidoreductase (cytochrome b-c1 complex, complex III, CIII) and cytochrome c oxidase (complex IV, CIV), that cooperate to transfer electrons derived from NADH and succinate to molecular oxygen, creating an electrochemical gradient over the inner membrane that drives transmembrane transport and the ATP synthase. Cytochrome c oxidase is the component of the respiratory chain that catalyzes the reduction of oxygen to water. Electrons originating from reduced cytochrome c in the intermembrane space (IMS) are transferred via the dinuclear copper A center (CU(A)) of subunit 2 and heme A of subunit 1 to the active site in subunit 1, a binuclear center (BNC) formed by heme A3 and copper B (CU(B)). The BNC reduces molecular oxygen to 2 water molecules using 4 electrons from cytochrome c in the IMS and 4 protons from the mitochondrial matrix

Curated MONDO disease pages that list COX5A among their top associated genes.

Data sources: HGNC (CC BY 4.0), AlphaFold (CC BY 4.0, Jumper et al. Nature 2021), Genomics England PanelApp (CC BY 4.0), ClinGen, Open Targets (CC0), UniProt.

Not for sole clinical decision-making. Always verify against primary sources.