ID   COX5B_SOLTU             Reviewed;          28 AA.
AC   P80499;
DT   01-FEB-1996, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-1996, sequence version 1.
DT   22-APR-2020, entry version 58.
DE   RecName: Full=Cytochrome c oxidase subunit 5B, mitochondrial;
DE   AltName: Full=Cytochrome c oxidase polypeptide Vb;
DE   Flags: Fragment;
OS   Solanum tuberosum (Potato).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   asterids; lamiids; Solanales; Solanaceae; Solanoideae; Solaneae; Solanum.
OX   NCBI_TaxID=4113;
RN   [1]
RP   PROTEIN SEQUENCE.
RC   TISSUE=Tuber;
RX   PubMed=8919912; DOI=10.1046/j.1365-313x.1996.09030357.x;
RA   Jansch L., Kruft V., Schmitz U.K., Braun H.P.;
RT   "New insights into the composition, molecular mass and stoichiometry of the
RT   protein complexes of plant mitochondria.";
RL   Plant J. 9:357-368(1996).
CC   -!- FUNCTION: Component of the cytochrome c oxidase, the last enzyme in the
CC       mitochondrial electron transport chain which drives oxidative
CC       phosphorylation. The respiratory chain contains 3 multisubunit
CC       complexes succinate dehydrogenase (complex II, CII), ubiquinol-
CC       cytochrome c oxidoreductase (cytochrome b-c1 complex, complex III,
CC       CIII) and cytochrome c oxidase (complex IV, CIV), that cooperate to
CC       transfer electrons derived from NADH and succinate to molecular oxygen,
CC       creating an electrochemical gradient over the inner membrane that
CC       drives transmembrane transport and the ATP synthase. Cytochrome c
CC       oxidase is the component of the respiratory chain that catalyzes the
CC       reduction of oxygen to water. Electrons originating from reduced
CC       cytochrome c in the intermembrane space (IMS) are transferred via the
CC       dinuclear copper A center (CU(A)) of subunit 2 and heme A of subunit 1
CC       to the active site in subunit 1, a binuclear center (BNC) formed by
CC       heme A3 and copper B (CU(B)). The BNC reduces molecular oxygen to 2
CC       water molecules using 4 electrons from cytochrome c in the IMS and 4
CC       protons from the mitochondrial matrix. {ECO:0000250|UniProtKB:P04037}.
CC   -!- PATHWAY: Energy metabolism; oxidative phosphorylation.
CC       {ECO:0000250|UniProtKB:P04037}.
CC   -!- SUBUNIT: Component of the cytochrome c oxidase (complex IV, CIV), a
CC       multisubunit enzyme composed of a catalytic core of 3 subunits and
CC       several supernumerary subunits. The complex exists as a monomer or a
CC       dimer and forms supercomplexes (SCs) in the inner mitochondrial
CC       membrane with ubiquinol-cytochrome c oxidoreductase (cytochrome b-c1
CC       complex, complex III, CIII). {ECO:0000250|UniProtKB:P04037}.
CC   -!- SUBCELLULAR LOCATION: Mitochondrion inner membrane
CC       {ECO:0000250|UniProtKB:P04037}; Peripheral membrane protein
CC       {ECO:0000250|UniProtKB:P04037}; Matrix side
CC       {ECO:0000250|UniProtKB:P04037}.
CC   -!- SIMILARITY: Belongs to the cytochrome c oxidase subunit 5B family.
CC       {ECO:0000305}.
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DR   UniPathway; UPA00705; -.
DR   Proteomes; UP000011115; Unassembled WGS sequence.
DR   GO; GO:0005743; C:mitochondrial inner membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0006119; P:oxidative phosphorylation; IEA:UniProtKB-UniPathway.
PE   1: Evidence at protein level;
KW   Direct protein sequencing; Membrane; Mitochondrion;
KW   Mitochondrion inner membrane; Reference proteome.
FT   CHAIN           1..>28
FT                   /note="Cytochrome c oxidase subunit 5B, mitochondrial"
FT                   /id="PRO_0000197029"
FT   NON_TER         28
SQ   SEQUENCE   28 AA;  3103 MW;  1EAFA79E2682849C CRC64;
     TVSENVVKKV EDVMPIATGH EREXLXAQ