ATP synthase subunit b, mitochondrial is an enzyme that in humans is encoded by the ATP5PB gene.[5][6]

AliasesATP5PB, PIG47, ATP synthase, H+ transporting, mitochondrial Fo complex subunit B1, ATP synthase peripheral stalk-membrane subunit b, ATP5F1
External IDsMGI: 1100495 HomoloGene: 1275 GeneCards: ATP5PB
Gene location (Human)
Chromosome 1 (human)
Chr.Chromosome 1 (human)[1]
Chromosome 1 (human)
Genomic location for ATP5PB
Genomic location for ATP5PB
Band1p13.2Start111,448,864 bp[1]
End111,462,773 bp[1]
RNA expression pattern
PBB GE ATP5F1 211755 s at fs.png
More reference expression data
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC)Chr 1: 111.45 – 111.46 MbChr 3: 105.94 – 105.96 Mb
PubMed search[3][4]
View/Edit HumanView/Edit Mouse
PDB 1l2p EBI.jpg
atp synthase b subunit dimerization domain
Pfam clanCL0255

This gene encodes a subunit of mitochondrial ATP synthase. Mitochondrial ATP synthase catalyzes ATP synthesis, utilizing an electrochemical gradient of protons across the inner membrane during oxidative phosphorylation. ATP synthase is composed of two linked multi-subunit complexes: the soluble catalytic core, F1, and the membrane-spanning component, Fo, comprising the proton channel. The catalytic portion of mitochondrial ATP synthase consists of 5 different subunits (alpha, beta, gamma, delta, and epsilon) assembled with a stoichiometry of 3 alpha, 3 beta, and a single representative of the other 3. The proton channel seems to have nine subunits (a, b, c, d, e, f, g, F6 and 8). This gene encodes the b subunit of the proton channel.[6]

The b subunits are part of the peripheral stalk that links the F1 and FO complexes together, and which acts as a stator to prevent certain subunits from rotating with the central rotary element. The peripheral stalk differs in subunit composition between mitochondrial, chloroplast and bacterial F-ATPases. In bacterial and chloroplast F-ATPases, the peripheral stalk is composed of one copy of the delta subunit (homologous to OSCP in mitochondria), and two copies of subunit b in bacteria, or one copy each of subunits b and b' in chloroplasts and photosynthetic bacteria.[7]


  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000116459 - Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000000563 - Ensembl, May 2017
  3. ^ "Human PubMed Reference:".
  4. ^ "Mouse PubMed Reference:".
  5. ^ Higuti T, Tsurumi C, Osaka F, Kawamura Y, Tsujita H, Yoshihara Y, Tani I, Tanaka K, Ichihara A (Sep 1991). "Molecular cloning of cDNA for the import precursor of human subunit B of H(+)-ATP synthase in mitochondria". Biochem Biophys Res Commun. 178 (3): 1014–20. doi:10.1016/0006-291X(91)90993-H. PMID 1831354.
  6. ^ a b "Entrez Gene: ATP5PB ATP synthase peripheral stalk-membrane subunit b".
  7. ^ Carbajo RJ, Kellas FA, Runswick MJ, Montgomery MG, Walker JE, Neuhaus D (August 2005). "Structure of the F1-binding domain of the stator of bovine F1Fo-ATPase and how it binds an alpha-subunit". J. Mol. Biol. 351 (4): 824–38. doi:10.1016/j.jmb.2005.06.012. PMID 16045926.

External linksEdit

Further readingEdit

This article incorporates text from the public domain Pfam and InterPro: IPR002146