ATP synthase subunit beta (ATP5B)

ATP synthase subunit beta is the core catalytic subunit of the F₁ sector of F-type ATP synthase, a multi-subunit enzyme complex embedded in the inner mitochondrial membrane (also found in bacteria and chloroplasts)[2][6][7][8]. The complex consists of two major regions: F₁ (catalytic, in the mitochondrial matrix or bacterial cytoplasm) and F₀ (proton channel, spans the membrane)[2][9]. The F₁ sector contains three alpha and three beta subunits arranged alternately; the beta subunit hosts the main nucleotide (ATP/ADP) binding sites and drives ATP synthesis by alternating between open, loose, and tight conformations during rotation[1][2][5]. It is essential for cellular energy production through oxidative phosphorylation. Mutations or dysfunction lead to defects in energy metabolism and are implicated in various diseases, especially those involving tissues with high energy demands[1][3][7]. Caveats: - Drug targeting typically exploits differences between pathogen and host (human) ATP synthase. - Direct human therapeutic targeting is largely limited by toxicity, except in experimental or research contexts[4]. - “ATP synthase subunit beta” is a globally conserved, functionally essential enzyme subunit, not a receptor or channel.

Other names

ATP synthase F₁ complex catalytic subunit betaF-ATPase beta subunitF1-ATPase beta subunitATPSBATP5BAtp5f1bBeta subunit of F-type ATPase

Inhibitor binding to the F₀F₁-ATP synthase blocks proton flow or the catalytic rotation, thereby halting ATP synthesis.