S
IPR020003

ATPase, alpha/beta subunit, nucleotide-binding domain, active site

InterPro entry
Short nameATPase_a/bsu_AS

Description

Transmembrane ATPases are membrane-bound enzyme complexes/ion transporters that use ATP hydrolysis to drive the transport of protons across a membrane. Some transmembrane ATPases also work in reverse, harnessing the energy from a proton gradient, using the flux of ions across the membrane via the ATPase proton channel to drive the synthesis of ATP.

This group of proteins include the alpha and beta subunits found in the F1, V1, and A1 complexes of F-, V- and A-ATPases, respectively (sometimes called the A and B subunits in V- and A-ATPases), as well as Type 3 secretion system ATPase and Flagellum-specific ATP synthase.

This entry represents a 10 amino acid signature. The signature pattern contains two conserved serines. The first serine seems to be important for catalysis - in the ATPase alpha-chain at least - as its mutagenesis causes catalytic impairment.

References

1. The evolution of A-, F-, and V-type ATP synthases and ATPases: reversals in function and changes in the H+/ATP coupling ratio. Cross RL, Muller V. FEBS Lett. 576, 1-4, (2004). View articlePMID: 15473999

2. Mechanisms of ATPases--a multi-disciplinary approach. Rappas M, Niwa H, Zhang X. Curr. Protein Pept. Sci. 5, 89-105, (2004). View articlePMID: 15078220

3. Regulation and isoform function of the V-ATPases. Toei M, Saum R, Forgac M. Biochemistry 49, 4715-23, (2010). View articlePMID: 20450191

4. New insights into structure-function relationships between archeal ATP synthase (A1A0) and vacuolar type ATPase (V1V0). Gruber G, Marshansky V. Bioessays 30, 1096-109, (2008). View articlePMID: 18937357

5. F-type or V-type? The chimeric nature of the archaebacterial ATP synthase. Schafer G, Meyering-Vos M. Biochim. Biophys. Acta 1101, 232-5, (1992). PMID: 1385979

6. F-and V-ATPases in the genus Thermus and related species. Radax C, Sigurdsson O, Hreggvidsson GO, Aichinger N, Gruber C, Kristjansson JK, Stan-Lotter H. Syst. Appl. Microbiol. 21, 12-22, (1998). PMID: 9741106

GO terms

biological process

  • None

molecular function

cellular component

  • None

Cross References

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