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- ****************************************
- * ATP synthase gamma subunit signature *
- ****************************************
-
- ATP synthase (proton-translocating ATPase) (EC 3.6.1.34) [1,2] is a component
- of the cytoplasmic membrane of eubacteria, the inner membrane of mitochondria,
- and the thylakoid membrane of chloroplasts. The ATPase complex is composed of
- an oligomeric transmembrane sector, called CF(0), and a catalytic core, called
- coupling factor CF(1). The former acts as a proton channel; the latter is
- composed of five subunits, alpha, beta, gamma, delta and epsilon. Subunit
- gamma is believed to be important in regulating ATPase activity and the flow
- of protons through the CF(0) complex. The best conserved region of the gamma
- subunit [3] is its C-terminus which seems to be essential for assembly and
- catalysis. As a signature pattern to detect ATPase gamma subunits, we used a
- 14 residue conserved segment where the last amino acid is found one to three
- residues from the C-terminal extremity.
-
- -Consensus pattern: [IV]-T-x-E-x(2)-E-x(3)-G-A-x-[SAK]
- -Sequences known to belong to this class detected by the pattern: ALL, except
- for pea chloroplast gamma.
- -Other sequence(s) detected in SWISS-PROT: Bacteroides nodosus clpB.
- -Last update: June 1994 / Pattern and text revised.
-
- [ 1] Futai M., Noumi T., Maeda M.
- Annu. Rev. Biochem. 58:111-136(1989).
- [ 2] Senior A.E.
- Physiol. Rev. 68:177-231(1988).
- [ 3] Miki J., Maeda M., Mukohata Y., Futai M.
- FEBS Lett. 232:221-226(1988).
-