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  • Title: Molecular cloning of genes encoding major two subunits of a eubacterial V-type ATPase from Thermus thermophilus.
    Author: Tsutsumi S, Denda K, Yokoyama K, Oshima T, Date T, Yoshida M.
    Journal: Biochim Biophys Acta; 1991 Dec 03; 1098(1):13-20. PubMed ID: 1836357.
    Abstract:
    The atpAB genes which encode the alpha and beta subunits of membrane ATPase from a thermophilic eubacterium, Thermus thermophilus HB8, were cloned. The deduced amino-acid sequences of the alpha subunit (583 amino acids) and the beta subunit (478 amino acids) are only moderately similar to the alpha beta subunits of the F0F1-ATPases, while they are highly similar to the major two subunits of the V-type ATPases, a family of ATPases which have been so far found in eukaryotic endomembrane vacuolar vesicles and archaebacterial plasma membranes. Thus, T. thermophilus ATPase belongs to the V-type ATPase family, even though this bacterium is a eubacterium. The hypothesis that the differentiation of an ancestral ATPase into V-type and F0F1-ATPase occurred after the evolution of a primordial cell into archaebacteria and eubacteria should be modified accordingly.
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