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  • Title: A gene encoding the proteolipid subunit of Sulfolobus acidocaldarius ATPase complex.
    Author: Denda K, Konishi J, Oshima T, Date T, Yoshida M.
    Journal: J Biol Chem; 1989 May 05; 264(13):7119-21. PubMed ID: 2523390.
    Abstract:
    An analysis of genes for the major two subunits of the membrane-associated ATPase from an acidothermophilic archaebacterium, Sulfolobus acidocaldarius, suggested that it belongs to a different ATPase family from the F1-ATPase (Denda, K., Konishi, J., Oshima, T., Date, T., and Yoshida, M. (1988) J. Biol. Chem. 263, 17251-17254). In the same operon of the above two genes we found a gene encoding a very hydrophobic protein of 101 amino acids (Mr = 10,362). A proteolipid was purified from the membranes of this bacteria in which partial amino acid sequences matched with the sequence deduced from the gene. Significant amino acid sequence homology and a similar hydropathy profile appeared when the sequence was compared with the 8-kDa proteolipid subunit of F0F1-ATPases. It is about 30 amino acids larger than the 8-kDa proteolipid and has a small (11-amino acid) repeat sequence. However, it is distinct from the 16-kDa proteolipid subunit of an eukaryotic vacuolar H+-ATPase (Mandel, M., Moriyama, Y., Hulmes, J.D., Pan, Y.-E., Nelson, H., and Nelson, N. (1988) Proc. Natl. Acad. Sci. U.S.A. 85,5521-5524).
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