Download MendeleyCrystal structure of the regulatory subunit H of the V-type ATPase of Saccharomyces cerevisiae.
Sagermann, M., Stevens, T.H., Matthews, B.W.(2001) Proc Natl Acad Sci U S A 98: 7134-7139
- PubMed: 11416198 Search on PubMedSearch on PubMed Central
- DOI: https://doi.org/10.1073/pnas.131192798
- Primary Citation Related Structures:
1HO8 - PubMed Abstract:
In contrast to the F-type ATPases, which use a proton gradient to generate ATP, the V-type enzymes use ATP to actively transport protons into organelles and extracellular compartments. We describe here the structure of the H-subunit (also called Vma13p) of the yeast enzyme. This is the first structure of any component of a V-type ATPase. The H-subunit is not required for assembly but plays an essential regulatory role. Despite the lack of any apparent sequence homology the structure contains five motifs similar to the so-called HEAT or armadillo repeats seen in the importins. A groove, which is occupied in the importins by the peptide that targets proteins for import into the nucleus, is occupied here by the 10 amino-terminal residues of subunit H itself. The structural similarity suggests how subunit H may interact with the ATPase itself or with other proteins. A cleft between the amino- and carboxyl-terminal domains also suggests another possible site of interaction with other factors.
- Institute of Molecular Biology, University of Oregon, Eugene, OR 97403-1229, USA.
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