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Structure and Assembly of the Yeast V-ATPase

Structure and Assembly of the Yeast V-ATPase The yeast V-ATPase belongs to a family of V-type ATPases present in all eucaryotic organisms. In Saccharomyces cerevisiae the V-ATPase is localized to the membrane of the vacuole as well as the Golgi complex and endosomes. The V-ATPase brings about the acidification of these organelles by the transport of protons coupled to the hydrolysis of ATP. In yeast, the V-ATPase is composed of 13 subunits consisting of a catalytic V1 domain of peripherally associated proteins and a proton-translocating V0 domain of integral membrane proteins. The regulatory subunit, Vma13p, was the first V-ATPase subunit to have its crystal structure determined. In addition to proteins forming the functional V-ATPase complex, three ER-localized proteins facilitate the assembly of the V0 subunits following their translation and insertion into the membrane of the ER. Homologues of the Vma21p assembly factor have been identified in many higher eukaryotes supporting a ubiquitous assembly pathway for this important enzyme complex. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Bioenergetics and Biomembranes Springer Journals

Structure and Assembly of the Yeast V-ATPase

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References (61)

Publisher
Springer Journals
Copyright
Copyright © 2003 by Plenum Publishing Corporation
Subject
Chemistry; Organic Chemistry; Bioorganic Chemistry; Biochemistry, general; Animal Biochemistry; Animal Anatomy / Morphology / Histology
ISSN
0145-479X
eISSN
1573-6881
DOI
10.1023/A:1025772730586
Publisher site
See Article on Publisher Site

Abstract

The yeast V-ATPase belongs to a family of V-type ATPases present in all eucaryotic organisms. In Saccharomyces cerevisiae the V-ATPase is localized to the membrane of the vacuole as well as the Golgi complex and endosomes. The V-ATPase brings about the acidification of these organelles by the transport of protons coupled to the hydrolysis of ATP. In yeast, the V-ATPase is composed of 13 subunits consisting of a catalytic V1 domain of peripherally associated proteins and a proton-translocating V0 domain of integral membrane proteins. The regulatory subunit, Vma13p, was the first V-ATPase subunit to have its crystal structure determined. In addition to proteins forming the functional V-ATPase complex, three ER-localized proteins facilitate the assembly of the V0 subunits following their translation and insertion into the membrane of the ER. Homologues of the Vma21p assembly factor have been identified in many higher eukaryotes supporting a ubiquitous assembly pathway for this important enzyme complex.

Journal

Journal of Bioenergetics and BiomembranesSpringer Journals

Published: Oct 5, 2004

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