Reference: Nelson H, et al. (1994) The Saccharomyces cerevisiae VMA7 gene encodes a 14-kDa subunit of the vacuolar H(+)-ATPase catalytic sector. J Biol Chem 269(39):24150-5

Reference Help

Abstract


Yeast vacuoles contain an H(+)-ATPase that acidifies the vacuolar lumen and generates an electrochemical gradient of protons across their membranes. Five polypeptides, denoted as subunits A to E in the order of decreasing molecular masses from 69 to 27 kDa, were identified in the catalytic sector of the enzyme. However, other polypeptides may be necessary for the activity of the enzyme. When a 14-kDa polypeptide was suggested to be a subunit of a specialized V-ATPase in Manduca sexta, and a homologous short sequence was detected downstream of the UGA1 gene in yeast, we cloned this counterpart gene from yeast. The gene VMA7 encodes a protein Vma7p of about 14 kDa. The predicted protein is highly homologous to the above mentioned M. sexta protein. The delta vma7::URA3 null mutant exhibits growth characteristics typical of other VMA disruptant mutants in genes encoding subunits of the catalytic sector. The delta vma7::URA3 null mutants are not able to grow on a medium buffered at pH 7.5, they fail to accumulate quinacrine into their vacuoles and the other subunits of the catalytic sector are not assembled onto the vacuolar membrane in its absence. Epitope-tagged Vma7p was constructed and the proton uptake activity of isolated vacuoles from this yeast strain was markedly inhibited by a monoclonal antibody against the epitope-tag. A cold inactivation experiment demonstrated that Vma7p is a genuine subunit of the catalytic sector of V-ATPase and it is denoted as subunit F.

Reference Type
Journal Article
Authors
Nelson H, Mandiyan S, Nelson N
Primary Lit For
Additional Lit For
Review For

Gene Ontology Annotations


Increase the total number of rows showing on this page using the pull-down located below the table, or use the page scroll at the table's top right to browse through the table's pages; use the arrows to the right of a column header to sort by that column; filter the table using the "Filter" box at the top of the table.

Gene/Complex Qualifier Gene Ontology Term Aspect Annotation Extension Evidence Method Source Assigned On Reference

Phenotype Annotations


Increase the total number of rows showing on this page using the pull-down located below the table, or use the page scroll at the table's top right to browse through the table's pages; use the arrows to the right of a column header to sort by that column; filter the table using the "Filter" box at the top of the table; click on the small "i" buttons located within a cell for an annotation to view further details.

Gene Phenotype Experiment Type Mutant Information Strain Background Chemical Details Reference

Disease Annotations


Increase the total number of rows showing on this page using the pull-down located below the table, or use the page scroll at the table's top right to browse through the table's pages; use the arrows to the right of a column header to sort by that column; filter the table using the "Filter" box at the top of the table.

Gene Disease Ontology Term Qualifier Evidence Method Source Assigned On Reference

Regulation Annotations


Increase the total number of rows displayed on this page using the pull-down located below the table, or use the page scroll at the table's top right to browse through the table's pages; use the arrows to the right of a column header to sort by that column; to filter the table by a specific experiment type, type a keyword into the Filter box (for example, “microarray”); download this table as a .txt file using the Download button or click Analyze to further view and analyze the list of target genes using GO Term Finder, GO Slim Mapper, SPELL, or YeastMine.

Regulator Target Direction Regulation Of Happens During Method Evidence

Post-translational Modifications


Increase the total number of rows showing on this page by using the pull-down located below the table, or use the page scroll at the table's top right to browse through its pages; use the arrows to the right of a column header to sort by that column; filter the table using the "Filter" box at the top of the table.

Site Modification Modifier Reference

Interaction Annotations


Genetic Interactions

Increase the total number of rows showing on this page by using the pull-down located below the table, or use the page scroll at the table's top right to browse through the table's pages; use the arrows to the right of a column header to sort by that column; filter the table using the "Filter" box at the top of the table; click on the small "i" buttons located within a cell for an annotation to view further details about experiment type and any other genes involved in the interaction.

Interactor Interactor Allele Assay Annotation Action Phenotype SGA score P-value Source Reference

Physical Interactions

Increase the total number of rows showing on this page by using the pull-down located below the table, or use the page scroll at the table's top right to browse through the table's pages; use the arrows to the right of a column header to sort by that column; filter the table using the "Filter" box at the top of the table; click on the small "i" buttons located within a cell for an annotation to view further details about experiment type and any other genes involved in the interaction.

Interactor Interactor Assay Annotation Action Modification Source Reference

Functional Complementation Annotations


Increase the total number of rows showing on this page by using the pull-down located below the table, or use the page scroll at the table's top right to browse through its pages; use the arrows to the right of a column header to sort by that column; filter the table using the "Filter" box at the top of the table.

Gene Species Gene ID Strain background Direction Details Source Reference