Reference: Trotter PJ and Voelker DR (1995) Identification of a non-mitochondrial phosphatidylserine decarboxylase activity (PSD2) in the yeast Saccharomyces cerevisiae. J Biol Chem 270(11):6062-70

Reference Help

Abstract


Phosphatidylserine decarboxylase (PSD1) plays a central role in the biosynthesis of aminophospholipids in both prokaryotes and eukaryotes by catalyzing the synthesis of phosphatidylethanolamine. Recent reports (Trotter, P. J., Pedretti, J., and Voelker, D. R. (1993) J. Biol. Chem. 268, 21416-21424; Clancey, C. J., Chang, S.-C., and Dowhan, W. (1993) J. Biol. Chem. 268, 24580-24590) described the cloning of a yeast structural gene for this enzyme (PSD1) and the creation of the null allele. Based on the phenotype of strains containing a null allele for PSD1 (psd1-delta 1::TRP1) it was hypothesized that yeast have a second phosphatidylserine decarboxylase. The present studies demonstrate the presence of a second enzyme activity (denoted PSD2), which, depending on the method of evaluation, accounts for 4-12% of the total cellular phosphatidylserine decarboxylase activity found in wild type. Recessive mutations resulting in loss of this enzyme activity (denoted psd2) in cells containing the psd1-delta 1::TRP1 null allele also result in ethanolamine auxotrophy. When incubated with [3H]serine these double mutants accumulate label in phosphatidylserine, while very little (< 5%) is converted to phosphatidylethanolamine. In addition, these mutants have a approximately 70% decrease in the amount of total phosphatidylethanolamine even when grown in the presence of exogenous ethanolamine. Strains containing psd1 or psd2 mutations were utilized for the subcellular localization of the PSD2 enzyme activity. Unlike the PSD1 activity, the PSD2 enzyme activity does not localize to the mitochondria, but to a low density subcellular compartment with fractionation properties similar to both vacuoles and Golgi.

Reference Type
Comparative Study | Journal Article | Research Support, U.S. Gov't, P.H.S.
Authors
Trotter PJ, Voelker DR
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