2 Distinct Genes Encode Small Isoproteolipids Affecting Plasma-membrane H+-atpase Activity of Saccharomyces-cerevisiae
(1994) Journal of Biological Chemistry — Vol. 269, n° 33, p. 21262-21268 (1994)
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- Abstract
- A small proteolipid called PMP1 is associated with yeast plasma membrane RC-ATPase (Navarre, C., Ghislain, M., Leterme, S., Ferroud, C., Dufour, J,-P., and Goffeau, A (1992) J. Biol. Chem. 267, 6425-6428). We have identified a second Saccharomyces cerevisiae plasma membrane proteolipid gene by hybridization with a PMP1 probe. The sequence of the corresponding gene, called PMP2, is 92% identical to the PMP1 gene sequence. PMP2 encodes a 43-amino acid polypeptide that can be extracted from the membrane with chloroform/methanol. The two proteolipids differ at residue 21, which is an alanine in PMP1 and a serine in PMP2. The two PMP genes are similarly expressed in the wild-type strain, and no modification of the level of transcription of one PMP gene is detected in a strain deleted of the other. A regulatory function of the proteolipids is indicated by the observation that a strain lacking both PMP genes and no longer containing plasma membrane proteolipids displays a lower V-max of the plasma membrane H+-ATPase activity.
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Navarre, C., Catty, P., Leterme, S., Dietrich, F., & Goffeau, A. (1994). 2 Distinct Genes Encode Small Isoproteolipids Affecting Plasma-membrane H+-atpase Activity of Saccharomyces-cerevisiae. Journal of Biological Chemistry, 269(33), 21262-21268. https://hdl.handle.net/2078.5/145843 (Original work published 1994)