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The dynamin-related protein Vps1 and the peroxisomal membrane protein Pex27 function together during peroxisome fission.
Ekal, Lakhan; Alqahtani, Abdulaziz M S; Hettema, Ewald H.
Afiliação
  • Ekal L; School of Biosciences, University of Sheffield, Sheffield S10 2TN, UK.
  • Alqahtani AMS; School of Biosciences, University of Sheffield, Sheffield S10 2TN, UK.
  • Hettema EH; Department of Biology, Faculty of Science, University of Bisha, P.O. Box 551, Bisha 61922, Saudi Arabia.
J Cell Sci ; 136(6)2023 03 15.
Article em En | MEDLINE | ID: mdl-36825558
Dynamin-related proteins (Drps) mediate a variety of membrane remodelling processes. The Saccharomyces cerevisiae Drp, Vps1, is required for endocytosis, endosomal sorting, vacuole fusion, and peroxisome fission and breakdown. How Drps, and in particular Vps1, can function at so many different subcellular locations is of interest to our understanding of cellular organisation. We found that the peroxisomal membrane protein Pex27 is specifically required for Vps1-dependent peroxisome fission in proliferating cells but is not required for Dnm1-dependent peroxisome fission. Pex27 accumulates in constricted regions of peroxisomes and affects peroxisome geometry upon overexpression. Moreover, Pex27 physically interacts with Vps1 in vivo and is required for the accumulation of a GTPase-defective Vps1 mutant (K42A) on peroxisomes. During nitrogen starvation, a condition that halts cell division and induces peroxisome breakdown, Vps1 associates with the pexophagophore. Pex27 is neither required for Vps1 recruitment to the pexophagophore nor for pexophagy. Our study identifies Pex27 as a Vps1-specific partner for the maintenance of peroxisome number in proliferating yeast cells.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Peroxissomos / Proteínas de Saccharomyces cerevisiae Idioma: En Revista: J Cell Sci Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Peroxissomos / Proteínas de Saccharomyces cerevisiae Idioma: En Revista: J Cell Sci Ano de publicação: 2023 Tipo de documento: Article