title: GPR1 regulates filamentous growth through FLO11 in yeast Saccharomyces cerevisiae.
abstract: Cell growth and differentiation are regulated by nutrient availability in the yeast Saccharomyces cerevisiae. Under conditions of nitrogen limitation, diploid cells of S. cerevisiae differentiate to a filamentous growth known as a pseudohyphal growth, while haploid cells produce invasive filaments which penetrate the agar in nutrient-rich medium. We have found that GPR1, which encodes a putative G-protein-coupled receptor, is required for both pseudohyphal and invasive growth. Pseudohyphal growth was defective in Deltagpr1/Deltagpr1 mutant strain and this defect was reversed by addition of cAMP. Also, haploid Deltagpr1 mutant strain was defective in invasive growth. Northern blot analysis revealed that the transcriptional level of FLO11, which encodes a recently identified cell surface flocculin required for pseudohyphal growth, was reduced in Deltagpr1 mutant strain. These results indicate that GPR1 regulates both pseudohyphal and invasive growth by a cAMP-dependent mechanism.
authors.affiliation: Graduate School of Biostudies, Kyoto University, Kyoto, 606-8502, Japan. noritama@kais.kyoto-u.ac.jp
authors.forename: H
authors.initials: H
authors.lastname: Tamaki
authors.forename: T
authors.initials: T
authors.lastname: Miwa
authors.forename: M
authors.initials: M
authors.lastname: Shinozaki
authors.forename: M
authors.initials: M
authors.lastname: Saito
authors.forename: C W
authors.initials: CW
authors.lastname: Yun
authors.forename: K
authors.initials: K
authors.lastname: Yamamoto
authors.forename: H
authors.initials: H
authors.lastname: Kumagai
mesh_terms: D015152:Blotting, Northern; D003470:Culture Media; D005656:Fungal Proteins / Q000235:genetics / Q000502:physiology; D044385:GTP-Binding Protein alpha Subunits; D005838:Genotype; D020962:Heterotrimeric GTP-Binding Proteins / Q000235:genetics / Q000502:physiology; D006720:Homozygote; D008562:Membrane Glycoproteins; D008565:Membrane Proteins / Q000235:genetics / Q000502:physiology*; D016254:Mutagenesis, Insertional; D011956:Receptors, Cell Surface / Q000235:genetics / Q000502:physiology*; D043562:Receptors, G-Protein-Coupled; D012441:Saccharomyces cerevisiae / Q000235:genetics / Q000254:growth & development / Q000502:physiology*; D029701:Saccharomyces cerevisiae Proteins
chemical_list: D003470:Culture Media; C110690:FLO11 protein, S cerevisiae; D005656:Fungal Proteins; C109334:GPR1 protein, S cerevisiae; D044385:GTP-Binding Protein alpha Subunits; D008562:Membrane Glycoproteins; D008565:Membrane Proteins; D011956:Receptors, Cell Surface; D043562:Receptors, G-Protein-Coupled; D029701:Saccharomyces cerevisiae Proteins; C083907:Gpa2 protein, S cerevisiae; D020962:Heterotrimeric GTP-Binding Proteins