The translation termination factor eRF1 (Sup45p) of Saccharomyces cerevisiae is required for pseudohyphal growth and invasion. 2015

Alexandra Petrova, and Denis Kiktev, and Olga Askinazi, and Svetlana Chabelskaya, and Svetlana Moskalenko, and Olga Zemlyanko, and Galina Zhouravleva
Department of Genetics and Biotechnology, St Petersburg State University and St Petersburg Branch Vavilov Institute of General Genetics, Russian Academy of Science, Universitetskaya emb. 7/9, 199034, St Petersburg, Russia.

Mutations in the essential genes SUP45 and SUP35, encoding yeast translation termination factors eRF1 and eRF3, respectively, lead to a wide range of phenotypes and affect various cell processes. In this work, we show that nonsense and missense mutations in the SUP45, but not the SUP35, gene abolish diploid pseudohyphal and haploid invasive growth. Missense mutations that change phosphorylation sites of Sup45 protein do not affect the ability of yeast strains to form pseudohyphae. Deletion of the C-terminal part of eRF1 did not lead to impairment of filamentation. We show a correlation between the filamentation defect and the budding pattern in sup45 strains. Inhibition of translation with specific antibiotics causes a significant reduction in pseudohyphal growth in the wild-type strain, suggesting a strong correlation between translation and the ability for filamentous growth. Partial restoration of pseudohyphal growth by addition of exogenous cAMP assumes that sup45 mutants are defective in the cAMP-dependent pathway that control filament formation.

UI MeSH Term Description Entries
D010454 Peptide Termination Factors Proteins that are involved in the peptide chain termination reaction (PEPTIDE CHAIN TERMINATION, TRANSLATIONAL) on RIBOSOMES. They include codon-specific class-I release factors, which recognize stop signals (TERMINATOR CODON) in the MESSENGER RNA; and codon-nonspecific class-II release factors. Termination Release Factor,Factor, Termination Release,Factors, Peptide Termination,Release Factor, Termination,Termination Factors, Peptide
D004252 DNA Mutational Analysis Biochemical identification of mutational changes in a nucleotide sequence. Mutational Analysis, DNA,Analysis, DNA Mutational,Analyses, DNA Mutational,DNA Mutational Analyses,Mutational Analyses, DNA
D012441 Saccharomyces cerevisiae A species of the genus SACCHAROMYCES, family Saccharomycetaceae, order Saccharomycetales, known as "baker's" or "brewer's" yeast. The dried form is used as a dietary supplement. Baker's Yeast,Brewer's Yeast,Candida robusta,S. cerevisiae,Saccharomyces capensis,Saccharomyces italicus,Saccharomyces oviformis,Saccharomyces uvarum var. melibiosus,Yeast, Baker's,Yeast, Brewer's,Baker Yeast,S cerevisiae,Baker's Yeasts,Yeast, Baker
D014176 Protein Biosynthesis The biosynthesis of PEPTIDES and PROTEINS on RIBOSOMES, directed by MESSENGER RNA, via TRANSFER RNA that is charged with standard proteinogenic AMINO ACIDS. Genetic Translation,Peptide Biosynthesis, Ribosomal,Protein Translation,Translation, Genetic,Protein Biosynthesis, Ribosomal,Protein Synthesis, Ribosomal,Ribosomal Peptide Biosynthesis,mRNA Translation,Biosynthesis, Protein,Biosynthesis, Ribosomal Peptide,Biosynthesis, Ribosomal Protein,Genetic Translations,Ribosomal Protein Biosynthesis,Ribosomal Protein Synthesis,Synthesis, Ribosomal Protein,Translation, Protein,Translation, mRNA,mRNA Translations
D017384 Sequence Deletion Deletion of sequences of nucleic acids from the genetic material of an individual. Deletion Mutation,Deletion Mutations,Deletion, Sequence,Deletions, Sequence,Mutation, Deletion,Mutations, Deletion,Sequence Deletions
D050505 Mutant Proteins Proteins produced from GENES that have acquired MUTATIONS. Mutant Protein,Protein, Mutant,Proteins, Mutant
D018389 Codon, Nonsense An amino acid-specifying codon that has been converted to a stop codon (CODON, TERMINATOR) by mutation. Its occurance is abnormal causing premature termination of protein translation and results in production of truncated and non-functional proteins. A nonsense mutation is one that converts an amino acid-specific codon to a stop codon. Codon, Termination, Premature,Codon, Unassigned,Mutation, Nonsense,Nonsense Codon,Nonsense Mutation,Premature Stop Codon,Unassigned Codon,Amber Nonsense Codon,Amber Nonsense Mutation,Nonsense Codon, Amber,Ochre Nonsense Codon,Ochre Nonsense Mutation,Opal Nonsense Codon,Opal Nonsense Mutation,Premature Termination Codon,Amber Nonsense Codons,Amber Nonsense Mutations,Codon, Amber Nonsense,Codon, Ochre Nonsense,Codon, Opal Nonsense,Codon, Premature Stop,Codon, Premature Termination,Codons, Amber Nonsense,Codons, Nonsense,Codons, Ochre Nonsense,Codons, Opal Nonsense,Codons, Premature Stop,Codons, Premature Termination,Codons, Unassigned,Mutation, Amber Nonsense,Mutation, Ochre Nonsense,Mutation, Opal Nonsense,Mutations, Amber Nonsense,Mutations, Nonsense,Mutations, Ochre Nonsense,Mutations, Opal Nonsense,Nonsense Codon, Ochre,Nonsense Codon, Opal,Nonsense Codons,Nonsense Codons, Amber,Nonsense Codons, Ochre,Nonsense Codons, Opal,Nonsense Mutation, Amber,Nonsense Mutation, Ochre,Nonsense Mutation, Opal,Nonsense Mutations,Nonsense Mutations, Amber,Nonsense Mutations, Ochre,Nonsense Mutations, Opal,Ochre Nonsense Codons,Ochre Nonsense Mutations,Opal Nonsense Codons,Opal Nonsense Mutations,Premature Stop Codons,Premature Termination Codons,Stop Codon, Premature,Stop Codons, Premature,Termination Codon, Premature,Termination Codons, Premature,Unassigned Codons
D020125 Mutation, Missense A mutation in which a codon is mutated to one directing the incorporation of a different amino acid. This substitution may result in an inactive or unstable product. (From A Dictionary of Genetics, King & Stansfield, 5th ed) Missense Mutation,Missense Mutations,Mutations, Missense
D025301 Hyphae Microscopic threadlike filaments in FUNGI that are filled with a layer of protoplasm. Collectively, the hyphae make up the MYCELIUM. Hypha,Hyphas
D029701 Saccharomyces cerevisiae Proteins Proteins obtained from the species SACCHAROMYCES CEREVISIAE. The function of specific proteins from this organism are the subject of intense scientific interest and have been used to derive basic understanding of the functioning similar proteins in higher eukaryotes. Baker's Yeast Proteins,S cerevisiae Proteins

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