National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01 GM29169
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
HL68744
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM64779
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
CA098131
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
ES11993
米国
引用
ジャーナル: Proteomics / 年: 2021 タイトル: A Time-Resolved Cryo-EM Study of Saccharomyces cerevisiae 80S Ribosome Protein Composition in Response to a Change in Carbon Source. 著者: Ming Sun / Bingxin Shen / Wen Li / Parimal Samir / Christopher M Browne / Andrew J Link / Joachim Frank / 要旨: The role of the ribosome in the regulation of gene expression has come into increased focus. It is proposed that ribosomes are catalytic engines capable of changing their protein composition in ...The role of the ribosome in the regulation of gene expression has come into increased focus. It is proposed that ribosomes are catalytic engines capable of changing their protein composition in response to environmental stimuli. Time-resolved cryo-electron microscopy (cryo-EM) techniques are employed to identify quantitative changes in the protein composition and structure of the Saccharomyces cerevisiae 80S ribosomes after shifting the carbon source from glucose to glycerol. Using cryo-EM combined with the computational classification approach, it is found that a fraction of the yeast cells' 80S ribosomes lack ribosomal proteins at the entrance and exit sites for tRNAs, including uL16(RPL10), eS1(RPS1), uS11(RPS14A/B), and eS26(RPS26A/B). This fraction increased after a change from glucose to glycerol medium. The quantitative structural analysis supports the hypothesis that ribosomes are dynamic complexes that alter their composition in response to changes in growth or environmental conditions.