Lect12-Translation

Lect12-Translation - Translation and Proteins Outline The...

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Unformatted text preview: Translation and Proteins Outline The Players: Ribosomes and tRNA Three stages of Translation Translation in Eukaryotes Posttranslational modification One gene:one enzyme hypothesis Protein Structure Outline The Players: Ribosomes and tRNA Three stages of Translation Translation in Eukaryotes Posttranslational modification One gene:one enzyme hypothesis Protein Structure The Players: Ribosomes and tRNA Called functional RNAs (vs. messenger RNA) Make up 95% of all RNAs in cells Ribosomes Two subunits Several molecules of rRNA from single rRNA Ribosomal proteins Size difference btw eukaryotes and prokaryotes rRNA has catalytic function rRNA Encoded by rDNA Single molecule cleaved 23S, 16S and 5S (Prok) 28S, 18S, 5.8S (Euk) + 5S independent gene Multlple copies per genome: E. coli (7), D. melanogaster (120), X. laevis 500 Ribosome comparison tRNA Nearly identical in prokaryotes and eukaryotes Short: 75 90 nucleotides Cleaved from a larger precursor Unique nucleotides in tRNA...
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This note was uploaded on 09/23/2011 for the course BIOLOGY 283 taught by Professor Pedro during the Spring '11 term at UC Irvine.

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Lect12-Translation - Translation and Proteins Outline The...

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