3-23-09_Notes

3-23-09_Notes - - - - - - All translation occurs in the...

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- All translation occurs in the cytoplasm - The other 160 chloroplasts are incorporated in the stroma of the cell - Golgi is the place where carbohydrate units are modified or can be discarded - Translation occurs in the cytoplasm - Hydrophobic sequence can be recognized in the particle - When it engages translocon, GTP binding starts - When these two come together, GTP is released into the subunits - Purpose of hydrolysis is to bring about proper type of function - Tendency for hole in structure to open up - Once SRP is released, it can arrest translation of another peptide in ribosome, and the process is repeated again - Will have a polysome that is membrane-bound - Proteins can be secreted, in lumen - Integral membrane proteins are made this way too - The SRP itself consists of an RNA - SRP binds through the M domain of SRP54 to signal recognition sequence of membrane and secretory proteins emerging from exit site of the large ribosomal subunit - The Alu domain promotes transient arrest of the polypeptide chain elongation through a yet unknown mechanism. The affinity of SRP54 for GTP increases upon
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3-23-09_Notes - - - - - - All translation occurs in the...

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