MCB 150 Lecture Notes - Lecture 19: Transfer Rna, Genetic Code, Aminoacyl Trna Synthetase
3 Mar 2017
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This material is going to be on the exam. Determine amino acids are linked to form a protein. Amino acids don"t contact mrna trna act as bridges between amino acids and mrna. Short single stranded rna, but it folds up on itself by intastrand base pairing. Regions of important function on opposite ends. Gray = those three bases are always at the 3" end. Attachment site. the enzymes that attach need to see acc. Dark green = anticodon. sits on mrna and matches base pairs. antiparallel complementary fashion. codons in mrna are given in 5" to 3" and anticodons are given in 3" to 5" The binding of an amino acid to a trna molecule is specific. Endergonic. form of atp. input of energy provided by hydrolysis of. Atp to amp and pyrophosphate (ppi). you break off two phosphates. Different aminoacyl trna synthetase for each amino acid. Ex = histydyl trna synthetase adds his to it"s trna.
