Question

Q7. During translation , the role of enzyme peptidyl transferase is *​

Answer 1

Answer:

The peptidyl transferase is an aminoacyltransferase (EC 2.3. 2.12) as well as the primary enzymatic function of the ribosome, which forms peptide bonds between adjacent amino acids using tRNAs during the translation process of protein biosynthesis.

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Answer 2

Peptide bond formation and peptide release are catalysed by the ribosomal peptidyl transferase centre (PTC), which is found in the large ribosomal subunit.

• The two tRNA atoms that are used as substrates for the peptidyl transferase reaction are the first one carrying the growing peptide chain and the second one carrying the amino alkanoic acid that will be added to the chain.
• The peptidyl transferase is also an amino acyltransferase, which creates peptide linkages between contiguous amino acids using tRNAs throughout the translation cycle of protein formation.
• It's one of the few enzymes that aren't proteinaceous in nature, instead of acting as a ribozyme, implying that RNA serves as a catalyst.
• Peptidyl transferase accelerates the reaction by reducing the activation energy.
• The peptidyl transferase gives proximity, which means it puts things closer together but is not an alternative mechanism. Instead, it ensures appropriate substrate orientation, increasing the likelihood of the prevailing mechanism operating.