What is the primary function of rRNA?
rRNA (ribosomal RNA) run along the mRNA to align the amino acids up in the correct orientation for them to synthesize proteins.
rRNA stands for Ribosomal RNA, which are sets of proteins in the form of a ribosome that run along the mRNA to align the amino acids up in the correct orientation for them to synthesize proteins.
The primary function of rRNA is in protein synthesis - in binding to mRNA and tRNA, to ensure that the codon sequence of the mRNA is accurately translated into a protein.
It is the RNA component of the ribosome and is essential for protein synthesis in all living organisms. The structure of the ribosome is determined by the 3-D shape of its RNA core.
The rRNA has a distinctive 3-D shape involving internal loops and helices that create specific sites within the ribosome -
1) P-site: for binding a growing polypeptide which allows the start codon to be positioned within the ribosome.
2) A-site: for anchoring an incoming tRNA charged with an amino acid
3) E-site: after peptide bond formation the tRNA bind briefly to the E-site before leaving the ribosome.
Translation of the mRNA sequence requires the involvement of rRNA at every step - initiation, elongation and termination. rRNA in the larger subunit of he ribosome catalyses the reaction that forms a peptide bond between the amino acid in the A-site and the growing polypeptide chain in the P-site. The polypeptide synthesis is terminated when the ribosome reaches a stop codon and rRNA catalyses the addition of a water molecule to the polypeptide in the P-site.
Impact of this question
Creative Commons License