Elongation factor P

EF-P (elongation factor P) is a prokaryotic protein translation factor required for efficient peptide bond synthesis on 70S ribosomes from fMet-tRNAfMet. It probably functions indirectly by altering the affinity of the ribosome for aminoacyl-tRNA, thus increasing their reactivity as acceptors for peptidyl transferase. EF-P (elongation factor P) is a prokaryotic protein translation factor required for efficient peptide bond synthesis on 70S ribosomes from fMet-tRNAfMet. It probably functions indirectly by altering the affinity of the ribosome for aminoacyl-tRNA, thus increasing their reactivity as acceptors for peptidyl transferase. EF-P consists of three domains: eIF5A is the eukaryotic homolog of EF-P. It has been suggested that after binding of the initiator tRNA to the P/I site, it is correctly positioned to the P site by binding of EF-P to the E site. Additionally, EF-P has been shown to assist in efficient translation of three or more consecutive proline residues.