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peptide IlvX The very short peptide IlvX, 16 amino acids long, is found in Escherchia coli and related species as the apparent first encoded peptide from the ilvXGEDA operon, for which ilvL, further upstream, is the classical attentuator system leader peptide controlling expression. IlvX is preceded by a ribosome binding site, terminates just two nucleotides from ilvG, and has evidence of increased protein expression during isoleucine expression. Its biological role is unknown, and skepticism that IlvX has any molecular function after its biosynthesis may be appropriate. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",