Precursor peptide that leads to mycofactocin (MFT) after extensive post-translational modifications by enzymes encoded by adjacent genes. Mycofactocin acts as a redox cofactor of nicotinamide-dependent oxidoreductases encoded in the same locus (PubMed:27158836). Is required for the in vivo ethanol assimilation in M.smegmatis (PubMed:31113891). The post-translational modifications that lead to mycofactocin involve oxidative decarboxylation of the C-terminal tyrosine residue catalyzed by MftC, introduction of a tyramine-valine cross-link, removal of the modified C-terminal dipeptide by MftE. The released dipeptide then undergoes oxidative deamination by MftD, glycosylation by MftF and methylation by an unknown enzyme. Cells lacking this gene lose the ability to utilize ethanol as the sole growth substrate. Mycofactocin is classified as a ribosomally synthesized and post-translationally modified peptide (RiPP). Belongs to the mycofactocin precursor peptide family. Extended N-terminus.