Members of this family are MppP, one of three enzymes involved in synthesizing enduracididine, a non-proteinogenic amino acid used in non-ribosomal peptide synthases to make natural products such as enduracidin from Streptomyces fungicidicus ATCC 21013. MppP is a PLP-dependent enzyme, predicted by homology to be an aminotransferase.
Jiyao W et al.(2023). "The conserved domain database in 2023.",