Pyridoxal 5'-phosphate (PLP)-binding protein, which may be involved in intracellular homeostatic regulation of pyridoxal 5'- phosphate (PLP), the active form of vitamin B6. {ECO:0000255|HAMAP- Rule:MF_03225, ECO:0000269|PubMed:27912044}. This is the function of Ensembl gene identifier ENSG00000147471 (PLPBP, pyridoxal phosphate binding protein).