Component of adherens-type cell-cell and cell-matrix junctions (PubMed:8175905). Positively regulates maturation and alignment of myofibrils, also promotes organization of sarcomeres (By similarity). Has no phosphoglucomutase activity in vitro (PubMed:8175905). {ECO:0000250|UniProtKB:Q8BZF8, ECO:0000269|PubMed:8175905}. This is the function of Ensembl gene identifier ENSG00000154330 (PGM5, phosphoglucomutase 5).