The function of ENSG00000171431 (KRT20, keratin 20) is as follows. Plays a significant role in maintaining keratin filament organization in intestinal epithelia. When phosphorylated, plays a role in the secretion of mucin in the small intestine (By similarity). {ECO:0000250, ECO:0000269|PubMed:12857878, ECO:0000269|PubMed:16608857}.