Keratin, type II cuticular Hb1 is a protein that in humans is encoded by the KRT81 gene.The protein encoded by this gene is a member of the keratin gene family. As a type II hair keratin, it is a basic protein which heterodimerizes with type I keratins to form hair and nails. The type II hair keratins are clustered in a region of chromosome 12q13 and are grouped into two distinct subfamilies based on structure similarity. One subfamily, consisting of KRTHB1, KRTHB3, and KRTHB6, is highly related. The other less-related subfamily includes KRTHB2, KRTHB4, and KRTHB5. All hair keratins are expressed in the hair follicle; this hair keratin, as well as KRTHB3 and KRTHB6, is found primarily in the hair cortex. Mutations in this gene and KRTHB6 have been observed in patients with a rare dominant hair disease, monilethrix.
KRT81; keratin 81; HB1; hHb1; Basic Hair Keratin K81; Hb-1; KRTHB1; keratin, type II cuticular Hb1; K81; ghHb1; ghHKb1; MLN 137; keratin-81; hair keratin K2.9; type-II keratin Kb21; keratin, hair, basic, 1; hard keratin, type II, 1; type II hair keratin Hb1; metastatic lymph node 137 gene protein; OTTHUMP00000236200.; keratin, hair, basic, 1 , KRTHB1; hard keratin type II 1; Hb 1; MLN137; hHAKB2-1