Subunit structure: Heterodimer of a type I and a type II keratin. KRT16 associates with KRT6 isomers. Interacts with TCHP. Interacts with TRADD
By similarity. Ref.11
Tissue specificity: Expressed in the hair follicle, nail bed and in mucosal stratified squamous epithelia and, suprabasally, in oral epithelium and palmoplantar epidermis. Also found in luminal cells of sweat and mammary gland ducts.
Involvement in disease: Pachyonychia congenita 1 (PC1) [MIM:167200]: An autosomal dominant ectodermal dysplasia characterized by hypertrophic nail dystrophy resulting in onchyogryposis (thickening and increase in curvature of the nail), palmoplantar keratoderma, follicular hyperkeratosis, and oral leukokeratosis. Hyperhidrosis of the hands and feet is usually present.Note: The disease is caused by mutations affecting the gene represented in this entry. Ref.8 Ref.14 Ref.15 Ref.16 Ref.18 Ref.19Keratoderma, palmoplantar, non-epidermolytic, focal (FNEPPK) [MIM:613000]: A dermatological disorder characterized by non-epidermolytic palmoplantar keratoderma limited to the pressure points on the balls of the feet, with later mild involvement on the palms. Oral, genital and follicular keratotic lesions are often present.Note: The disease is caused by mutations affecting the gene represented in this entry. Ref.13Unilateral palmoplantar verrucous nevus (UPVN) [MIM:144200]: UPVN is characterized by a localized epidermolytic hyperkeratosis in parts of the right palm and the right sole, following the lines of Blaschko.Note: The disease is caused by mutations affecting the gene represented in this entry. Ref.17KRT16 and KRT17 are coexpressed only in pathological situations such as metaplasias and carcinomas of the uterine cervix and in psoriasis vulgaris.
Miscellaneous: There are two types of cytoskeletal and microfibrillar keratin, I (acidic) and II (neutral to basic) (40-55 and 56-70 kDa, respectively).
Sequence similarities: Belongs to the intermediate filament family.
Mass spectrometry: Molecular mass is 50924.66 Da from positions 2 - 473. Determined by MALDI. Ref.10
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