Twenty human keratins are resolved with two-dimensional gel electrophoresis into acidic (pI <5.7) and basic (pI >6.0) subfamilies. The acidic keratins have molecular weights of 56.5, 55, 51, 50, 50', 48, 46, 45, and 40kDa. The basic keratins have molecular weights of 65-67, 64, 59, 58, 56 and 52kDa. Members of acidic and basic subfamilies are found together in pairs. The composition of keratin pairs varies with cell type, differentiation status and environment. Many studies have shown the usefulness of keratins as markers in cancer research and tumor diagnosis.
Synonyms
40-kDa keratin intermediate filament; 47 kDa cytokeratin; 56 kDa cytokeratin; 57kd keratin; 57kDa keratin; 58 kDa cytokeratin; 60-kDa keratin; 65 kDa cytokeratin; 67 kDa cytokeratin; Cell proliferation-inducing gene 46 protein; CK 2e; CK-1; CK-10; CK-13; CK-14; CK-15; CK-16; CK-18; CK-19; CK-2e; CK-3; CK-4; CK-5; CK-6A; CK-6D; CK-7; CK-8; cytokeratin 1; cytokeratin 10; cytokeratin 13; cytokeratin 14; cytokeratin 15; cytokeratin 16; cytokeratin 18; cytokeratin 19; cytokeratin 3; cytokeratin 4; cytokeratin 5; cytokeratin 6A; cytokeratin 6C; cytokeratin 6D; Cytokeratin 7; cytokeratin 8; Cytokeratin endo A; Cytokeratin endo B; Cytokeratin VIB; cytokeratin VII; Cytokeratin-1; Cytokeratin-10; Cytokeratin-13; Cytokeratin-14; Cytokeratin-15; Cytokeratin-16; Cytokeratin-18; Cytokeratin-19; Cytokeratin-2e; Cytokeratin-3; Cytokeratin-4; Cytokeratin-5; Cytokeratin-6A; Cytokeratin-6B; cytokeratin-6C; Cytokeratin-6D; cytokeratin-6E; Cytokeratin-7; Cytokeratin-8; Cytokeratin-A; Cytoskeletal 57 kDa keratin; Endo B; epidermal keratin 10; epidermal keratin VII; epidermolysis bullosa simplex 2 Dowling-Meara/Kobner/Weber-Cockayne types; epidermolysis bullosa simplex, Dowling-Meara, Koebner; epidermolytic hyperkeratosis 1; epidermolytic hyperkeratosis; keratosis palmaris et plantaris; Epithelial keratin-2e; focal non-epidermolytic palmoplantar keratoderma; GK-19; Hair alpha protein; HMWCK; intermediate filament protein; K1; K10; K13; K14; K15; K16; K18; K19; K2e; K3; K3 keratin; K4; K5; K6A; K6a keratin; K7; K8; kamp-keratin derived antimicrobial peptide; KDAMP; KERA; keratin 1, type II; keratin 10 (epidermolytic hyperkeratosis); keratin 10 (epidermolytic hyperkeratosis; keratosis palmaris et plantaris); keratin 10, type I; keratin 13, type I; keratin 14 (epidermolysis bullosa simplex, Dowling-Meara, Koebner); keratin 14, type I; keratin 15, type I; keratin 16, type I; keratin 18, type I; keratin 19, type I; keratin 2 epidermis; keratin 2, type II; keratin 3; keratin 3, type II; keratin 4, type II; keratin 5 (epidermolysis bullosa simplex Dowling-Meara/Kobner/Weber-Cockayne types); keratin 5 (epidermolysis bullosa simplex, Dowling-Meara/Kobner/Weber-Cockayne types); keratin 5, type II; keratin 6A, , type II; keratin 6A, type II; keratin 7, type II; keratin 8, type II; keratin 86; keratin complex 1, acidic, gene 10; keratin complex 1, acidic, gene 13; keratin complex 1, acidic, gene 14; keratin complex 1, acidic, gene 15; keratin complex 1, acidic, gene 16; keratin complex 1, acidic, gene 18; keratin complex 1, acidic, gene 19; keratin complex 2, basic, gene 1; keratin complex 2, basic, gene 17; keratin complex 2, basic, gene 4; keratin complex 2, basic, gene 5; keratin complex 2, basic, gene 6a; keratin complex 2, basic, gene 6c; keratin complex 2, basic, gene 7; keratin complex 2, basic, gene 8; keratin complex 2, gene 17; keratin complex 2, gene 6a; Keratin D; keratin intermediate filament 16a; keratin intermediate filament 16b; keratin K3; keratin K6; keratin K6h; keratin, 55K type II cytoskeletal; keratin, epidermal type II, K6A; keratin, simple epithelial type I, K7; Keratin, type I cytoskeletal 10; Keratin, type I cytoskeletal 13; Keratin, type I cytoskeletal 14; Keratin, type I cytoskeletal 15; Keratin, type I cytoskeletal 16; Keratin, type I cytoskeletal 18; Keratin, type I cytoskeletal 19; Keratin, type I cytoskeletal 59 kDa; keratin, type I, 40-kd; Keratin, type II cytoskeletal 1; Keratin, type II cytoskeletal 2 epidermal; Keratin, type II cytoskeletal 3; Keratin, type II cytoskeletal 4; Keratin, type II cytoskeletal 5; keratin, type II cytoskeletal 60 kDa, component III; Keratin, type II cytoskeletal 6A; Keratin, type II cytoskeletal 7; Keratin, type II cytoskeletal 8; Keratin-1; Keratin-10; Keratin-13; Keratin-14; Keratin-15; keratin-15, basic; keratin-15, beta; Keratin-16; Keratin-18; Keratin-19; Keratin-2 epidermis; Keratin-2e; Keratin-3; Keratin-4; Keratin-5; Keratin-6-alpha; Keratin-6A; keratin-6C; Keratin-7; Keratin-8; krt1 {ECO:0000250|UniProtKB:P04264}; krt10 {ECO:0000250|UniProtKB:P13645}; krt13 {ECO:0000250|UniProtKB:P13646}; krt15 {ECO:0000250|UniProtKB:P19012}; krt18 {ECO:0000250|UniProtKB:P05783}; krt2; krt2 {ECO:0000250|UniProtKB:P35908}; krt4 {ECO:0000250|UniProtKB:P19013}; krt5; krt7; krt7 {ECO:0000250|UniProtKB:P08729}; mK6-alpha; pankeratin; Sarcolectin; suprabasal cytokeratin 10; tuftelin interacting protein 8; type I alpha-keratin 14; type I cytoskeletal 15; Type I keratin Ka10; Type I keratin Ka13; Type I keratin Ka14; Type I keratin Ka15; Type I keratin Ka19; type II keratin Kb1; type II keratin Kb2; type II keratin Kb4; type II keratin Kb7; type II mesothelial keratin K7; Type-II keratin Kb1; type-II keratin Kb12; Type-II keratin Kb2; Type-II keratin Kb3; Type-II keratin Kb4; Type-II keratin Kb5; Type-II keratin Kb6; Type-II keratin Kb7; Type-II keratin Kb8
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