The first sequences of keratins revealed that keratins could be grouped into two categories based on their sequence homologies. These two groups of keratins were named as type I and type II keratins. These two categories also represent the first two categories of the superfamily of intermediate filament proteins.
Keratins in this table are classified in the first two columns according to the nomenclature established in 2006. Other names previously used are listed in columns 3 and 4.
Type I keratins
Human epithelial keratins
Protein name
Gene name
Other protein name
Other gene name
K9
KRT9
Ka9
K10
KRT10
Ka10
K12
KRT12
Ka12
K13
KRT13
Ka13
K14
KRT14
Ka14
K15
KRT15
Ka15
K16
KRT16
Ka16
K17
KRT17
Ka17
K18
KRT18
Ka18
K19
KRT19
Ka19
K20
KRT20
Ka20
K23
KRT23
Ka23
K24
KRT24
Ka24
K25
KRT25
Ka38, K25irs1, K10C, hIRSa1
KRT25A
K26
KRT26
Ka39, K25irs2, K10D
K27
KRT27
Ka40, K25irs3, K10B, hIRSa3.1
K28
KRT28
Ka41, K25irs4, hIRSa2
Human hair keratins
Nonhuman hair/epithelial keratins
Protein name
Gene name
Other protein name
Other gene name
K41 chimp, gorilla, dog
KRT41 chimp, gorilla, dog; KRT41P man, horse
φhHaA, Ka34P man
K42 mouse, rat
KRT42 mouse, rat; KRT42P man
Ka22 mouse, rat, K17n mouse, rat
Human keratin pseudogenes
Protein name
Gene name
Other protein name
Other gene name
KRT221P
φhHaB
KRT222P
φKRTI, Ka21P
KRT223P
φKRTJ, Ka37P
Type II keratins
Human epithelial keratin
Protein name
Gene name
Other protein name
Other gene name
K1
KRT1
Kb1
K2
KRT2
Kb2, K2e
KRT2A
K3
KRT3
Kb3
K4
KRT4
Kb4
K5
KRT5
Kb5
K6a
KRT6A
Kb6
K6b
KRT6B
Kb10
K7
KRT7
Kb7
K8
KRT8
Kb8
K71
KRT71
Kb34, K6irs1
K72
KRT72
Kb35, K6irs2
K73
KRT73
Kb36, K6irs3
K74
KRT74
Kb37, K6irs4
K75
KRT75
Kb18, K6hf
K76
KRT76
Kb9, K2p
KRT2B
K77
KRT77
Kb39, K1b
K78
KRT78
Kb40, K5b
K79
KRT79
Kb38, K6I
K80
KRT80
Kb20
Human hair keratins
Protein name
Gene name
Other protein name
Other gene name
K81
KRT81
Kb21, Hb1, K2.9
KRTHB1
K82
KRT82
Kb22, Hb2
KRTHB2
K83
KRT83
Kb23, Hb3, K2.10
KRTHB3
K84
KRT84
Kb24, Hb4
KRTHB4
K85
KRT85
Kb25, Hb5, K2.12
KRTHB5
K86
KRT86
Kb26, Hb6, K2.11
KRTHB6
Human keratin pseudogenes
See also
References
Hanukoglu, I.; Fuchs, E. (Nov 1982). "The cDNA sequence of a human epidermal keratin: divergence of sequence but conservation of structure among intermediate filament proteins" . Cell . 31 (1): 243–52. doi :10.1016/0092-8674(82)90424-X . PMID 6186381 . S2CID 35796315 . Archived from the original on 2021-01-26. Retrieved 2019-12-11.
^ Hanukoglu, I.; Fuchs, E. (Jul 1983). "The cDNA sequence of a Type II cytoskeletal keratin reveals constant and variable structural domains among keratins" . Cell . 33 (3): 915–24. doi :10.1016/0092-8674(83)90034-X . PMID 6191871 . S2CID 21490380 . Archived from the original on 2021-01-26. Retrieved 2019-09-12.
^ Schweizer J, Bowden PE, Coulombe PA, et al. (July 2006). "New consensus nomenclature for mammalian keratins" . J. Cell Biol . 174 (2): 169–74. doi :10.1083/jcb.200603161 . PMC 2064177 . PMID 16831889 .
Balmer, P; Bauer, A; Pujar, S; McGarvey, KM; Welle, M; Galichet, A; Müller, EJ; Pruitt, KD; Leeb, T; Jagannathan, V (2017). "A curated catalog of canine and equine keratin genes" . PLOS ONE . 12 (8): e0180359. Bibcode :2017PLoSO..1280359B . doi :10.1371/journal.pone.0180359 . PMC 5573215 . PMID 28846680 .
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