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Details on Person UniProt:Q04695 KRT17

Class:IdReferenceGeneProduct:57709
_chainChangeLogchain:1-432 added on Sat February 7 2015
_displayNameUniProt:Q04695 KRT17
_timestamp2026-02-20 21:40:42
chainchain:1-432
checksum35B429243F47EB5C
commentFUNCTION Type I keratin involved in the formation and maintenance of various skin appendages, specifically in determining shape and orientation of hair (By similarity). Required for the correct growth of hair follicles, in particular for the persistence of the anagen (growth) state (By similarity). Modulates the function of TNF in the specific context of hair cycling. Regulates protein synthesis and epithelial cell growth through binding to the adapter protein SFN and by stimulating Akt/mTOR pathway (By similarity). Involved in tissue repair. May be a marker of basal cell differentiation in complex epithelia and therefore indicative of a certain type of epithelial 'stem cells'. Acts as a promoter of epithelial proliferation by acting a regulator of immune response in skin: promotes Th1/Th17-dominated immune environment contributing to the development of basaloid skin tumors (By similarity). May act as an autoantigen in the immunopathogenesis of psoriasis, with certain peptide regions being a major target for autoreactive T-cells and hence causing their proliferation.SUBUNIT Heterodimer of a type I and a type II keratin. KRT17 associates with KRT6 isomers (KRT6A or KRT6B). Interacts with TRADD and SFN (By similarity).INTERACTION Expressed in the outer root sheath and medulla region of hair follicle specifically from eyebrow and beard, digital pulp, nail matrix and nail bed epithelium, mucosal stratified squamous epithelia and in basal cells of oral epithelium, palmoplantar epidermis and sweat and mammary glands. Also expressed in myoepithelium of prostate, basal layer of urinary bladder, cambial cells of sebaceous gland and in exocervix (at protein level).INDUCTION Induced in damaged or stressed epidermis. Induced by the cytokines interferon-gamma (IFN-gamma), tumor necrosis factor alpha (TNF) and transforming growth factor-alpha (TGF-alpha), and by the potent NF-kappa B inhibitor compounds Bay 11-7082 and Bay 11-7085. Down-regulated by the drug Imatinib.PTM Phosphorylation at Ser-44 occurs in a growth- and stress-dependent fashion in skin keratinocytes, it has no effect on filament organization.DISEASE The disease is caused by variants affecting the gene represented in this entry.DISEASE The disease is caused by variants affecting the gene represented in this entry.DISEASE KRT16 and KRT17 are coexpressed only in pathological situations such as metaplasias and carcinomas of the uterine cervix and in psoriasis vulgaris.DISEASE Defects in KRT17 may be the cause of a keratinization disorder with associated thrombocytopenia characterized by generalized harlequin ichthyosis that progress into palmoplantar keratoderma.MISCELLANEOUS There are two types of cytoskeletal and microfibrillar keratin: I (acidic; 40-55 kDa) and II (neutral to basic; 56-70 kDa).SIMILARITY Belongs to the intermediate filament family.SEQUENCE CAUTION Keratin-17 entry
descriptionrecommendedName: Keratin, type I cytoskeletal 17 alternativeName: 39.1 alternativeName: Cytokeratin-17 shortName: CK-17 alternativeName: Keratin-17 shortName: K17
geneNameKRT17
identifierQ04695
isSequenceChangedFALSE
keywordCoiled coil
Cytoplasm
Disease variant
Ectodermal dysplasia
Intermediate filament
Isopeptide bond
Keratin
Palmoplantar keratoderma
Phosphoprotein
Proteomics identification
Reference proteome
Ubl conjugation
modified[InstanceEdit:9836292] Weiser, Joel, 2023-05-25
[InstanceEdit:9852000] Weiser, Joel, 2023-11-03
[InstanceEdit:9917590] Weiser, Joel, 2024-08-09
[InstanceEdit:9926675] Weiser, Joel, 2024-11-03
[InstanceEdit:9983091] Weiser, Joel, 2026-02-20
nameKRT17
referenceDatabase[ReferenceDatabase:2] UniProt
referenceGene[ReferenceDNASequence:8997220] ENSEMBL:ENSG00000128422 KRT17 [Homo sapiens]
secondaryIdentifierK1C17_HUMAN
A5Z1M9
A5Z1N0
A5Z1N1
A5Z1N2
A6NDV6
A6NKQ2
Q6IP98
Q8N1P6
sequenceLength432
species[Species:48887] Homo sapiens
(referenceEntity)[EntityWithAccessionedSequence:201583] KRT17 [cytosol] [Homo sapiens]
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