KRT80

gene
On this page

Also known as KB20

Summary

KRT80 (keratin 80, HGNC:27056) is a protein-coding gene on chromosome 12q13.13, encoding Keratin, type II cytoskeletal 80 (Q6KB66).

Keratins are intermediate filament proteins responsible for the structural integrity of epithelial cells and are subdivided into epithelial keratins and hair keratins. This gene’s expression profile shows that it encodes a type II epithelial keratin, although structurally the encoded protein is more like a type II hair keratin. This protein is involved in cell differentiation, localizing near desmosomal plaques in earlier stages of differentiation but then dispersing throughout the cytoplasm in terminally differentiating cells. The type II keratins are clustered in a region of chromosome 12q13. Two transcript variants encoding two different fully functional isoforms have been found for this gene.

Source: NCBI Gene 144501 — RefSeq curated summary.

At a glance

  • GWAS associations: 3
  • Clinical variants (ClinVar): 94 total
  • MANE Select transcript: NM_182507

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:27056
Approved symbolKRT80
Namekeratin 80
Location12q13.13
Locus typegene with protein product
StatusApproved
AliasesKB20
Ensembl geneENSG00000167767
Ensembl biotypeprotein_coding
OMIM611161
Entrez144501

Gene structure

Transcript identifiers

Ensembl transcripts: 3 — 2 protein_coding, 1 retained_intron

ENST00000313234, ENST00000394815, ENST00000466011

RefSeq mRNA: 2 — MANE Select: NM_182507 NM_001081492, NM_182507

CCDS: CCDS41784, CCDS8821

Canonical transcript exons

ENST00000394815 — 9 exons

ExonStartEnd
ENSE000011167205216899652171522
ENSE000014834545218051352180608
ENSE000014834595218090352180963
ENSE000014834655218537952185587
ENSE000034618045217303852173163
ENSE000034995095217360052173764
ENSE000036542675217165852171713
ENSE000036738835217219852172418
ENSE000038461945219160352192014

Expression profiles

Bgee: expression breadth ubiquitous, 170 present calls, max score 98.09.

FANTOM5 (CAGE): breadth broad, TPM avg 29.9373 / max 1318.7522, expressed in 545 samples.

FANTOM5 promoters (10 alternative TSS)

Promoter IDTPM avgSamples expressed
13100324.7217490
1310023.8893405
1310000.3738149
1310010.3618213
2067080.150176
1310040.136881
1309960.100157
1309980.085945
1309990.080835
1309970.037022

Top tissues by expression

245 total, by Bgee expression score (0-100, higher = more expressed):

TissueAnatomy IDExpression scoreQuality
skin of abdomenUBERON:000141698.09gold quality
upper arm skinUBERON:000426397.65gold quality
skin of legUBERON:000151197.49gold quality
zone of skinUBERON:000001497.11gold quality
lower esophagus mucosaUBERON:003583496.91gold quality
upper leg skinUBERON:000426295.52gold quality
amniotic fluidUBERON:000017395.04gold quality
skin of hipUBERON:000155491.08gold quality
gingivaUBERON:000182890.75gold quality
gingival epitheliumUBERON:000194990.63gold quality
esophagus mucosaUBERON:000246990.30gold quality
mammalian vulvaUBERON:000099789.33gold quality
penisUBERON:000098989.28gold quality
esophagus squamous epitheliumUBERON:000692088.19gold quality
buccal mucosa cellCL:000233687.46gold quality
oral cavityUBERON:000016787.23gold quality
islet of LangerhansUBERON:000000686.79gold quality
palpebral conjunctivaUBERON:000181286.13gold quality
parotid glandUBERON:000183185.91gold quality
mouth mucosaUBERON:000372985.67gold quality
minor salivary glandUBERON:000183085.39gold quality
saliva-secreting glandUBERON:000104485.16gold quality
epithelial cell of pancreasCL:000008384.26silver quality
tonsilUBERON:000237282.84gold quality
nippleUBERON:000203082.72gold quality
vaginaUBERON:000099682.16gold quality
pharyngeal mucosaUBERON:000035581.85gold quality
pancreasUBERON:000126479.17gold quality
olfactory segment of nasal mucosaUBERON:000538678.43gold quality
spermCL:000001978.16silver quality

Single-cell (SCXA)

Detected in 4 experiment(s), a significant marker in 2.

ExperimentMarker?Max mean expression
E-MTAB-7249yes11.12
E-ANND-3yes5.38
E-CURD-10no532.88
E-GEOD-86618no180.70

Regulation

Is transcription factor: no

miRNA regulators (miRDB)

91 targeting KRT80, top 30 by miRDB confidence (max_score; target_count = how many genes the miRNA targets in total — lower means more specific):

miRNAMax scoreAvg scoremiRNA target_count
HSA-MIR-340-5P100.0072.504437
HSA-MIR-200B-3P100.0073.312693
HSA-MIR-200C-3P100.0073.352685
HSA-MIR-429100.0073.442698
HSA-MIR-4533100.0069.482758
HSA-MIR-1277-5P100.0073.955056
HSA-MIR-6851-5P100.0065.631294
HSA-MIR-4747-5P100.0067.902681
HSA-MIR-5196-5P100.0067.982761
HSA-MIR-448799.9664.581252
HSA-MIR-130599.9171.433443
HSA-MIR-221-5P99.8665.451052
HSA-MIR-807399.8665.211118
HSA-MIR-629-3P99.8567.991875
HSA-MIR-4728-5P99.8569.394718
HSA-MIR-76599.8468.242442
HSA-MIR-6785-5P99.8268.684428
HSA-MIR-3180-5P99.8269.122422
HSA-MIR-6764-5P99.7567.892304
HSA-MIR-11181-3P99.7566.382205
HSA-MIR-149-3P99.7268.223963
HSA-MIR-6883-5P99.6968.053785
HSA-MIR-320299.6667.702737
HSA-MIR-10394-5P99.6566.831852
HSA-MIR-120599.6566.761826
HSA-MIR-317599.6566.302031
HSA-MIR-613499.6365.681537
HSA-MIR-9851-3P99.6369.681110
HSA-MIR-1249-5P99.6166.552049
HSA-MIR-6797-5P99.6166.552084

Literature-anchored findings (GeneRIF, showing 8)

  • Alternative splice variants, K80 and K80.1 distribute differently in epithelia of hair and skin. (PMID:20843789)
  • KRT80 was an independent prognostic biomarker for CRC and promoted CRC migration and invasion by interacting with PRKDC via activation of the AKT pathway. (PMID:30262880)
  • Study demonstrated that the type II keratin topological associating domain undergoes epigenetic reprogramming in aromatase inhibitors-resistant ER-alpha positive breast cancer cells, leading to KRT80 upregulation. KRT80 expression is driven by de novo enhancer activation by SREBP1. KRT80 levels correlate with stiffer tumors and associates with poor survival in ER-alpha positive breast cancer patients. (PMID:31073170)
  • MiR-4268 suppresses gastric cancer genesis through inhibiting keratin 80. (PMID:35748914)
  • KRT80 expression works as a biomarker and a target for differentiation in gastric cancer. (PMID:37129345)
  • Characters of KRT80 and its roles in neoplasms diseases. (PMID:37211956)
  • LINC01485 contributes to colorectal cancer progression by targeting miR-383-5p/KRT80 axis. (PMID:37782686)
  • The facilitating effects of KRT80 on chemoresistance, lipogenesis, and invasion of esophageal cancer. (PMID:38241178)

Cross-species orthologs

2 orthologs

OrganismSymbolGene ID
mus_musculusKrt80ENSMUSG00000037185
rattus_norvegicusKrt80ENSRNOG00000025994

Paralogs (68): KRT33A (ENSG00000006059), VIM (ENSG00000026025), KRT31 (ENSG00000094796), NEFM (ENSG00000104722), KRT23 (ENSG00000108244), KRT37 (ENSG00000108417), KRT32 (ENSG00000108759), KRT18 (ENSG00000111057), LMNB1 (ENSG00000113368), KRT36 (ENSG00000126337), KRT17 (ENSG00000128422), GFAP (ENSG00000131095), KRT34 (ENSG00000131737), KRT33B (ENSG00000131738), NES (ENSG00000132688), PRPH (ENSG00000135406), KRT85 (ENSG00000135443), KRT7 (ENSG00000135480), KRT71 (ENSG00000139648), INA (ENSG00000148798), LMNTD1 (ENSG00000152936), LMNA (ENSG00000160789), KRT84 (ENSG00000161849), KRT82 (ENSG00000161850), KRT1 (ENSG00000167768), KRT24 (ENSG00000167916), KRT8 (ENSG00000170421), KRT78 (ENSG00000170423), KRT86 (ENSG00000170442), KRT75 (ENSG00000170454), KRT6C (ENSG00000170465), KRT4 (ENSG00000170477), KRT74 (ENSG00000170484), KRT72 (ENSG00000170486), KRT83 (ENSG00000170523), BFSP2 (ENSG00000170819), KRT19 (ENSG00000171345), KRT15 (ENSG00000171346), KRT38 (ENSG00000171360), KRT13 (ENSG00000171401)

Protein

Protein identifiers

Keratin, type II cytoskeletal 80Q6KB66 (reviewed: Q6KB66)

Alternative names: Cytokeratin-80, Keratin-80, Type-II keratin Kb20

All UniProt accessions (1): Q6KB66

UniProt curated annotations — full annotation on UniProt →

Subunit / interactions. Heterotetramer of two type I and two type II keratins.

Tissue specificity. Weakly expressed in tongue, but not skin or in any other tissues or organs examined.

Miscellaneous. There are two types of cytoskeletal and microfibrillar keratin, I (acidic) and II (neutral to basic) (40-55 and 56-70 kDa, respectively).

Similarity. Belongs to the intermediate filament family.

Isoforms (3)

UniProt IDNamesCanonical?
Q6KB66-11yes
Q6KB66-22
Q6KB66-33

RefSeq proteins (2): NP_001074961, NP_872313* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR003054Keratin_IIFamily
IPR039008IF_rod_domDomain

Pfam: PF00038

UniProt features (18 total): region of interest 8, splice variant 3, modified residue 2, chain 1, domain 1, site 1, sequence variant 1, sequence conflict 1

Structure

Experimental structures (PDB)

0 structures.

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q6KB66-F176.930.56

Functional residue map

Curated UniProt residues grouped by drug-discovery relevance — catalytic, ligand-binding, modification, and mutation-validated positions. Source: UniProtKB sequence features.

Catalytic / active sites (1): 334 (stutter)

Post-translational modifications (2): 45, 396

Function

Pathways and Gene Ontology

Reactome pathways

3 pathways

IDPathway
R-HSA-6805567Keratinization
R-HSA-6809371Formation of the cornified envelope
R-HSA-1266738Developmental Biology

MSigDB gene sets: 129 (showing top): GSE45365_CD8A_DC_VS_CD11B_DC_IFNAR_KO_MCMV_INFECTION_UP, RODRIGUES_THYROID_CARCINOMA_ANAPLASTIC_UP, GOBP_EPITHELIUM_DEVELOPMENT, GOBP_INTERMEDIATE_FILAMENT_BASED_PROCESS, GOBP_INTERMEDIATE_FILAMENT_ORGANIZATION, SENESE_HDAC1_AND_HDAC2_TARGETS_DN, GOBP_EPIDERMAL_CELL_DIFFERENTIATION, RICKMAN_TUMOR_DIFFERENTIATED_WELL_VS_POORLY_DN, GATA3_01, GOBP_EPIDERMIS_DEVELOPMENT, TGAGATT_MIR216, BASAKI_YBX1_TARGETS_UP, GOBP_KERATINIZATION, CERVERA_SDHB_TARGETS_1_UP, GOCC_CELL_CELL_JUNCTION

GO Biological Process (2): keratinization (GO:0031424), intermediate filament organization (GO:0045109)

GO Molecular Function (2): structural constituent of skin epidermis (GO:0030280), protein binding (GO:0005515)

GO Cellular Component (5): cytoplasm (GO:0005737), cytosol (GO:0005829), intermediate filament (GO:0005882), keratin filament (GO:0045095), intermediate filament cytoskeleton (GO:0045111)

Reactome top-level categories

Rollup of top-2 pathways:

CategoryPathways
Developmental Biology1
Keratinization1

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
cellular anatomical structure2
keratinocyte differentiation1
multicellular organismal process1
intermediate filament cytoskeleton organization1
supramolecular fiber organization1
structural molecule activity1
binding1
intracellular anatomical structure1
cytoplasm1
intermediate filament cytoskeleton1
polymeric cytoskeletal fiber1
intermediate filament1
cytoskeleton1

Protein interactions and networks

STRING

965 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
KRT80TINCRA0A2R8Y7D0639
KRT80CDSNQ15517532
KRT80KRTAP3-1Q9BYR8530
KRT80TGM3Q08188519
KRT80KRTDAPP60985513
KRT80CNFNQ9BYD5503
KRT80SOWAHAQ2M3V2458
KRT80PIERCE1Q5BN46447
KRT80STAU1O95793408
KRT80ALOX12BO75342400
KRT80CFTRP13569386
KRT80C11orf86A6NJI1386
KRT80CRNNQ9UBG3384
KRT80MLANAQ16655384
KRT80KRTAP15-1Q3LI76367
KRT80LCE2DQ5TA82367

IntAct

35 interactions, top by confidence:

ABTypeScore
CFTRESYT2psi-mi:“MI:0914”(association)0.710
MEOX2KRT80psi-mi:“MI:0915”(physical association)0.560
KRT15KRT80psi-mi:“MI:0915”(physical association)0.560
KRT80KRT20psi-mi:“MI:0915”(physical association)0.560
KRT80MEOX2psi-mi:“MI:0915”(physical association)0.560
KRT20KRT80psi-mi:“MI:0915”(physical association)0.560
KRT80KRT15psi-mi:“MI:0915”(physical association)0.560
repKRT80psi-mi:“MI:0915”(physical association)0.490
METTL14HMGB1P1psi-mi:“MI:0914”(association)0.350
TANKCNOT1psi-mi:“MI:0914”(association)0.350
TRAF2TMEM178Bpsi-mi:“MI:0914”(association)0.350
COPS5FBLL1psi-mi:“MI:0914”(association)0.350
LRRK2psi-mi:“MI:0914”(association)0.350
RNLSSTATHpsi-mi:“MI:0914”(association)0.350
STYXBANF1psi-mi:“MI:0914”(association)0.350
BMI1MEIS3P1psi-mi:“MI:0914”(association)0.350
GABARAPL2psi-mi:“MI:0914”(association)0.350
KRT80CYP17A1psi-mi:“MI:0914”(association)0.350
SULF2HNRNPCL1psi-mi:“MI:0914”(association)0.350
SULF2IGHA1psi-mi:“MI:0914”(association)0.350
LGALS3BPIGHV3-64Dpsi-mi:“MI:0914”(association)0.350

BioGRID (70): KRT80 (Two-hybrid), KRT80 (Two-hybrid), KRT80 (Two-hybrid), KRT80 (Affinity Capture-MS), KRT80 (Affinity Capture-MS), KRT80 (Affinity Capture-MS), KRT80 (Affinity Capture-MS), KRT80 (Affinity Capture-MS), KRT80 (Affinity Capture-MS), KRT80 (Affinity Capture-MS), KRT80 (Affinity Capture-MS), KRT80 (Affinity Capture-MS), KRT80 (Affinity Capture-MS), KRT80 (Affinity Capture-MS), KRT80 (Affinity Capture-MS)

ESM2 similar proteins: A0JND2, A3KN27, A6BLY7, A6H712, A6QNX5, A6QQJ3, A7YWK3, D3ZER2, E1AB55, O76014, O76015, P08552, P15331, P21807, P35617, P41219, P46660, P48670, Q0VBK2, Q13515, Q148H5, Q148H6, Q148H8, Q14CN4, Q28177, Q3SY84, Q3TRJ4, Q6A162, Q6IFW3, Q6IFW8, Q6IFX0, Q6IFX4, Q6IFZ9, Q6IG04, Q6IME9, Q6IMF1, Q6KB66, Q6NVD9, Q6NXH9, Q7RTS7

Diamond homologs: A0A125S9M6, A0JND2, A4FUZ0, A5A6M8, A6NCN2, A7YWK3, O43790, P02542, P02545, P02547, P02548, P04104, P04260, P04261, P04262, P04263, P07196, P07744, P08551, P08928, P09010, P10999, P12035, P12036, P13647, P13648, P15241, P16884, P19013, P19246, P19527, P21619, P21910, P25691, P35908, P48671, P48672, P48678, P48679, P78385

SIGNOR signaling

0 interactions.

Disease & clinical

Clinical variants and AI predictions

ClinVar

94 variants total. Per-class counts are floors (≥ shown; pagination cap):

ClassificationCount (floor)
Pathogenic0
Likely pathogenic0
Uncertain significance78
Likely benign3
Benign3

Top pathogenic / likely-pathogenic (0)

SpliceAI

1251 predictions. Top by Δscore:

VariantEffectΔscore
12:52172193:CTCA:Cdonor_loss1.0000
12:52172194:TCAC:Tdonor_loss1.0000
12:52172196:AC:Adonor_loss1.0000
12:52172197:CCT:Cdonor_loss1.0000
12:52172223:T:TAdonor_gain1.0000
12:52172414:AGGCA:Aacceptor_gain1.0000
12:52172415:GGCA:Gacceptor_gain1.0000
12:52172416:GCA:Gacceptor_gain1.0000
12:52172417:CA:Cacceptor_gain1.0000
12:52172417:CAC:Cacceptor_gain1.0000
12:52172419:C:CCacceptor_gain1.0000
12:52172419:C:CGacceptor_loss1.0000
12:52172420:T:Aacceptor_loss1.0000
12:52172422:C:CTacceptor_gain1.0000
12:52172423:A:Tacceptor_gain1.0000
12:52172426:C:CTacceptor_gain1.0000
12:52172426:C:Tacceptor_gain1.0000
12:52172427:A:Tacceptor_gain1.0000
12:52173032:A:ACdonor_gain1.0000
12:52173033:C:CCdonor_gain1.0000
12:52173034:TCA:Tdonor_loss1.0000
12:52173036:A:ACdonor_gain1.0000
12:52173037:C:CTdonor_gain1.0000
12:52173037:CA:Cdonor_gain1.0000
12:52173037:CAT:Cdonor_gain1.0000
12:52173037:CATG:Cdonor_gain1.0000
12:52173037:CATGG:Cdonor_gain1.0000
12:52173159:TCCAG:Tacceptor_gain1.0000
12:52173160:CCAG:Cacceptor_gain1.0000
12:52173160:CCAGC:Cacceptor_gain1.0000

AlphaMissense

2947 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
12:52180906:C:AK189N0.991
12:52180906:C:GK189N0.991
12:52180940:C:GR178P0.982
12:52173090:A:GL302P0.978
12:52191621:A:CF94L0.977
12:52191621:A:TF94L0.977
12:52191623:A:GF94L0.977
12:52180910:A:GL188P0.974
12:52180924:G:CF183L0.974
12:52180924:G:TF183L0.974
12:52180926:A:GF183L0.974
12:52173066:C:GR310P0.973
12:52173069:A:GL309P0.973
12:52173623:C:GA270P0.971
12:52180604:A:GL192P0.969
12:52180583:C:GR199P0.968
12:52172355:C:GA341P0.965
12:52185418:A:GL157P0.962
12:52180574:A:GL202P0.960
12:52180907:T:GK189T0.960
12:52172270:A:GL369P0.959
12:52172388:C:GA330P0.959
12:52185385:C:GR168P0.956
12:52173751:A:GL227P0.954
12:52180918:A:CF185L0.951
12:52180918:A:TF185L0.951
12:52180920:A:GF185L0.951
12:52185568:C:GR107P0.947
12:52191622:A:CF94C0.946
12:52173760:A:GL224P0.945

dbSNP variants (sampled 300 via entrez): RS1000021514 (12:52181571 G>A), RS1000122956 (12:52186607 C>T), RS1000154114 (12:52186902 C>A), RS1000182835 (12:52190095 G>A,T), RS1000328087 (12:52192022 A>G), RS1000341502 (12:52170460 T>A,G), RS1000380979 (12:52170559 A>C), RS1000390758 (12:52184965 C>T), RS1000783541 (12:52191331 G>T), RS1000845820 (12:52192227 G>A,C), RS1000922609 (12:52173317 C>G), RS1001069909 (12:52191033 C>T), RS1001079608 (12:52178726 G>A), RS1001180759 (12:52190971 G>A), RS1001237460 (12:52188291 A>T)

Disease associations

OMIM: gene MIM:611161 | disease phenotypes:

GenCC curated gene-disease

Mondo (0):

Orphanet (0):

HPO phenotypes

0 total (0 of 0 shown, HPO-id order):

GWAS associations

3 associations (top):

StudyTraitp-value
GCST002341_2Telomere length7.000000e-06
GCST002875_139Diisocyanate-induced asthma1.000000e-06
GCST011739_7Cutaneous leishmaniasis7.000000e-06

EFO canonical traits (1, from GWAS)

EFO IDTrait name
EFO:0006995response to diisocyanate

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

PharmGKB: 1 entry (VIP=true, CPIC=false)

CTD chemical–gene interactions

68 total (human), top 30 by PubMed support.

ChemicalActions (top 5)PubMed papers
(+)-JQ1 compounddecreases expression3
sodium arseniteaffects cotreatment, increases abundance, decreases expression2
perfluorooctane sulfonic aciddecreases expression, increases expression2
Arsenicaffects cotreatment, decreases expression, increases abundance2
Estradiolaffects cotreatment, decreases expression, increases expression2
Valproic Acidincreases expression, increases methylation2
Cyclosporinedecreases expression, increases expression2
Aflatoxin B1increases expression2
Particulate Matteraffects cotreatment, decreases expression, increases abundance, increases expression2
aristolochic acid Iincreases expression1
propionaldehydeincreases expression1
lead acetatedecreases expression1
sodium arsenatedecreases expression, increases abundance1
pyrogallol 1,3-dimethyl etheraffects localization, decreases expression, increases expression, affects cotreatment1
ethyl-p-hydroxybenzoateincreases expression1
sulforaphanedecreases expression1
butyraldehydeincreases expression1
manganese chlorideincreases abundance, affects cotreatment, decreases expression1
2,3-bis(3’-hydroxybenzyl)butyrolactoneaffects cotreatment, decreases expression1
hydroquinoneincreases expression1
S-(1,2-dichlorovinyl)cysteinedecreases expression, affects cotreatment1
pentanalincreases expression1
polyhexamethyleneguanidineaffects expression1
abrineincreases expression1
archazolid Bdecreases expression1
jinfukangaffects cotreatment, decreases expression1
NSC 689534affects binding, increases expression1
4-(4-((5-(4,5-dimethyl-2-nitrophenyl)-2-furanyl)methylene)-4,5-dihydro-3-methyl-5-oxo-1H-pyrazol-1-yl)benzoic aciddecreases expression1
Temozolomideincreases expression1
Sunitinibdecreases expression1

Clinical trials (associated diseases)

0 trials via MONDO — disease-level, not drug-specific.

  • Disease cohort memberships (association, not causation — diseases whose associated-gene cohort lists this gene; a subset are also under Associated diseases): cutaneous leishmaniasis