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Keratin 31
Symbols KRT31 ; HA1; Ha-1; KRTHA1; hHa1
External IDs OMIM601077 MGI1309993 HomoloGene74433 GeneCards: KRT31 Gene
RNA expression pattern
PBB GE KRT31 206677 at tn.png
PBB GE KRT31 208483 x at tn.png
More reference expression data
Species Human Mouse
Entrez 3881 16660
Ensembl ENSG00000094796 ENSMUSG00000048981
UniProt Q15323 Q61765
RefSeq (mRNA) NM_002277 NM_010659
RefSeq (protein) NP_002268 NP_034789
Location (UCSC) Chr 17:
41.39 – 41.4 Mb
Chr 11:
100.05 – 100.05 Mb
PubMed search [1] [2]

Keratin, type I cuticular Ha1 is a protein that in humans is encoded by the KRT31 gene.[1][2][3]

The protein encoded by this gene is a member of the keratin gene family. As a type I hair keratin, it is an acidic protein which heterodimerizes with type II keratins to form hair and nails. The type I hair keratins are clustered in a region of chromosome 17q12-q21 and have the same direction of transcription.[3]


  1. ^ Fink P, Rogers MA, Korge B, Winter H, Schweizer J (Dec 1995). "A cDNA encoding the human type I hair keratin hHal". Biochim Biophys Acta 1264 (1): 12–4. doi:10.1016/0167-4781(95)00122-w. PMID 7578244. 
  2. ^ Schweizer J, Bowden PE, Coulombe PA, Langbein L, Lane EB, Magin TM, Maltais L, Omary MB, Parry DA, Rogers MA, Wright MW (Jul 2006). "New consensus nomenclature for mammalian keratins". J Cell Biol 174 (2): 169–74. doi:10.1083/jcb.200603161. PMC 2064177. PMID 16831889. 
  3. ^ a b "Entrez Gene: KRT31 keratin 31". 

Further reading[edit]