Expasy logo

UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q7Z3Z0: Variant p.Val238Leu

Keratin, type I cytoskeletal 25
Gene: KRT25
Feedback?
Variant information Variant position: help 238 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LP/P [Disclaimer] The variants are classified into three categories: LP/P, LB/B and US.
  • LP/P: likely pathogenic or pathogenic.
  • LB/B: likely benign or benign.
  • US: uncertain significance
Residue change: help From Valine (V) to Leucine (L) at position 238 (V238L, p.Val238Leu). Indicates the amino acid change of the variant. The one-letter and three-letter codes for amino acids used in UniProtKB/Swiss-Prot are those adopted by the commission on Biochemical Nomenclature of the IUPAC-IUB.
Physico-chemical properties: help Similar physico-chemical property. Both residues are medium size and hydrophobic. The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 1 The score within a Blosum matrix for the corresponding wild-type to variant amino acid change. The log-odds score measures the logarithm for the ratio of the likelihood of two amino acids appearing by chance. The Blosum62 substitution matrix is used. This substitution matrix contains scores for all possible exchanges of one amino acid with another:
  • Lowest score: -4 (low probability of substitution).
  • Highest score: 11 (high probability of substitution).
More information can be found on the following page
Variant description: help In ARWH3; reduces keratin intermediate filamen formation; impairs cytoskeleton assembly. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 238 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 450 The length of the canonical sequence.
Location on the sequence: help KKNHKEEMQVLQCAAGGNVN V EMNAAPGVDLTVLLNNMRAE The residue change on the sequence. Unless the variant is located at the beginning or at the end of the protein sequence, both residues upstream (20) and downstream (20) of the variant will be shown.
Residue conservation: help The multiple alignment of the region surrounding the variant against various orthologous sequences. 
Human                         KKNHKEEMQVLQCAAGGNVNVEMNAAPGVDLTVLLNNMRAE

Chimpanzee                    KKNHKEEMQVLQCAAGGNVNVEMNAAPGVDLTVLLNNMRAE

Mouse                         KKNHKEEMQALQCAAGGNVNVEMNAAPGVDLTVLLNNMRAE

Rat                           KKNHKEEMQALQCAAGGNVNVEMNAAPGVDLTVLLNNMRAE

Bovine                        KKNHKEEMQVLQCAAGGNVNVEMNAAPGVDLTVLLNNMRAE

Goat                          KKNHKEEMQVLQCAAGGNVNVEMNAAPGVDLTVLLNNMRAE

Sheep                         KKNHKEEMQVLQCAAGGNVNVEMNAAPGVDLTVLLNNMRAE
Sequence annotation in neighborhood: help The regions or sites of interest surrounding the variant. In general the features listed are posttranslational modifications, binding sites, enzyme active sites, local secondary structure or other characteristics reported in the cited references. The "Sequence annotation in neighborhood" lines have a fixed format:
  • Type: the type of sequence feature.
  • Positions: endpoints of the sequence feature.
  • Description: contains additional information about the feature.
TypePositionsDescription
Chain 1 – 450 Keratin, type I cytoskeletal 25
Domain 79 – 394 IF rod
Region 229 – 251 Linker 12



Literature citations
Autosomal recessive hypotrichosis with woolly hair caused by a mutation in the keratin 25 gene expressed in hair follicles.
Zernov N.V.; Skoblov M.Y.; Marakhonov A.V.; Shimomura Y.; Vasilyeva T.A.; Konovalov F.A.; Abrukova A.V.; Zinchenko R.A.;
J. Invest. Dermatol. 136:1097-1105(2016)
Cited for: VARIANT ARWH3 LEU-238; CHARACTERIZATION OF VARIANT ARWH3 LEU-238; FUNCTION; SUBUNIT;
Disclaimer: Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. They are not in any way intended to be used as a substitute for professional medical advice, diagnostic, treatment or care.