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UniProtKB/Swiss-Prot P06870: Variant p.Val193Glu

Kallikrein-1
Gene: KLK1
Chromosomal location: 19q13.4
Variant information

Variant position:  193
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Polymorphism
The variants are classified into three categories: Disease, Polymorphism and Unclassified.
  • Disease: Variants implicated in disease according to literature reports.
  • Polymorphism: Variants not reported to be implicated in disease.
  • Unclassified: Variants with uncertain implication in disease according to literature reports. Evidence against or in favor of a pathogenic role is limited and/or conflicting.

Residue change:  From Valine (V) to Glutamate (E) at position 193 (V193E, p.Val193Glu).
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:  Change from medium size and hydrophobic (V) to medium size and acidic (E)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -2
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

Polymorphism:  Genetic variations in KLK1 are the cause of a decreased in urinary kallikrein activity [MIM:615953]. The His-77 mutation dramatically reduces the activity of the enzyme in the urine. There is a 50 to 60% reduction in urinary kallikrein activity in His-77 individuals, but renal and hormonal adaptation to dietary changes in sodium and potassium are unaffected. However, in studies of brachial artery function, His-77 individuals consistently exhibited an increase in wall shear stress and a paradoxical reduction in artery diameter and lumen compared to Arg-77 individuals. This partial genetic deficiency in kallikrein activity is associated with a form of arterial dysfunction involving inappropriate inward remodeling of the brachial artery despite a chronic increase in shear stress.
Additional information on the polymorphism described.

Other resources:  
Links to websites of interest for the variant.



Sequence information

Variant position:  193
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  262
The length of the canonical sequence.

Location on the sequence:   QCVDLKILPNDECKKAHVQK  V TDFMLCVGHLEGGKDTCVGD
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.

Sequence annotation in neighborhood:  
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 25 – 262 Kallikrein-1
Domain 25 – 259 Peptidase S1
Disulfide bond 153 – 220
Disulfide bond 185 – 199


Literature citations

No reference for the current variant in UniProtKB/Swiss-Prot.

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.