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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P04070: Variant p.Val420Leu

Vitamin K-dependent protein C
Gene: PROC
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Variant information Variant position: help 420 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 420 (V420L, p.Val420Leu). 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 THPH3; also found in patients with PROC deficiency; decrease in vitamin-K dependent serine protease activity. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 420 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 461 The length of the canonical sequence.
Location on the sequence: help GDSGGPMVASFHGTWFLVGL V SWGEGCGLLHNYGVYTKVSR 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: 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 43 – 461 Vitamin K-dependent protein C
Chain 200 – 461 Vitamin K-dependent protein C heavy chain
Domain 212 – 450 Peptidase S1
Active site 402 – 402 Charge relay system
Disulfide bond 398 – 426
Beta strand 413 – 422



Literature citations
Genetic background analysis of protein C deficiency demonstrates a recurrent mutation associated with venous thrombosis in Chinese population.
Tang L.; Guo T.; Yang R.; Mei H.; Wang H.; Lu X.; Yu J.; Wang Q.; Hu Y.;
PLoS ONE 7:E35773-E35773(2012)
Cited for: VARIANTS GLU-70; GLY-106; ALA-118; TYR-175; VAL-181; TRP-189; GLN-211; TRP-220; ARG-223; GLY-240; HIS-297; LEU-312; VAL-327 AND LEU-420; Compound heterozygous protein C deficiency in a family with venous thrombosis: Identification and in vitro study of p.Asp297His and p.Val420Leu mutations.
Liu H.; Wang H.F.; Tang L.; Yang Y.; Wang Q.Y.; Zeng W.; Wu Y.Y.; Cheng Z.P.; Hu B.; Guo T.; Hu Y.;
Gene 563:35-40(2015)
Cited for: VARIANTS THPH3 HIS-297 AND LEU-420; CHARACTERIZATION OF VARIANTS THPH3 HIS-297 AND LEU-420; SUBCELLULAR LOCATION;
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.