UniProtKB/Swiss-Prot P00748: Variant p.Leu414Met

Coagulation factor XII
Gene: F12
Chromosomal location: 5q11
Variant information

Variant position:  414
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Disease [Disclaimer]
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 Leucine (L) to Methionine (M) at position 414 (L414M, p.Leu414Met).
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:  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:  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

Involvement in disease:  Factor XII deficiency (FA12D) [MIM:234000]: An asymptomatic anomaly of in vitro blood coagulation. Its diagnosis is based on finding a low plasma activity of the factor in coagulating assays. It is usually only accidentally discovered through pre-operative blood tests. Factor XII deficiency is divided into two categories, a cross-reacting material (CRM)-negative group (negative F12 antigen detection) and a CRM-positive group (positive F12 antigen detection). {ECO:0000269|PubMed:10361128, ECO:0000269|PubMed:11776307, ECO:0000269|PubMed:15205584, ECO:0000269|PubMed:15617741, ECO:0000269|PubMed:2510163, ECO:0000269|PubMed:2882793, ECO:0000269|PubMed:8049433, ECO:0000269|PubMed:8528215, ECO:0000269|PubMed:9354665}. Note=The disease is caused by mutations affecting the gene represented in this entry.
The name and a short description of the disease associated with the variant. For more information about the disease, the user can refer to OMIM, following the link provided after the disease acronym.

Variant description:  In FA12D; CRM-negative phenotype.
Any additional useful information about the variant.

Sequence information

Variant position:  414
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  615
The length of the canonical sequence.

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: 
The multiple alignment of the region surrounding the variant against various orthologous sequences.






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.

Chain 373 – 615 Coagulation factor XIIa light chain
Domain 373 – 614 Peptidase S1
Active site 412 – 412 Charge relay system
Glycosylation 433 – 433 N-linked (GlcNAc...) asparagine
Disulfide bond 359 – 486
Disulfide bond 405 – 475
Helix 411 – 414

Literature citations

Mutations in the human factor XII gene.
Schloesser M.; Zeerleder S.; Lutze G.; Halbmayer W.-M.; Hofferbert S.; Hinney B.; Koestering H.; Laemmle B.; Pindur G.; Thies K.; Koehler M.; Engel W.;
Blood 90:3967-3977(1997)
Cited for: VARIANTS FA12D MET-414; GLN-417; ASN-461 AND ARG-589;

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.