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UniProtKB/Swiss-Prot P00451: Variant p.Arg391His

Coagulation factor VIII
Gene: F8
Variant information

Variant position:  391
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 Arginine (R) to Histidine (H) at position 391 (R391H, p.Arg391His).
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 large size and basic (R) to medium size and polar (H)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  0
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:  In HEMA; Kumamoto; mild/moderate; abolishes the normal cleavage by thrombin.
Any additional useful information about the variant.

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

Sequence information

Variant position:  391
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  2351
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 20 – 2351 Coagulation factor VIII
Chain 20 – 1332 Factor VIIIa heavy chain, 200 kDa isoform
Chain 20 – 759 Factor VIIIa heavy chain, 92 kDa isoform
Site 391 – 392 Cleavage; by thrombin
Alternative sequence 9 – 2143 Missing. In isoform 2.

Literature citations

Direct characterization of factor VIII in plasma: detection of a mutation altering a thrombin cleavage site (arginine-372-->histidine).
Arai M.; Inaba H.; Higuchi M.; Antonarakis S.E.; Kazazian H.H. Jr.; Fujimaki M.; Hoyer L.W.;
Proc. Natl. Acad. Sci. U.S.A. 86:4277-4281(1989)
Cited for: VARIANT HEMA HIS-391;

Spectrum of mutations in CRM-positive and CRM-reduced hemophilia A.
McGinniss M.J.; Kazazian H.H. Jr.; Hoyer L.W.; Bi L.; Inaba H.; Antonarakis S.E.;
Genomics 15:392-398(1993)
Cited for: VARIANTS HEMA LEU-308; HIS-391; TRP-546; PHE-577; ALA-653; MET-653; PHE-671 DEL; LYS-1460 AND CYS-2178;

A domain mutations in 65 haemophilia A families and molecular modelling of dysfunctional factor VIII proteins.
Liu M.; Murphy M.E.P.; Thompson A.R.;
Br. J. Haematol. 103:1051-1060(1998)
Cited for: VARIANTS HEMA LYS-98; GLY-101; CYS-133; HIS-145; ALA-159; LYS-163; ASP-164; PRO-179; MET-181; LYS-291; ALA-297; GLU-303; SER-312; HIS-391; ILE-427; TRP-437; ASN-450; ILE-454; LEU-470; SER-541; TRP-546; CYS-550; HIS-550; PRO-553; THR-560; ALA-578; ARG-603; ILE-633; ASN-683; LEU-721; CYS-742; THR-1698; GLY-1715; ARG-1779; THR-1791; HIS-1800; ALA-1801; PHE-1901; GLN-1960; GLN-1985; ILE-2007; TRP-2016; ASP-2022; ASN-2030 AND SER-2038;

High throughput mutation screening of the factor VIII gene (F8C) in hemophilia A: 37 novel mutations and genotype-phenotype correlation.
Citron M.; Godmilow L.; Ganguly T.; Ganguly A.;
Hum. Mutat. 20:267-274(2002)
Cited for: VARIANTS HEMA TRP-172; LYS-291; CYS-301; ALA-345; HIS-391; VAL-439; CYS-442; LEU-470; GLY-532; MET-653; CYS-683; LYS-1336; HIS-1708; PRO-1875; ARG-1877; ILE-1965; PHE-2117; CYS-2182; TRP-2185; LEU-2224; GLU-2251; LEU-2290; CYS-2323 AND TYR-2345;

Thirty-four novel mutations detected in factor VIII gene by multiplex CSGE: modeling of 13 novel amino acid substitutions.
Habart D.; Kalabova D.; Novotny M.; Vorlova Z.;
J. Thromb. Haemost. 1:773-781(2003)
Cited for: VARIANTS HEMA ARG-26; PRO-326; PHE-329; HIS-391; GLY-401; TYR-522; THR-540; TRP-546; TYR-588; CYS-683; SER-720; TYR-1066; HIS-1768; PRO-1771; HIS-1800; ASP-1904; PRO-1980; CYS-2169; HIS-2169; ASP-2174; CYS-2178; HIS-2178; CYS-2182; GLY-2228; PHE-2229; LEU-2319; CYS-2323; HIS-2323 AND SER-2345;

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.