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UniProtKB/Swiss-Prot P16144: Variant p.Cys562Arg

Integrin beta-4
Gene: ITGB4
Chromosomal location: 17q11-qter
Variant information

Variant position:  562
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 Cysteine (C) to Arginine (R) at position 562 (C562R, p.Cys562Arg).
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 polar (C) to large size and basic (R)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -3
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:  Epidermolysis bullosa letalis, with pyloric atresia (EB-PA) [MIM:226730]: An autosomal recessive, frequently lethal, epidermolysis bullosa with variable involvement of skin, nails, mucosa, and with variable effects on the digestive system. It is characterized by mucocutaneous fragility, aplasia cutis congenita, and gastrointestinal atresia, which most commonly affects the pylorus. Pyloric atresia is a primary manifestation rather than a scarring process secondary to epidermolysis bullosa. {ECO:0000269|PubMed:10873890, ECO:0000269|PubMed:11251584, ECO:0000269|PubMed:11328943, ECO:0000269|PubMed:9422533, ECO:0000269|PubMed:9546354, ECO:0000269|PubMed:9792864, ECO:0000269|PubMed:9892956}. 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 EB-PA; mild form.
Any additional useful information about the variant.

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



Sequence information

Variant position:  562
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  1822
The length of the canonical sequence.

Location on the sequence:   QCPRTSGFLCNDRGRCSMGQ  C VCEPGWTGPSCDCPLSNATC
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.

Human                         QCPRTSGFLCNDRGRCSMGQCVCEPGWTGPSCDCPLSNATC

Mouse                         QCPRTSGFLCNDRGRCSMGECVCEPGWTGRSCDCPLSNATC

Rat                           QCPRTSGFLCNDRGRCSMGECVCEPGWTGRSCDCPLSNATC

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 28 – 1822 Integrin beta-4
Topological domain 28 – 710 Extracellular
Repeat 543 – 581 III
Region 456 – 619 Cysteine-rich tandem repeats
Glycosylation 579 – 579 N-linked (GlcNAc...) asparagine
Disulfide bond 424 – 671
Disulfide bond 557 – 562


Literature citations

Novel ITGB4 mutations in lethal and nonlethal variants of epidermolysis bullosa with pyloric atresia: missense versus nonsense.
Pulkkinen L.; Rouan F.; Bruckner-Tuderman L.; Wallerstein R.; Garzon M.; Brown T.; Smith L.; Carter W.G.; Uitto J.;
Am. J. Hum. Genet. 63:1376-1387(1998)
Cited for: VARIANTS EB-PA TYR-61; CYS-252; ARG-562 AND TRP-1281;

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.