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UniProtKB/Swiss-Prot P54760: Variant p.Ile782Ser

Ephrin type-B receptor 4
Gene: EPHB4
Chromosomal location: 7q22
Variant information

Variant position:  782
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 Isoleucine (I) to Serine (S) at position 782 (I782S, p.Ile782Ser).
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 (I) to small size and polar (S)
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:  Lymphatic malformation 7 (LMPHM7) [MIM:617300]: A form of primary lymphedema, a disease characterized by swelling of body parts due to developmental anomalies and functional defects of the lymphatic system. Patients with lymphedema may suffer from recurrent local infections. LMPHM7 is an autosomal dominant form with variable expressivity. Some individuals present with severe non-immune hydrops fetalis, which may cause perinatal demise or fully resolve after the neonatal period. Others present with no edema and have milder clinical features, such as atrial septal defect or varicose veins as adults. {ECO:0000269|PubMed:27400125}. 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 LMPHM7; loss of kinase activity.
Any additional useful information about the variant.

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



Sequence information

Variant position:  782
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  987
The length of the canonical sequence.

Location on the sequence:   SRFLEENSSDPTYTSSLGGK  I PIRWTAPEAIAFRKFTSASD
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                         SRFLEENSSDPTYTSSLGGKIPIRWTAPEAIAFRKFTSASD

Mouse                         SRFLEENSSDPTYTSSLGGKIPIRWTAPEAIAFRKFTSASD

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 16 – 987 Ephrin type-B receptor 4
Topological domain 561 – 987 Cytoplasmic
Domain 615 – 899 Protein kinase
Modified residue 769 – 769 Phosphoserine
Modified residue 770 – 770 Phosphoserine
Alternative sequence 307 – 987 Missing. In isoform 3.
Alternative sequence 415 – 987 Missing. In isoform 4.
Alternative sequence 517 – 987 Missing. In isoform 2.


Literature citations

EPHB4 kinase-inactivating mutations cause autosomal dominant lymphatic-related hydrops fetalis.
Martin-Almedina S.; Martinez-Corral I.; Holdhus R.; Vicente A.; Fotiou E.; Lin S.; Petersen K.; Simpson M.A.; Hoischen A.; Gilissen C.; Jeffery H.; Atton G.; Karapouliou C.; Brice G.; Gordon K.; Wiseman J.W.; Wedin M.; Rockson S.G.; Jeffery S.; Mortimer P.S.; Snyder M.P.; Berland S.; Mansour S.; Makinen T.; Ostergaard P.;
J. Clin. Invest. 126:3080-3088(2016)
Cited for: INVOLVEMENT IN LMPHM7; VARIANTS LMPHM7 GLN-739 AND SER-782; CHARACTERIZATION OF VARIANTS LMPHM7 GLU-739 AND SER-782; FUNCTION;

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.