Home  |  Contact

UniProtKB/Swiss-Prot P54762: Variant p.Arg973Trp

Ephrin type-B receptor 1
Gene: EPHB1
Variant information

Variant position:  973
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  LB/B
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:  From Arginine (R) to Tryptophan (W) at position 973 (R973W, p.Arg973Trp).
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 large size and aromatic (W)
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

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



Sequence information

Variant position:  973
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  984
The length of the canonical sequence.

Location on the sequence:   RIGITLAGHQKKILNSIHSM  R VQISQSPTAMA
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                         RIGITLAGHQKKILNSIHSMRVQISQSPTAMA

Mouse                         RIGVTLAGHQKKILSSIHSMRVQMNQSPSVMA

Rat                           RIGVTLAGHQKKILSSIHSMRVQMNQSPSVMA

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 18 – 984 Ephrin type-B receptor 1
Topological domain 564 – 984 Cytoplasmic
Domain 911 – 975 SAM
Alternative sequence 243 – 984 Missing. In isoform 3.
Helix 959 – 975


Literature citations

Nck recruitment to Eph receptor, EphB1/ELK, couples ligand activation to c-Jun kinase.
Stein E.; Huynh-Do U.; Lane A.A.; Cerretti D.P.; Daniel T.O.;
J. Biol. Chem. 273:1303-1308(1998)
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1); FUNCTION IN CELL ADHESION; FUNCTION IN JUN CASCADE ACTIVATION; INTERACTION WITH NCK1; MUTAGENESIS OF TYR-594 AND LYS-651; VARIANT TRP-973;

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.