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UniProtKB/Swiss-Prot P19235: Variant p.Asn487Ser

Erythropoietin receptor
Gene: EPOR
Variant information

Variant position:  487
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  US
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 Asparagine (N) to Serine (S) at position 487 (N487S, p.Asn487Ser).
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 (N) to small size and polar (S)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  1
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 ECYT1 and erythroleukemia.
Any additional useful information about the variant.

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

Sequence information

Variant position:  487
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  508
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.






Xenopus laevis                -----------GEHSPPPSPNFYQNS--PITNFLAPIYSQS

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 25 – 508 Erythropoietin receptor
Topological domain 274 – 508 Cytoplasmic
Site 485 – 485 Required for CrkL binding
Modified residue 468 – 468 Phosphotyrosine; by JAK2
Modified residue 485 – 485 Phosphotyrosine; by JAK2
Modified residue 489 – 489 Phosphotyrosine; by JAK2
Modified residue 504 – 504 Phosphotyrosine; by JAK2
Alternative sequence 242 – 508 Missing. In isoform EPOR-S.
Alternative sequence 329 – 508 Missing. In isoform EPOR-T.
Mutagenesis 468 – 468 Y -> F. No effect on STAT1/STAT3 nor STAT5 activity.

Literature citations

Missense mutation of the erythropoietin receptor is a rare event in human erythroid malignancies.
Le Couedic J.-P.; Mitjavila M.-T.; Villeval J.-L.; Feger F.; Gobert S.; Mayeux P.; Casadevall N.; Vainchenker W.;
Blood 87:1502-1511(1996)

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.