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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P07949: Variant p.Ala883Phe

Proto-oncogene tyrosine-protein kinase receptor Ret
Gene: RET
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Variant information Variant position: help 883 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LP/P [Disclaimer] 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: help From Alanine (A) to Phenylalanine (F) at position 883 (A883F, p.Ala883Phe). 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: help Change from small size and hydrophobic (A) to large size and aromatic (F) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -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
Variant description: help In MEN2B; somatic mutation in sporadic medullary thyroid carcinoma; requires 2 nucleotide substitutions. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 883 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 1114 The length of the canonical sequence.
Location on the sequence: help QYLAEMKLVHRDLAARNILV A EGRKMKISDFGLSRDVYEED 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: help The multiple alignment of the region surrounding the variant against various orthologous sequences. 
Human                         QYLAEMKLVHRDLAARNILVAEGRKMKISDFGLSRDVYEED

Mouse                         QYLAEMKLVHRDLAARNILVAEGRKMKISDFGLSRDVYEED

Rat                           QYLAEMKLVHRDLAARNILVAEGRKMKISDFGLSRDVYEED
Sequence annotation in neighborhood: help 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 29 – 1114 Proto-oncogene tyrosine-protein kinase receptor Ret
Chain 708 – 1017 Soluble RET kinase fragment
Topological domain 658 – 1114 Cytoplasmic
Domain 724 – 1016 Protein kinase
Active site 874 – 874 Proton acceptor
Modified residue 900 – 900 Phosphotyrosine; by autocatalysis
Mutagenesis 708 – 1114 Missing. Loss of induced cell death, but increased cell aggregation.
Beta strand 880 – 883



Literature citations
Germline dinucleotide mutation in codon 883 of the RET proto-oncogene in multiple endocrine neoplasia type 2B without codon 918 mutation.
Gimm O.; Marsh D.J.; Andrew S.D.; Frilling A.; Dahia P.L.M.; Mulligan L.M.; Zajac J.D.; Robinson B.G.; Eng C.;
J. Clin. Endocrinol. Metab. 82:3902-3904(1997)
Cited for: VARIANT MEN2B PHE-883; Germline mutation of RET codon 883 in two cases of de novo MEN 2B.
Smith D.P.; Houghton C.; Ponder B.A.J.;
Oncogene 15:1213-1217(1997)
Cited for: VARIANT MEN2B PHE-883;
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.