UniProtKB/Swiss-Prot P31994: Variant p.Tyr258Asp

• Variant information
• Sequence information
• Literature citations
• All

Variant information

Variant position: 258 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 Tyrosine (Y) to Aspartate (D) at position 258 (Y258D, p.Tyr258Asp). 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 aromatic (Y) to medium size and acidic (D) 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
Polymorphism: FCGR2B polymorphisms can influence susceptibility or resistance to malaria [MIM:611162]. Additional information on the polymorphism described.
Other resources: Links to websites of interest for the variant.

• Variant rs148534844 [ dbSNP | Ensembl ]

Sequence information

Variant position: 258 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: 310 The length of the canonical sequence.
Location on the sequence: VAAVVALIYCRKKRISALPG Y PECREMGETLPEKPANPTNP 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.
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.

Type	Positions	Description
Chain	43 – 310	Low affinity immunoglobulin gamma Fc region receptor II-b
Topological domain	241 – 310	Cytoplasmic
Alternative sequence	254 – 272	Missing. In isoform IIB2 and isoform 5.

Literature citations

Interaction of a human Fc gamma RIIb1 (CD32) isoform with murine and human IgG subclasses.
Warmerdam P.A.; van den Herik-Oudijk I.E.; Parren P.W.; Westerdaal N.A.; van de Winkel J.G.; Capel P.J.;
Int. Immunol. 5:239-247(1993)
Cited for: VARIANT ASP-258;