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UniProtKB/Swiss-Prot P06028: Variant p.Ser84Thr

Glycophorin-B
Gene: GYPB
Variant information

Variant position:  84
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Polymorphism
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 Serine (S) to Threonine (T) at position 84 (S84T, p.Ser84Thr).
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 small size and polar (S) to medium size and polar (T)
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

Polymorphism:  Along with GYPA, GYPB is responsible for the MNS blood group system. The molecular basis of the S/s blood group antigen is a single variation in position 48; Thr-48 corresponds to s=MSN4 and Met-48 to S=MNS3.
Additional information on the polymorphism described.

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



Sequence information

Variant position:  84
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  91
The length of the canonical sequence.

Location on the sequence:   ILIILCVMAGIIGTILLISY  S IRRLIKA
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                         ILIILCVMAGIIGTILLISYSIRRLIKA

Chimpanzee                    ILIILCVMAGVIGTILLISYGIRLLIKA

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 20 – 91 Glycophorin-B
Topological domain 82 – 91 Cytoplasmic


Literature citations

Molecular cloning of a human glycophorin B cDNA: nucleotide sequence and genomic relationship to glycophorin A.
Siebert P.D.; Fukuda M.;
Proc. Natl. Acad. Sci. U.S.A. 84:6735-6739(1987)
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1); VARIANT THR-84;

Structural organization of glycophorin A and B genes: glycophorin B gene evolved by homologous recombination at Alu repeat sequences.
Kudo S.; Fukuda M.;
Proc. Natl. Acad. Sci. U.S.A. 86:4619-4623(1989)
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]; VARIANT THR-84;

The low-incidence MNS antigens M(v), s(D), and Mit arise from single amino acid substitutions on GPB.
Storry J.R.; Reid M.E.; MacLennan S.; Lubenko A.; Nortman P.;
Transfusion 41:269-275(2001)
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1); VARIANT M(V) SER-22; VARIANTS MIT MET-48 AND HIS-54; VARIANT S(D) ARG-58; VARIANT THR-84;

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.