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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P21815: Variant p.Arg219Gly

Integrin-binding sialoprotein
Gene: IBSP
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Variant information Variant position: help 219 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help 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: help From Arginine (R) to Glycine (G) at position 219 (R219G, p.Arg219Gly). 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 large size and basic (R) to glycine (G) 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

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


Sequence information Variant position: help 219 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 317 The length of the canonical sequence.
Location on the sequence: help EEGEEESVTGANAEDTTETG R QGKGTSKTTTSPNGGFEPTT 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                         EE--GEEESVTGANAEDTTETGRQGKGTSKTTTSPNGGFEPTT

Mouse                         EEAEAEEASVTEAGAEGTT-GGRELTSVGTQTAVLLNGFQQ

Rat                           EE--AEEASVTEAGAEGTTAGVRELTSYGTTTAVLLNGFQQ

Pig                           EE--GDQESVTEA--QGTTVAGEQDNGGAKTTTSPNGGLEP

Bovine                        EE-DGEEESVTEANTEGITVAG-------ETTTSPNGGFKP

Chicken                       ED--DDEEEEEEEEEEEEAEATTAAATTAQDEVTTLGDEQR

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 17 – 317 Integrin-binding sialoprotein
Region 58 – 254 Disordered
Compositional bias 210 – 254 Polar residues
Glycosylation 227 – 227 O-linked (GalNAc...) threonine
Glycosylation 228 – 228 O-linked (GalNAc...) threonine
Glycosylation 229 – 229 O-linked (GalNAc...) threonine
Glycosylation 238 – 238 O-linked (GalNAc...) threonine
Glycosylation 239 – 239 O-linked (GalNAc...) threonine



Literature citations
Human bone sialoprotein. Deduced protein sequence and chromosomal localization.
Fisher L.W.; McBride O.W.; Termine J.D.; Young M.F.;
J. Biol. Chem. 265:2347-2351(1990)
Cited for: NUCLEOTIDE SEQUENCE [MRNA]; VARIANTS GLY-213; GLY-219 AND VAL-268; The human bone sialoprotein gene (IBSP): genomic localization and characterization.
Kerr J.M.; Fisher L.W.; Termine J.D.; Wang M.G.; McBride W.; Young M.F.;
Genomics 17:408-415(1993)
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]; VARIANTS GLU-195; GLY-213; GLY-219 AND ASP-270;
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.