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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q96EG1: Variant p.Asp45Tyr

Arylsulfatase G
Gene: ARSG
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Variant information Variant position: help 45 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 Aspartate (D) to Tyrosine (Y) at position 45 (D45Y, p.Asp45Tyr). 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 medium size and acidic (D) to large size and aromatic (Y) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -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
Variant description: help In USH4; loss of sulfatase activity toward p-nitrocatechol sulfate; loss of processing of the precursor protein suggesting impaired transport to lysosomes. Any additional useful information about the variant.


Sequence information Variant position: help 45 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 525 The length of the canonical sequence.
Location on the sequence: help FCISGKTRGQKPNFVIILAD D MGWGDLGANWAETKDTANLD 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                         FCISGKTRGQKPNFVIILADDMGWGDLGANWAETKDTANLD

                              FCPSGETRGQKPNFVIILADDMGWGDLGANWAETKDTANLD

Mouse                         FSISGKTRAPQPNIVIILADDMGWGDLGANWAETKDTTNLD

Rat                           FSISGETRAPRPNIVIILADDMGWGDLGANWAETKDTTNLD
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 – 525 Arylsulfatase G
Binding site 44 – 44
Binding site 45 – 45



Literature citations
A homozygous founder missense variant in arylsulfatase G abolishes its enzymatic activity causing atypical Usher syndrome in humans.
Khateb S.; Kowalewski B.; Bedoni N.; Damme M.; Pollack N.; Saada A.; Obolensky A.; Ben-Yosef T.; Gross M.; Dierks T.; Banin E.; Rivolta C.; Sharon D.;
Genet. Med. 20:1004-1012(2018)
Cited for: INVOLVEMENT IN USH4; VARIANT USH4 TYR-45; CHARACTERIZATION OF VARIANT USH4 TYR-45; FUNCTION; CATALYTIC ACTIVITY; TISSUE SPECIFICITY;
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.