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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q9H0P0: Variant p.Gly280Arg

Cytosolic 5'-nucleotidase 3A
Gene: NT5C3A
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Variant information Variant position: help 280 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 Glycine (G) to Arginine (R) at position 280 (G280R, p.Gly280Arg). 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 glycine (G) to large size and basic (R) 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 P5ND; greatly reduced catalytic activity. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 280 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 336 The length of the canonical sequence.
Location on the sequence: help TEYFNQLKDNSNIILLGDSQ G DLRMADGVANVEHILKIGYL 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                         TEYFNQLKDNSNIILLGDSQGDLRMADGVANVEHILKIGYL

Mouse                         TDYFSQLKDNSNIILLGDSQGDLRMADGVANVEHILKIGYL

Chicken                       TEYFKQLKDNSNIILLGDSQGDLSMADGVANVEHILKIGYL
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 1 – 336 Cytosolic 5'-nucleotidase 3A
Binding site 277 – 277
Modified residue 278 – 278 Phosphoserine
Helix 280 – 283



Literature citations
Functional analysis of pyrimidine 5'-nucleotidase mutants causing nonspherocytic hemolytic anemia.
Chiarelli L.R.; Bianchi P.; Fermo E.; Galizzi A.; Iadarola P.; Mattevi A.; Zanella A.; Valentini G.;
Blood 105:3340-3345(2005)
Cited for: CHARACTERIZATION OF P5ND VAL-137; PRO-181; SER-229 AND ARG-280; Evidence for essential catalytic determinants for human erythrocyte pyrimidine 5'-nucleotidase.
Amici A.; Ciccioli K.; Naponelli V.; Raffaelli N.; Magni G.;
Cell. Mol. Life Sci. 62:1613-1620(2005)
Cited for: FUNCTION; BIOPHYSICOCHEMICAL PROPERTIES; CATALYTIC ACTIVITY; CHARACTERIZATION OF VARIANTS P5ND SER-229 AND ARG-280; MUTAGENESIS OF ASP-88; PHE-89; ASP-90; GLU-135; ASP-232; PHE-233 AND ASP-234; Molecular basis of Japanese variants of pyrimidine 5'-nucleotidase deficiency.
Kanno H.; Takizawa T.; Miwa S.; Fujii H.;
Br. J. Haematol. 126:265-271(2004)
Cited for: VARIANTS P5ND PRO-181 AND ARG-280; IDENTIFICATION OF ISOFORM 4; TISSUE SPECIFICITY; CHARACTERIZATION OF VARIANTS P5ND PRO-181 AND ARG-280;
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.