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UniProtKB/Swiss-Prot Q9H0P0: Variant p.Asp137Val

Cytosolic 5'-nucleotidase 3A
Gene: NT5C3A
Variant information

Variant position:  137
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  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:  From Aspartate (D) to Valine (V) at position 137 (D137V, p.Asp137Val).
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 medium size and acidic (D) to medium size and hydrophobic (V)
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

Variant description:  In P5ND; reduced catalytic activity.
Any additional useful information about the variant.

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

Sequence information

Variant position:  137
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  336
The length of the canonical sequence.

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.




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.

Chain 1 – 336 Cytosolic 5'-nucleotidase 3A
Binding site 135 – 135 CMP
Binding site 135 – 135 N(7)-methyl-GMP
Binding site 156 – 156 N(7)-methyl-GMP
Mutagenesis 135 – 135 E -> D. No effect on nucleotidase activity. Almost complete loss of phosphotransferase activity.

Literature citations

Genetic basis of hemolytic anemia caused by pyrimidine 5' nucleotidase deficiency.
Marinaki A.M.; Escuredo E.; Duley J.A.; Simmonds H.A.; Amici A.; Naponelli V.; Magni G.; Seip M.; Ben-Bassat I.; Harley E.H.; Thein S.L.; Rees D.C.;
Blood 97:3327-3332(2001)

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;

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.