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UniProtKB/Swiss-Prot P48637: Variant p.Leu254Arg

Glutathione synthetase
Gene: GSS
Variant information

Variant position:  254
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 Leucine (L) to Arginine (R) at position 254 (L254R, p.Leu254Arg).
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 hydrophobic (L) to large size and basic (R)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -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:  In GSS deficiency.
Any additional useful information about the variant.



Sequence information

Variant position:  254
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  474
The length of the canonical sequence.

Location on the sequence:   VIRRTFEDISEKGSLDQDRR  L FVDGQEIAVVYFRDGYMPRQ
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                         VIRRTFEDISEKGSLDQDRR--LFVDG----QEIAVVYFRDGYMPRQ

Mouse                         VIRGRFEDVSERGSLDQNRR--LFMDD----QEVAVVYFRD

Rat                           VIRRRFEDVSERGSLDQNRR--LFMED----QEVAVVYFRD

Bovine                        VIRRKFEDVSEKGSLDQDRR--LFMDG----QEIAVVYFRD

Xenopus laevis                VIRRRLADVFERGTLDEERH--LFIDG----YEVAVAYFRT

Slime mold                    LIRRTMKEINQCAKLDEENGSVLIVDG----MEISVAYYRA

Baker's yeast                 SVRLTFDDVNDKLFIDDKTGK-LFIRD--TEQEIAVVYYRT

Fission yeast                 SKRIDIAELNS-LIHDKSSNK-LYMKTSFTTYEVAVVYYRV

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 2 – 474 Glutathione synthetase
Beta strand 254 – 256


Literature citations

Missense mutations in the human glutathione synthetase gene result in severe metabolic acidosis, 5-oxoprolinuria, hemolytic anemia and neurological dysfunction.
Dahl N.; Pigg M.; Ristoff E.; Gali R.; Carlsson B.; Mannervik B.; Larsson A.; Board P.;
Hum. Mol. Genet. 6:1147-1152(1997)
Cited for: VARIANTS GSS DEFICIENCY ASP-26; PRO-188; GLY-219; ARG-254; TRP-267; CYS-270; HIS-270; CYS-283; GLN-286; CYS-330; VAL-464 AND GLU-469; CHARACTERIZATION OF VARIANTS GSS DEFICIENCY PRO-188; CYS-270; HIS-270 AND CYS-283; FUNCTION; CATALYTIC ACTIVITY; PATHWAY;

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.