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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q86SX6: Variant p.Leu148Ser

Glutaredoxin-related protein 5, mitochondrial
Gene: GLRX5
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Variant information Variant position: help 148 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 Leucine (L) to Serine (S) at position 148 (L148S, p.Leu148Ser). 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 hydrophobic (L) to small size and polar (S) 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 SIDBA3; deficiency in Fe-S cluster synthesis; does not impair ISCU binding. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 148 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 157 The length of the canonical sequence.
Location on the sequence: help MHQNGDLVEELKKLGIHSAL L DEKKDQDSK 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.
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 32 – 157 Glutaredoxin-related protein 5, mitochondrial
Modified residue 156 – 156 Phosphoserine
Turn 146 – 148



Literature citations
Heterozygous missense mutations in the GLRX5 gene cause sideroblastic anemia in a Chinese patient.
Liu G.; Guo S.; Anderson G.J.; Camaschella C.; Han B.; Nie G.;
Blood 124:2750-2751(2014)
Cited for: VARIANTS SIDBA3 GLN-101 AND SER-148; Functional analysis of GLRX5 mutants reveals distinct functionalities of GLRX5 protein.
Liu G.; Wang Y.; Anderson G.J.; Camaschella C.; Chang Y.; Nie G.;
J. Cell. Biochem. 117:207-217(2016)
Cited for: CHARACTERIZATION OF VARIANTS SIDBA3 GLN-101 AND SER-148; INTERACTION WITH ISCU;
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.