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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q96NT5: Variant p.Arg113Cys

Proton-coupled folate transporter
Gene: SLC46A1
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Variant information Variant position: help 113 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 Arginine (R) to Cysteine (C) at position 113 (R113C, p.Arg113Cys). 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 large size and basic (R) to medium size and polar (C) 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 HFM; loss-of-function mutation; targeted to the plasma membrane but has significantly impaired folate transport activity. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 113 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 459 The length of the canonical sequence.
Location on the sequence: help GFLVGLFSSTLLGAWSDSVG R RPLLVLASLGLLLQALVSVF 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                         GFLVGLFSSTLLGAWSDSVGRRPLLVLASLGLLLQALVSVF

Mouse                         GFLVGLFWSTLLGAWSDRVGRRPLLVLASLGLLLQAVVSIF

Rat                           GFLVGLFWSTLLGAWSDRVGRRPLLVLASLGLLLQAVVSIF

Bovine                        GFLVGLFSSTLLGAWSDCVGRRPLLVLASLGLLLQTVLSIF

Chicken                       GFFVGLFSVTLFGPWSDSVGRRPVLVLPAVGMAVQAAVYLL

Xenopus laevis                GFLVGLFSVMLLGPWSDKVGRRPVLMLPCIGLALQAAVYLL

Zebrafish                     GFLVGLFMVILLGSWSDRAGRRLVLIIPSLGLAVQAAVYLT
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 – 459 Proton-coupled folate transporter
Transmembrane 113 – 135 Helical; Name=TM3
Disulfide bond 66 – 298
Mutagenesis 109 – 109 D -> AGEKNS. Loss of methotrexate uptake.
Mutagenesis 109 – 109 D -> A. Complete loss of transport function.



Literature citations
A novel loss-of-function mutation in the proton-coupled folate transporter from a patient with hereditary folate malabsorption reveals that Arg 113 is crucial for function.
Lasry I.; Berman B.; Straussberg R.; Sofer Y.; Bessler H.; Sharkia M.; Glaser F.; Jansen G.; Drori S.; Assaraf Y.G.;
Blood 112:2055-2061(2008)
Cited for: VARIANT HFM CYS-113; CHARACTERIZATION OF VARIANT HFM CYS-113;
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.