rs200401846
Variant summary
Our verdict is Pathogenic. Variant got 15 ACMG points: 15P and 0B. PM1PM2PP2PP3_ModeratePP5_Very_Strong
The NM_000343.4(SLC5A1):c.1370A>G(p.Gln457Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000404 in 1,461,754 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q457H) has been classified as Uncertain significance.
Frequency
Consequence
NM_000343.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Pathogenic. Variant got 15 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
SLC5A1 | NM_000343.4 | c.1370A>G | p.Gln457Arg | missense_variant | 12/15 | ENST00000266088.9 | |
SLC5A1 | NM_001256314.2 | c.989A>G | p.Gln330Arg | missense_variant | 11/14 | ||
SLC5A1 | XM_011530331.2 | c.1281-2750A>G | intron_variant |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
SLC5A1 | ENST00000266088.9 | c.1370A>G | p.Gln457Arg | missense_variant | 12/15 | 1 | NM_000343.4 | P1 | |
SLC5A1 | ENST00000543737.2 | c.989A>G | p.Gln330Arg | missense_variant | 11/14 | 2 | |||
SLC5A1 | ENST00000477969.1 | n.536A>G | non_coding_transcript_exon_variant | 4/5 | 3 |
Frequencies
GnomAD3 genomes ? Cov.: 31
GnomAD3 exomes AF: 0.0000676 AC: 17AN: 251456Hom.: 0 AF XY: 0.0000883 AC XY: 12AN XY: 135910
GnomAD4 exome AF: 0.0000404 AC: 59AN: 1461754Hom.: 1 Cov.: 31 AF XY: 0.0000413 AC XY: 30AN XY: 727178
GnomAD4 genome ? Cov.: 31
ClinVar
Submissions by phenotype
SLC5A1-related disorder Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | PreventionGenetics, part of Exact Sciences | May 11, 2023 | The SLC5A1 c.1370A>G variant is predicted to result in the amino acid substitution p.Gln457Arg. This variant has been reported in the homozygous state in multiple related individuals with glucose-galactose malabsorption (GGM) and was shown to co-segregate with disease in a large pedigree (Lostao MP et al 2021. PubMed ID: 34485913). Functional studies suggest that Gln457 is a critical residue within the SLC5A1 sugar-binding site and that the p.Gln457Arg substitution causes a defect in glucose transport (Loo DDF et al. 1998. PubMed ID: 9636229, Diez-Sampedro A et al. 2001. PubMed ID: 11602601; Lostao MP et al 2021. PubMed ID: 34485913). This variant is reported in 0.014% of alleles in individuals of European (Finnish) descent in gnomAD (http://gnomad.broadinstitute.org/variant/22-32495259-A-G). This variant is interpreted as pathogenic. - |
Congenital glucose-galactose malabsorption Pathogenic:1
Likely pathogenic, criteria provided, single submitter | clinical testing | Invitae | May 06, 2021 | This variant is present in population databases (rs200401846, ExAC 0.02%). This sequence change replaces glutamine with arginine at codon 457 of the SLC5A1 protein (p.Gln457Arg). The glutamine residue is highly conserved and there is a small physicochemical difference between glutamine and arginine. This variant has been observed in individual(s) with clinical features of glucose-galactose malabsorption (PMID: 9815014, Invitae). In at least one individual the data is consistent with the variant being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 529229). In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. Experimental studies have shown that this variant affects SLC5A1 protein function ‚Äã(PMID: 12139397, 19167319). - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at