chr22-32043334-A-G

Position:

• chr22-32043334-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_000343.4(SLC5A1):​c.53A>G​(p.Glu18Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. E18E) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SLC5A1 NM_000343.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -1.77

Genes affected

SLC5A1 (HGNC:11036): (solute carrier family 5 member 1) This gene encodes a member of the sodium-dependent glucose transporter (SGLT) family. The encoded integral membrane protein is the primary mediator of dietary glucose and galactose uptake from the intestinal lumen. Mutations in this gene have been associated with glucose-galactose malabsorption. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jan 2012]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), SLC5A1. . Gene score misZ 1.833 (greater than the threshold 3.09). Trascript score misZ 3.1348 (greater than threshold 3.09). GenCC has associacion of gene with glucose-galactose malabsorption.
• BP4: Computational evidence support a benign effect (MetaRNN=0.11142528).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SLC5A1	NM_000343.4	c.53A>G	p.Glu18Gly	missense_variant	1/15	ENST00000266088.9
SLC5A1	XM_011530331.2	c.53A>G	p.Glu18Gly	missense_variant	1/12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC5A1	ENST00000266088.9	c.53A>G	p.Glu18Gly	missense_variant	1/15	1	NM_000343.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 23, 2024

The c.53A>G (p.E18G) alteration is located in exon 1 (coding exon 1) of the SLC5A1 gene. This alteration results from a A to G substitution at nucleotide position 53, causing the glutamic acid (E) at amino acid position 18 to be replaced by a glycine (G). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.088
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.47
CADD	Benign	0.44
DANN	Benign	0.75
DEOGEN2	Benign	0.072	T
Eigen	Benign	-1.6
Eigen_PC	Benign	-1.7
FATHMM_MKL	Benign	0.053	N
LIST_S2	Benign	0.31	T
M_CAP	Benign	0.027	D
MetaRNN	Benign	0.11	T
MetaSVM	Benign	-0.72	T
MutationAssessor	Benign	1.1	L
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.32	T
PROVEAN	Benign	-0.92	N
REVEL	Benign	0.14
Sift	Benign	0.26	T
Sift4G	Benign	0.24	T
Polyphen		0.010	B
Vest4		0.13
MutPred		0.30		Loss of disorder (P = 0.0873);
MVP		0.47
MPC		0.57
ClinPred		0.22	T
GERP RS		-6.3
Varity_R		0.037
gMVP		0.29

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr22-32439321;