Genetic Variant SLC5A2:p.Arg132Leu (chr16-31485820-G-T) – ACMG Classification: Likely_pathogenic (8 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM2PM5PP3_Strong

The NM_003041.4(SLC5A2):c.395G>T(p.Arg132Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,884 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R132S) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

SLC5A2
NM_003041.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 9.99

Publications

0 publications found

Variant links:

Genes affected

SLC5A2 (HGNC:11037): (solute carrier family 5 member 2) This gene encodes a member of the sodium glucose cotransporter family which are sodium-dependent glucose transport proteins. The encoded protein is the major cotransporter involved in glucose reabsorption in the kidney. Mutations in this gene are associated with renal glucosuria. Two transcript variants, one protein-coding and one not, have been found for this gene. [provided by RefSeq, Feb 2015]

SLC5A2 Gene-Disease associations (from GenCC):

familial renal glucosuria
Inheritance: AD, AR Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics, Labcorp Genetics (formerly Invitae)

SLC5A2 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr16-31485819-C-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 3580288.Status of the report is criteria_provided_single_submitter, 1 stars.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.962

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC5A2	NM_003041.4 link	c.395G>T	p.Arg132Leu	missense_variant	Exon 4 of 14	ENST00000330498.4	NP_003032.1	P31639-1
SLC5A2	XM_006721072.5 link	c.395G>T	p.Arg132Leu	missense_variant	Exon 4 of 13		XP_006721135.3	Q8WY15
SLC5A2	XM_024450402.2 link	c.395G>T	p.Arg132Leu	missense_variant	Exon 4 of 11		XP_024306170.2
SLC5A2	NR_130783.2 link	n.409G>T		non_coding_transcript_exon_variant	Exon 4 of 12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC5A2	ENST00000330498.4 link	c.395G>T	p.Arg132Leu	missense_variant	Exon 4 of 14	1	NM_003041.4	ENSP00000327943.3		P31639-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1460884

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726806

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33478

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.0000191

AC:

AN:

52440

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111996

Other (OTH)

AF:

0.00

AC:

AN:

60388

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.225

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.97

BayesDel_addAF

Pathogenic

0.56

BayesDel_noAF

Pathogenic

0.56

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.23

T;D

Eigen

Pathogenic

0.92

Eigen_PC

Pathogenic

0.81

FATHMM_MKL

Uncertain

0.94

LIST_S2

Pathogenic

1.0

D;D

M_CAP

Pathogenic

0.72

MetaRNN

Pathogenic

0.96

D;D

MetaSVM

Pathogenic

1.1

MutationAssessor

Pathogenic

4.0

.;H

PhyloP100

PrimateAI

Uncertain

0.69

PROVEAN

Pathogenic

-7.0

D;D

REVEL

Pathogenic

0.97

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

.;D

Vest4

0.97

MutPred

0.83

.;Loss of methylation at R132 (P = 0.0231);

MVP

1.0

MPC

0.94

ClinPred

1.0

GERP RS

4.8

Varity_R

0.92

gMVP

0.97

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over