Genetic Variant SLC9A8:p.Asn20Ser (chr20-49815040-A-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_015266.3(SLC9A8):c.59A>G(p.Asn20Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000125 in 1,600,104 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

SLC9A8
NM_015266.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 8.19

Variant links:

Genes affected

SLC9A8 (HGNC:20728): (solute carrier family 9 member A8) Sodium-hydrogen exchangers (NHEs), such as SLC9A8, are integral transmembrane proteins that exchange extracellular Na+ for intracellular H+. NHEs have multiple functions, including intracellular pH homeostasis, cell volume regulation, and electroneutral NaCl absorption in epithelia (Xu et al., 2008 [PubMed 18209477]).[supplied by OMIM, Apr 2009]

SLC9A8 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC9A8	NM_015266.3 link	c.59A>G	p.Asn20Ser	missense_variant	Exon 2 of 16	ENST00000361573.3	NP_056081.1	Q9Y2E8-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SLC9A8	ENST00000361573.3 link	c.59A>G	p.Asn20Ser	missense_variant	Exon 2 of 16	1	NM_015266.3	ENSP00000354966.2	Q9Y2E8-1
SLC9A8	ENST00000417961.5 link	c.59A>G	p.Asn20Ser	missense_variant	Exon 2 of 16	2		ENSP00000416418.1	Q9Y2E8-2
SLC9A8	ENST00000489787.1 link	n.88A>G		non_coding_transcript_exon_variant	Exon 2 of 2	3

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152012

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000484

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000208

AC:

AN:

240156

Hom.:

AF XY:

0.00

AC XY:

AN XY:

129880

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000317

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000140

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000117

AC:

AN:

1448092

Hom.:

Cov.:

AF XY:

0.00000695

AC XY:

AN XY:

719698

show subpopulations

Gnomad4 AFR exome

AF:

0.0000304

Gnomad4 AMR exome

AF:

0.0000234

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000259

Gnomad4 SAS exome

AF:

0.0000831

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000633

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152012

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74260

show subpopulations

Gnomad4 AFR

AF:

0.0000484

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000113

ExAC

AF:

0.00000824

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 31, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.59A>G (p.N20S) alteration is located in exon 2 (coding exon 2) of the SLC9A8 gene. This alteration results from a A to G substitution at nucleotide position 59, causing the asparagine (N) at amino acid position 20 to be replaced by a serine (S). 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

0.074

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.40

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.062

.;T

Eigen

Uncertain

0.46

Eigen_PC

Uncertain

0.54

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.95

D;D

M_CAP

Benign

0.026

MetaRNN

Uncertain

0.58

D;D

MetaSVM

Benign

-0.77

MutationAssessor

Benign

0.69

N;N

PrimateAI

Uncertain

0.51

PROVEAN

Benign

-0.55

N;N

REVEL

Benign

0.19

Sift

Uncertain

0.028

D;D

Sift4G

Benign

0.27

T;T

Polyphen

1.0

D;P

Vest4

0.53

MutPred

0.30

Gain of glycosylation at N20 (P = 0.0376);Gain of glycosylation at N20 (P = 0.0376);

MVP

0.86

MPC

1.0

ClinPred

0.44

GERP RS

5.7

Varity_R

0.075

gMVP

0.39

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over