chrX-46607097-G-A

Position:

• chrX-46607097-G-A

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_Moderate BS2

The NM_001257291.2(SLC9A7):​c.2036C>T​(p.Ser679Leu) variant causes a missense change. The variant allele was found at a frequency of 0.00000364 in 1,098,009 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 2 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 22)
  • Exomes 𝑓: 0.0000036 (0 hom. 2 hem.)
• Consequence: SLC9A7 NM_001257291.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.68

Genes affected

SLC9A7 (HGNC:17123): (solute carrier family 9 member A7) This gene encodes a sodium and potassium/ proton antiporter that is a member of the solute carrier family 9 protein family. The encoded protein is primarily localized to the trans-Golgi network and is involved in maintaining pH homeostasis in organelles along the secretory and endocytic pathways. This protein may enhance cell growth of certain breast tumors. This gene is part of a gene cluster on chromosome Xp11.23. A pseudogene of this gene is found on chromosome 12. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Mar 2012]

SLC9A7 (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -6 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.19426).
• BS2: High Hemizygotes in GnomAdExome4 at 2 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SLC9A7	NM_001257291.2	c.2036C>T	p.Ser679Leu	missense_variant	17/17	ENST00000616978.5	NP_001244220.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SLC9A7	ENST00000616978.5	c.2036C>T	p.Ser679Leu	missense_variant	17/17	1	NM_001257291.2	ENSP00000480916.1

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome AF: 0.00000364 AC: 4 AN: 1098009 Hom.: 0 Cov.: 32 AF XY: 0.00000550 AC XY: 2 AN XY: 363367

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000284

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000356

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 22

Alfa AF: 0.0000540 Hom.: 0

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 02, 2022

This variant is present in population databases (no rsID available, gnomAD 0.01%). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Not Available"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals affected with SLC9A7-related conditions. This sequence change replaces serine, which is neutral and polar, with leucine, which is neutral and non-polar, at codon 679 of the SLC9A7 protein (p.Ser679Leu). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.098
BayesDel_addAF	Benign	-0.28	T
BayesDel_noAF	Benign	-0.64
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.030	T;T
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Uncertain	0.88	D;D
M_CAP	Uncertain	0.22	D
MetaRNN	Benign	0.19	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.7	.;L
PrimateAI	Benign	0.47	T
PROVEAN	Benign	-1.8	.;N
REVEL	Benign	0.032
Sift	Benign	0.066	.;T
Sift4G	Benign	0.31	T;T
Polyphen		0.33	.;B
Vest4		0.21
MutPred		0.13		.;Loss of phosphorylation at S678 (P = 0.0093);
MVP		0.13
MPC		0.56
ClinPred		0.48	T
GERP RS		5.1
Varity_R		0.22
gMVP		0.41

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

Other links and lift over

dbSNP: rs1392839922; hg19: chrX-46466532; COSMIC: COSV60379100;