Genetic Variant NM_173653.4:c.1267C>G (chr3-143493701-G-C) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_173653.4(SLC9A9):c.1267C>G(p.Arg423Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,796 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. R423Q) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

SLC9A9
NM_173653.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.07

Publications

0 publications found

Variant links:

Genes affected

SLC9A9 (HGNC:20653): (solute carrier family 9 member A9) This gene encodes a sodium/proton exchanger that is a member of the solute carrier 9 protein family. The encoded protein localizes the to the late recycling endosomes and may play an important role in maintaining cation homeostasis. Mutations in this gene are associated with autism susceptibility 16 and attention-deficit/hyperactivity disorder. [provided by RefSeq, Mar 2012]

SLC9A9 Gene-Disease associations (from GenCC):

autism, susceptibility to, 16
Inheritance: AD Classification: LIMITED Submitted by: G2P
autism spectrum disorder
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

SLC9A9 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.89

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC9A9	NM_173653.4 link	c.1267C>G	p.Arg423Gly	missense_variant	Exon 11 of 16	ENST00000316549.11	NP_775924.1	Q8IVB4
SLC9A9	XM_017006202.3 link	c.1267C>G	p.Arg423Gly	missense_variant	Exon 11 of 15		XP_016861691.1
SLC9A9	XM_017006203.2 link	c.916C>G	p.Arg306Gly	missense_variant	Exon 10 of 15		XP_016861692.1
SLC9A9	XM_011512703.4 link	c.619C>G	p.Arg207Gly	missense_variant	Exon 8 of 13		XP_011511005.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC9A9	ENST00000316549.11 link	c.1267C>G	p.Arg423Gly	missense_variant	Exon 11 of 16	1	NM_173653.4	ENSP00000320246.6		Q8IVB4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461796

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727196

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39684

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111946

Other (OTH)

AF:

0.00

AC:

AN:

60390

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

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

0.90

BayesDel_addAF

Pathogenic

0.31

BayesDel_noAF

Pathogenic

0.20

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.21

Eigen

Uncertain

0.67

Eigen_PC

Uncertain

0.59

FATHMM_MKL

Uncertain

0.94

LIST_S2

Pathogenic

0.99

M_CAP

Uncertain

0.15

MetaRNN

Pathogenic

0.89

MetaSVM

Uncertain

-0.020

MutationAssessor

Uncertain

2.7

PhyloP100

3.1

PrimateAI

Uncertain

0.76

PROVEAN

Pathogenic

-6.8

REVEL

Uncertain

0.64

Sift

Uncertain

0.0010

Sift4G

Pathogenic

0.0010

Polyphen

1.0

Vest4

0.94

MutPred

0.66

Gain of catalytic residue at Q425 (P = 0.0097);

MVP

0.89

MPC

0.32

ClinPred

0.99

GERP RS

4.5

Varity_R

0.76

gMVP

0.84

Mutation Taster

=45/55

disease causing

(source)

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