Genetic Variant SLC9A9:p.Ile589Leu (chr3-143266875-T-G) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_173653.4(SLC9A9):c.1765A>C(p.Ile589Leu) 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 1,461,880 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign 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. I589T) 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: 0.754

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:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.048230946).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
SLC9A9	NM_173653.4 link	c.1765A>C	p.Ile589Leu	missense_variant	Exon 16 of 16	ENST00000316549.11	NP_775924.1
SLC9A9	XM_017006203.2 link	c.1414A>C	p.Ile472Leu	missense_variant	Exon 15 of 15		XP_016861692.1
SLC9A9	XM_011512703.4 link	c.1117A>C	p.Ile373Leu	missense_variant	Exon 13 of 13		XP_011511005.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC9A9	ENST00000316549.11 link	c.1765A>C	p.Ile589Leu	missense_variant	Exon 16 of 16	1	NM_173653.4	ENSP00000320246.6

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461880

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727234

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:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1112000

Other (OTH)

AF:

0.00

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.069

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.64

CADD

Benign

(source)

DANN

Benign

0.31

DEOGEN2

Benign

0.011

Eigen

Benign

-0.70

Eigen_PC

Benign

-0.46

FATHMM_MKL

Benign

0.72

LIST_S2

Benign

0.36

M_CAP

Benign

0.0039

MetaRNN

Benign

0.048

MetaSVM

Benign

-0.96

MutationAssessor

Benign

-1.1

PhyloP100

0.75

PrimateAI

Benign

0.38

PROVEAN

Benign

0.68

REVEL

Benign

0.060

Sift

Benign

1.0

Sift4G

Benign

1.0

Polyphen

0.0

Vest4

0.088

MutPred

0.22

Gain of glycosylation at Y591 (P = 0.0225);

MVP

0.24

MPC

0.041

ClinPred

0.060

GERP RS

4.5

Varity_R

0.062

gMVP

0.17

Mutation Taster

=98/2

polymorphism

(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

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over