X-74421660-G-A

Position:

chrX-74421660-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_006517.5(SLC16A2):c.23G>A(p.Ser8Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000965 in 1,202,475 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 40 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S8R) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000089 ( 0 hom., 1 hem., cov: 23)

Exomes 𝑓: 0.000097 ( 0 hom. 39 hem. )

Consequence

SLC16A2
NM_006517.5 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 0.657

Variant links:

Genes affected

SLC16A2 (HGNC:10923): (solute carrier family 16 member 2) This gene encodes an integral membrane protein that functions as a transporter of thyroid hormone. The encoded protein facilitates the cellular importation of thyroxine (T4), triiodothyronine (T3), reverse triiodothyronine (rT3) and diidothyronine (T2). This gene is expressed in many tissues and likely plays an important role in the development of the central nervous system. Loss of function mutations in this gene are associated with psychomotor retardation in males while females exhibit no neurological defects and more moderate thyroid-deficient phenotypes. This gene is subject to X-chromosome inactivation. Mutations in this gene are the cause of Allan-Herndon-Dudley syndrome. [provided by RefSeq, Mar 2012]

SLC16A2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.00589785).

BP6

Variant X-74421660-G-A is Benign according to our data. Variant chrX-74421660-G-A is described in ClinVar as [Benign]. Clinvar id is 1575047.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.0000887 (10/112769) while in subpopulation AMR AF= 0.000925 (10/10813). AF 95% confidence interval is 0.000501. There are 0 homozygotes in gnomad4. There are 1 alleles in male gnomad4 subpopulation. Median coverage is 23. This position pass quality control queck.

BS2

High Hemizygotes in GnomAdExome4 at 39 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SLC16A2	NM_006517.5 linkuse as main transcript	c.23G>A	p.Ser8Asn	missense_variant	1/6	ENST00000587091.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC16A2	ENST00000587091.6 linkuse as main transcript	c.23G>A	p.Ser8Asn	missense_variant	1/6	1	NM_006517.5	P1

Frequencies

GnomAD3 genomes

AF:

0.0000887

AC:

AN:

112769

Hom.:

Cov.:

AF XY:

0.0000286

AC XY:

AN XY:

34919

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000925

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000552

AC:

AN:

161237

Hom.:

AF XY:

0.000506

AC XY:

AN XY:

53393

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00336

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000242

GnomAD4 exome

AF:

0.0000973

AC:

106

AN:

1089706

Hom.:

Cov.:

AF XY:

0.000109

AC XY:

AN XY:

357872

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00306

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000887

AC:

AN:

112769

Hom.:

Cov.:

AF XY:

0.0000286

AC XY:

AN XY:

34919

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000925

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000169

Hom.:

Bravo

AF:

0.000257

ExAC

AF:

0.000323

AC:

ClinVar

Significance: Benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Spastic paraplegia

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 30, 2024

- -

not specified

Benign:1

Benign, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Jun 24, 2022

Variant summary: SLC16A2 c.23G>A (p.Ser8Asn) results in a conservative amino acid change in the encoded protein sequence. Five of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.0005 in 183091 control chromosomes (gnomAD), predominantly at a frequency of 0.0034 within the Latino subpopulation in the gnomAD database, including 28 hemizygotes. The observed variant frequency within Latino control individuals in the gnomAD database is approximately 3 fold of the estimated maximal expected allele frequency for a pathogenic variant in SLC16A2 causing Allan-Herndon-Dudley Syndrome (0.0011), strongly suggesting that the variant is a benign polymorphism found primarily in populations of Latino origin. To our knowledge, no occurrence of c.23G>A in individuals affected with Allan-Herndon-Dudley Syndrome and no experimental evidence demonstrating its impact on protein function have been reported. One ClinVar submitter has assessed the variant since 2014: the variant was classified as benign. Based on the evidence outlined above, the variant was classified as benign. -

Inborn genetic diseases

Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 14, 2017

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.093

BayesDel_addAF

Benign

-0.63

BayesDel_noAF

Benign

-0.68

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.12

FATHMM_MKL

Benign

0.64

LIST_S2

Benign

0.47

M_CAP

Uncertain

0.088

MetaRNN

Benign

0.0059

MetaSVM

Benign

-0.85

MutationAssessor

Benign

0.90

MutationTaster

Benign

1.0

N;N

PrimateAI

Uncertain

0.55

Sift4G

Benign

0.40

Polyphen

0.079

Vest4

0.15

MutPred

0.095

Loss of phosphorylation at S8 (P = 0.0108);

MVP

0.31

MPC

1.0

ClinPred

0.043

GERP RS

3.0

Varity_R

0.15

gMVP

0.21

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