chrX-74421662-G-A

Position:

• chrX-74421662-G-A

Variant summary

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

The NM_006517.5(SLC16A2):​c.25G>A​(p.Glu9Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000184 in 1,089,400 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. 11/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 0.0000018 (0 hom. 2 hem.)
• Consequence: SLC16A2 NM_006517.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.33

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]

ACMG classification

Verdict is Likely_benign. Variant got -6 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.07048187).
• BS2: High Hemizygotes in GnomAdExome4 at 2 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SLC16A2	NM_006517.5	c.25G>A	p.Glu9Lys	missense_variant	1/6	ENST00000587091.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC16A2	ENST00000587091.6	c.25G>A	p.Glu9Lys	missense_variant	1/6	1	NM_006517.5	P1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome AF: 0.00000184 AC: 2 AN: 1089400 Hom.: 0 Cov.: 31 AF XY: 0.00000559 AC XY: 2 AN XY: 357678

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 0.0000436

GnomAD4 genome Cov.: 23

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Allan-Herndon-Dudley syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genomic Research Center, Shahid Beheshti University of Medical Sciences

Apr 27, 2019

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.065
BayesDel_addAF	Benign	-0.22	T
BayesDel_noAF	Benign	-0.55
CADD	Benign	18
DANN	Uncertain	0.99
DEOGEN2	Benign	0.15	T
FATHMM_MKL	Benign	0.32	N
LIST_S2	Benign	0.57	T
M_CAP	Benign	0.065	D
MetaRNN	Benign	0.070	T
MetaSVM	Benign	-0.89	T
MutationAssessor	Benign	0.90	L
MutationTaster	Benign	1.0	N;N
PrimateAI	Uncertain	0.53	T
Sift4G	Benign	0.12	T
Polyphen		0.0	B
Vest4		0.13
MutPred		0.29		Gain of MoRF binding (P = 2e-04);
MVP		0.13
MPC		0.98
ClinPred		0.36	T
GERP RS		1.1
Varity_R		0.058
gMVP		0.25

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: rs933036653; hg19: chrX-73641497;