X-74421734-T-A

Variant names:

• chrX-74421734-T-A
• rs6647476
• NM_006517.5:c.97T>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_006517.5(SLC16A2):​c.97T>A​(p.Ser33Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/18 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. S33P) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 0.0 (0 hom. 0 hem.)
  • Failed GnomAD Quality Control
• Consequence: SLC16A2 NM_006517.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.611
• Publications: 40 publications found

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 Gene-Disease associations (from GenCC):

• Allan-Herndon-Dudley syndrome

  Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, G2P, PanelApp Australia, Orphanet, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.08101407).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006517.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC16A2	NM_006517.5	MANE Select	c.97T>A	p.Ser33Thr	missense	Exon 1 of 6	NP_006508.2	P36021

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC16A2	ENST00000587091.6	TSL:1 MANE Select	c.97T>A	p.Ser33Thr	missense	Exon 1 of 6	ENSP00000465734.1	P36021
	SLC16A2	ENST00000878592.1		c.97T>A	p.Ser33Thr	missense	Exon 1 of 7	ENSP00000548651.1
	SLC16A2	ENST00000922847.1		c.97T>A	p.Ser33Thr	missense	Exon 1 of 7	ENSP00000592906.1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1053331 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 339563

African (AFR) AF: 0.00 AC: 0 AN: 25478

American (AMR) AF: 0.00 AC: 0 AN: 29390

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 18715

East Asian (EAS) AF: 0.00 AC: 0 AN: 28315

South Asian (SAS) AF: 0.00 AC: 0 AN: 50709

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 31954

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3164

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 821041

Other (OTH) AF: 0.00 AC: 0 AN: 44565

GnomAD4 genome Cov.: 23

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.062
BayesDel_addAF	Benign	-0.29	T
BayesDel_noAF	Benign	-0.66
CADD	Benign	2.5
DANN	Benign	0.83
DEOGEN2	Benign	0.13	T
FATHMM_MKL	Benign	0.10	N
LIST_S2	Benign	0.78	T
M_CAP	Benign	0.0060	T
MetaRNN	Benign	0.081	T
MetaSVM	Benign	-0.92	T
MutationAssessor	Benign	0.0	N
PhyloP100		-0.61
PrimateAI	Uncertain	0.53	T
Sift4G	Benign	0.062	T
Polyphen		0.78	P
Vest4		0.12
MutPred		0.31		Loss of glycosylation at S33 (P = 0.0856)
MVP		0.31
MPC		0.80
ClinPred		0.13	T
PromoterAI		0.024	Neutral
Varity_R		0.19
gMVP		0.095
Mutation Taster		=85/15	polymorphism

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

Other links and lift over

dbSNP: rs6647476; hg19: chrX-73641569;