NM_006517.5:c.629C>A

Variant names:

• chrX-74524412-C-A
• rs746493490
• NM_006517.5:c.629C>A

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PM1 PM2 PP3_Strong PP5_Moderate

The NM_006517.5(SLC16A2):​c.629C>A​(p.Ser210Tyr) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S210F) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 23)
• Consequence: SLC16A2 NM_006517.5 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 4.67
• Publications: 0 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: Orphanet, G2P, ClinGen, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 2 benign, 5 uncertain in NM_006517.5
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.981
• PP5: Variant X-74524412-C-A is Pathogenic according to our data. Variant chrX-74524412-C-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 3062067.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC16A2	NM_006517.5	c.629C>A	p.Ser210Tyr	missense_variant	Exon 3 of 6	ENST00000587091.6	NP_006508.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC16A2	ENST00000587091.6	c.629C>A	p.Ser210Tyr	missense_variant	Exon 3 of 6	1	NM_006517.5	ENSP00000465734.1
SLC16A2	ENST00000590447.1	c.68C>A	p.Ser23Tyr	missense_variant	Exon 2 of 4	5		ENSP00000466213.1
SLC16A2	ENST00000636771.1	n.*330C>A		non_coding_transcript_exon_variant	Exon 4 of 7	5		ENSP00000490445.1
SLC16A2	ENST00000636771.1	n.*330C>A		3_prime_UTR_variant	Exon 4 of 7	5		ENSP00000490445.1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 23

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Allan-Herndon-Dudley syndrome Pathogenic:1

Mar 26, 2018

Illumina Laboratory Services, Illumina

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The SLC16A2 c.629C>A p.(Ser210Tyr) missense variant has been identified in an individual with a phenotype consistent with Allan-Herndon-Dudley syndrome (Dye et al. 2020). This variant is not observed in version 2.1.1 of the Genome Aggregation Database. The variant is located in the helical transmembrane domain. Based on the available evidence the c.629C>A p.(Ser210Tyr) variant is classified as likely pathogenic for Allan-Herndon-Dudley syndrome. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.37	D
BayesDel_noAF	Pathogenic	0.30
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.91	D
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Pathogenic	0.97	D
M_CAP	Pathogenic	0.79	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Uncertain	-0.11	T
MutationAssessor	Uncertain	2.7	M
PhyloP100		4.7
PrimateAI	Uncertain	0.77	T
Sift4G	Pathogenic	0.0010	D
Polyphen		1.0	D
Vest4		0.94
MutPred		0.77		Loss of helix (P = 0.3949);
MVP		1.0
MPC		2.2
ClinPred		0.98	D
GERP RS		4.9
Varity_R		0.97
gMVP		0.98
Mutation Taster		=43/57	disease causing

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: rs746493490; hg19: chrX-73744247;