chr1-115034015-C-T

Variant names:

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PVS1_StrongPM2PP5_Very_Strong

The NM_000549.5(TSHB):c.205C>T(p.Gln69*) variant causes a stop gained change. The variant allele was found at a frequency of 0.0000273 in 1,613,582 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000027 ( 0 hom. )

Consequence

TSHB
NM_000549.5 stop_gained

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:6

Conservation

PhyloP100: 5.86

Variant links:

Genes affected

TSHB (HGNC:12372): (thyroid stimulating hormone subunit beta) The four human glycoprotein hormones chorionic gonadotropin (CG), luteinizing hormone (LH), follicle stimulating hormone (FSH), and thyroid stimulating hormone (TSH) are dimers consisting of alpha and beta subunits that are associated noncovalently. The alpha subunits of these hormones are identical, however, their beta chains are unique and confer biological specificity. Thyroid stimulating hormone functions in the control of thyroid structure and metabolism. The protein encoded by this gene is the beta subunit of thyroid stimulating hormone. Mutations in this gene are associated with congenital central and secondary hypothyroidism and Hashimoto's thyroiditis. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, May 2013]

TSHB links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 14 ACMG points.

PVS1

Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.508 CDS is truncated, and there are 3 pathogenic variants in the truncated region.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 1-115034015-C-T is Pathogenic according to our data. Variant chr1-115034015-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 12687.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TSHB	NM_000549.5 link	c.205C>T	p.Gln69*	stop_gained	Exon 3 of 3	ENST00000256592.3	NP_000540.2	P01222-1
TSHB	NM_001277991.1 link	c.70C>T	p.Gln24*	stop_gained	Exon 1 of 1		NP_001264920.1	P01222-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TSHB	ENST00000256592.3 link	c.205C>T	p.Gln69*	stop_gained	Exon 3 of 3	5	NM_000549.5	ENSP00000256592.1		P01222-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152094

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000159

AC:

AN:

251322

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135824

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

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:

0.0000352

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000274

AC:

AN:

1461488

Hom.:

Cov.:

AF XY:

0.0000275

AC XY:

AN XY:

727052

show subpopulations

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:

0.0000351

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152094

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74282

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000319

Hom.:

Bravo

AF:

0.0000189

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Isolated thyroid-stimulating hormone deficiency

Pathogenic:4

May 22, 2022

3billion

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The variant is observed at an extremely low frequency in the gnomAD v2.1.1 dataset (total allele frequency: 0.002%). Stop-gained (nonsense): predicted to result in a loss or disruption of normal protein function through protein truncation. Multiple pathogenic variants are reported in the predicted truncated region. The variant has been reported to co-segregate with the disease in at least one similarly affected relative/individual in the same family or similarly affected unrelated family (PMID:11549695). The variant has been reported at least twice as pathogenic without evidence for the classification (ClinVar ID: VCV000012687 / PMID: 11297590). Therefore, this variant is classified as pathogenic according to the recommendation of ACMG/AMP guideline. -

Sep 01, 2001

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Jan 12, 2019

Illumina Laboratory Services, Illumina

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The TSHB c.205C>T (p.Gln69Ter) variant is a stop-gained variant predicted to result in premature termination of the protein. The p.Gln69Ter variant is described in two studies in which it is detected in a homozygous state in three individuals from two families with congenital hypothyroidism, two of whom are related (Bonomi et al. 2001; Vuissoz et al. 2001). The variant was also detected in a heterozygous state in both sets of parents and three unaffected siblings. Control data are unavailable for the p.Gln69Ter variant which is reported at a frequency of 0.000039 in the European (non-Finnish) population of the Genome Aggregation Database. Serum-TSH was extremely low in the affected homozygotes and stimulation with TRH failed to induce a TSH release. The p.Gln69Ter variant is predicted to result in a peptide lacking at least 50% of the C-terminal region of the protein. The truncated peptide does not contain the seat belt region of the protein, a region critical for the dimerization with the alpha-subunit and hence for the correct secretion of the mature TSH heterodimer. Based on the evidence, the p.Gln69Ter variant is classified as likely pathogenic for congenital hypothyroidism. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population. -

Dec 24, 2021

Revvity Omics, Revvity

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

TSHB-related disorder

Pathogenic:1

Apr 28, 2023

PreventionGenetics, part of Exact Sciences

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The TSHB c.205C>T variant is predicted to result in premature protein termination (p.Gln69*). This variant has been reported in the homozygous and compound heterozygous states in individuals with hypothyroidism (Bonomi et al. 2001. PubMed ID: 11297590; reported as Q49X in Karges et al. 2004. PubMed ID: 15297803). This variant is reported in 0.0039% of alleles in individuals of European (Non-Finnish) descent in gnomAD (http://gnomad.broadinstitute.org/variant/1-115576636-C-T). Nonsense variants in TSHB are expected to be pathogenic, and this variant has been classified as pathogenic or likely pathogenic by multiple independent submitters to the ClinVar database (https://www.ncbi.nlm.nih.gov/clinvar/variation/12687/). Given the evidence, we interpret this variant as pathogenic. -

not provided

Pathogenic:1

Dec 13, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Gln69*) in the TSHB gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 70 amino acid(s) of the TSHB protein. This variant is present in population databases (rs121918670, gnomAD 0.004%). This premature translational stop signal has been observed in individuals with congenital hypothyroidism (PMID: 11297590, 11549695, 15297803). It has also been observed to segregate with disease in related individuals. This variant is also known as p.Q49X. ClinVar contains an entry for this variant (Variation ID: 12687). This variant disrupts a region of the TSHB protein in which other variant(s) (p.Cys125Valfs*10) have been determined to be pathogenic (PMID: 8636437, 15297803, 22606512, 27362444, 31166470). This suggests that this is a clinically significant region of the protein, and that variants that disrupt it are likely to be disease-causing. For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.54

BayesDel_noAF

Pathogenic

0.65

CADD

Pathogenic

DANN

Uncertain

1.0

Eigen

Pathogenic

1.2

Eigen_PC

Pathogenic

1.0

FATHMM_MKL

Pathogenic

0.99

Vest4

0.91

GERP RS

5.8

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.10

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