3-24143502-A-G

Position:

• chr3-24143502-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP2 PP3

The NM_001354712.2(THRB):​c.737T>C​(p.Leu246Pro) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: THRB NM_001354712.2 missense, splice_region
• Scores: Splicing: ADA: 0.8544
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 9.32

Genes affected

THRB (HGNC:11799): (thyroid hormone receptor beta) The protein encoded by this gene is a nuclear hormone receptor for triiodothyronine. It is one of the several receptors for thyroid hormone, and has been shown to mediate the biological activities of thyroid hormone. Knockout studies in mice suggest that the different receptors, while having certain extent of redundancy, may mediate different functions of thyroid hormone. Mutations in this gene are known to be a cause of generalized thyroid hormone resistance (GTHR), a syndrome characterized by goiter and high levels of circulating thyroid hormone (T3-T4), with normal or slightly elevated thyroid stimulating hormone (TSH). Several alternatively spliced transcript variants encoding the same protein have been observed for this gene. [provided by RefSeq, Jul 2008]

(HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), THRB. . Gene score misZ 2.5652 (greater than the threshold 3.09). Trascript score misZ 3.708 (greater than threshold 3.09). GenCC has associacion of gene with thyroid hormone resistance, generalized, autosomal dominant, resistance to thyroid hormone due to a mutation in thyroid hormone receptor beta, thyroid hormone resistance, generalized, autosomal recessive.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.82

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
THRB	NM_001354712.2	c.737T>C	p.Leu246Pro	missense_variant, splice_region_variant	8/11	ENST00000646209.2	NP_001341641.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
THRB	ENST00000646209.2	c.737T>C	p.Leu246Pro	missense_variant, splice_region_variant	8/11		NM_001354712.2	ENSP00000496686
	ENST00000702841.1	n.83+5554A>G		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Quest Diagnostics Nichols Institute San Juan Capistrano

Aug 15, 2023

The has not been reported in large, multi-ethnic general populations (http://gnomad.broadinstitute.org). Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded predictions that this variant is damaging. To the best of our knowledge, the variant has not been reported in the published literature. Based on the available information, we are unable to determine the clinical significance of the variant. -

Thyroid hormone resistance, generalized, autosomal dominant Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Clinical Molecular Genetics Laboratory, Johns Hopkins All Children's Hospital

Jul 13, 2017

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.76
BayesDel_addAF	Pathogenic	0.48	D
BayesDel_noAF	Pathogenic	0.45
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.56	D;D;D;D;D;D;D;D;D;D;.
Eigen	Pathogenic	0.76
Eigen_PC	Pathogenic	0.69
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.93	.;.;.;.;.;.;.;.;.;D;D
M_CAP	Pathogenic	0.67	D
MetaRNN	Pathogenic	0.82	D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Benign	2.0	M;M;M;M;M;M;M;M;M;M;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.84	D
PROVEAN	Uncertain	-2.5	D;D;.;.;.;.;.;.;D;.;N
REVEL	Pathogenic	0.79
Sift	Benign	0.032	D;D;.;.;.;.;.;.;D;.;D
Sift4G	Uncertain	0.043	D;D;.;.;.;.;.;.;D;.;D
Polyphen		1.0	D;D;D;D;D;D;D;D;D;D;.
Vest4		0.87
MutPred		0.56		Gain of disorder (P = 0.0059);Gain of disorder (P = 0.0059);Gain of disorder (P = 0.0059);Gain of disorder (P = 0.0059);Gain of disorder (P = 0.0059);Gain of disorder (P = 0.0059);Gain of disorder (P = 0.0059);Gain of disorder (P = 0.0059);Gain of disorder (P = 0.0059);Gain of disorder (P = 0.0059);.;
MVP		0.91
MPC		1.8
ClinPred		0.91	D
GERP RS		6.0
Varity_R		0.90
gMVP		0.97

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.85
dbscSNV1_RF	Pathogenic	0.73
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: rs1553616482; hg19: chr3-24184993;