8-109088189-A-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_003301.7(TRHR):c.677A>C(p.Asp226Ala) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: TRHR NM_003301.7 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.82

Genes affected

TRHR (HGNC:12299): (thyrotropin releasing hormone receptor) This gene encodes a G protein-coupled receptor for thyrotropin-releasing hormone (TRH). Upon binding to TRH, this receptor activates the inositol phospholipid-calcium-protein kinase C transduction pathway. Mutations in this gene have been associated with generalized thyrotropin-releasing hormone resistance. [provided by RefSeq, Sep 2011]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.24197468).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TRHR	NM_003301.7	c.677A>C	p.Asp226Ala	missense_variant	2/3	ENST00000518632.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TRHR	ENST00000518632.2	c.677A>C	p.Asp226Ala	missense_variant	2/3	5	NM_003301.7	P1
TRHR	ENST00000311762.2	c.677A>C	p.Asp226Ala	missense_variant	1/2	1		P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 27, 2021

The c.677A>C (p.D226A) alteration is located in exon 1 (coding exon 1) of the TRHR gene. This alteration results from a A to C substitution at nucleotide position 677, causing the aspartic acid (D) at amino acid position 226 to be replaced by an alanine (A). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.027	T
BayesDel_noAF	Benign	-0.28
Cadd	Benign	20
Dann	Uncertain	0.97
DEOGEN2	Benign	0.38	T;T
Eigen	Benign	-0.14
Eigen_PC	Benign	0.035
FATHMM_MKL	Pathogenic	0.99	D
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.24	T;T
MetaSVM	Benign	-0.82	T
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.66	T
PROVEAN	Benign	-1.9	N;N
REVEL	Benign	0.18
Sift	Benign	0.18	T;T
Sift4G	Benign	0.85	T;T
Polyphen		0.026	B;B
Vest4		0.14
MutPred		0.53		Gain of methylation at K228 (P = 0.0565);Gain of methylation at K228 (P = 0.0565);
MVP		0.86
MPC		0.28
ClinPred		0.93	D
GERP RS		4.7
Varity_R		0.18
gMVP		0.65

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr8-110100418;