X-114726930-A-T

Position:

• chrX-114726930-A-T

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP6

The NM_000868.4(HTR2C):​c.-7A>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000197 in 1,016,253 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (no stars).

• Frequency:
  • Genomes: not found (cov: 24)
  • Exomes 𝑓: 0.0000020 (0 hom. 0 hem.)
• Consequence: HTR2C NM_000868.4 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Likely benign no assertion criteria provided B:1
• Conservation: PhyloP100: 2.56

Genes affected

HTR2C (HGNC:5295): (5-hydroxytryptamine receptor 2C) This gene encodes a seven-transmembrane G-protein-coupled receptor. The encoded protein responds to signaling through the neurotransmitter serotonin. The mRNA of this gene is subject to multiple RNA editing events, where adenosine residues encoded by the genome are converted to inosines. RNA editing is predicted to alter the structure of the second intracellular loop, thereby generating alternate protein forms with decreased ability to interact with G proteins. Abnormalities in RNA editing of this gene have been detected in victims of suicide that suffer from depression. In addition, naturally-occuring variation in the promoter and 5' non-coding and coding regions of this gene may show statistically-significant association with mental illness and behavioral disorders. Alternative splicing results in multiple different transcript variants. [provided by RefSeq, Jan 2015]

LOC105373313 (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.34).
• BP6: Variant X-114726930-A-T is Benign according to our data. Variant chrX-114726930-A-T is described in ClinVar as [Likely_benign]. Clinvar id is 3030979.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HTR2C	NM_000868.4	c.-7A>T		5_prime_UTR_premature_start_codon_gain_variant	3/6	ENST00000276198.6	NP_000859.2
HTR2C	NM_000868.4	c.-7A>T		5_prime_UTR_variant	3/6	ENST00000276198.6	NP_000859.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HTR2C	ENST00000276198	c.-7A>T		5_prime_UTR_premature_start_codon_gain_variant	3/6	1	NM_000868.4	ENSP00000276198.1
HTR2C	ENST00000276198	c.-7A>T		5_prime_UTR_variant	3/6	1	NM_000868.4	ENSP00000276198.1

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome AF: 0.00000197 AC: 2 AN: 1016253 Hom.: 0 Cov.: 20 AF XY: 0.00 AC XY: 0 AN XY: 312895

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: 0.00000126

Gnomad4 OTH exome AF: 0.0000233

GnomAD4 genome Cov.: 24

Bravo AF: 0.0000189

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: no assertion criteria provided

Submissions by phenotype

HTR2C-related disorder Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jul 06, 2023

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.34
CADD	Benign	17
DANN	Benign	0.91

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs1232972236; hg19: chrX-113961339;