3-184056953-G-A

Variant names:

• chr3-184056953-G-A
• NM_130770.3:c.468G>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_130770.3(HTR3C):​c.468G>A​(p.Met156Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,418 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 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)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: HTR3C NM_130770.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.0980
• Publications: 0 publications found

Genes affected

HTR3C (HGNC:24003): (5-hydroxytryptamine receptor 3C) The product of this gene belongs to the ligand-gated ion channel receptor superfamily. This gene encodes subunit C of the type 3 receptor for 5-hydroxytryptamine (serotonin), a biogenic hormone that functions as a neurotransmitter, a hormone, and a mitogen. This receptor causes fast, depolarizing responses in neurons after activation. Genes encoding subunits C, D and E form a cluster on chromosome 3. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1319328).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_130770.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HTR3C	NM_130770.3	MANE Select	c.468G>A	p.Met156Ile	missense	Exon 5 of 9	NP_570126.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HTR3C	ENST00000318351.2	TSL:1 MANE Select	c.468G>A	p.Met156Ile	missense	Exon 5 of 9	ENSP00000322617.1	Q8WXA8

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461418 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 727044

African (AFR) AF: 0.00 AC: 0 AN: 33472

American (AMR) AF: 0.00 AC: 0 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26118

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86224

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53402

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 9.00e-7 AC: 1 AN: 1111646

Other (OTH) AF: 0.00 AC: 0 AN: 60376

GnomAD4 genome Cov.: 32

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.21
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.42
CADD	Benign	15
DANN	Benign	0.92
DEOGEN2	Benign	0.019	T
Eigen	Benign	-0.67
Eigen_PC	Benign	-0.67
FATHMM_MKL	Benign	0.071	N
LIST_S2	Benign	0.77	T
M_CAP	Benign	0.017	T
MetaRNN	Benign	0.13	T
MetaSVM	Benign	-0.76	T
MutationAssessor	Benign	1.3	L
PhyloP100		0.098
PrimateAI	Benign	0.23	T
PROVEAN	Benign	-1.4	N
REVEL	Benign	0.19
Sift	Benign	0.45	T
Sift4G	Benign	0.52	T
Polyphen		0.055	B
Vest4		0.080
MutPred		0.52		Loss of disorder (P = 0.1252)
MVP		0.46
MPC		0.048
ClinPred		0.16	T
GERP RS		2.1
Varity_R		0.15
gMVP		0.10
Mutation Taster		=99/1	polymorphism

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

hg19: chr3-183774741; COSMIC: COSV100570650;