6-77463384-T-G

Position:

• chr6-77463384-T-G

Variant summary

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

The NM_000863.3(HTR1B):​c.20A>C​(p.Gln7Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/21 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: HTR1B NM_000863.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -1.24

Genes affected

HTR1B (HGNC:5287): (5-hydroxytryptamine receptor 1B) The protein encoded by this intronless gene is a G-protein coupled receptor for serotonin (5-hydroxytryptamine). Ligand binding activates second messengers that inhibit the activity of adenylate cyclase and manage the release of serotonin, dopamine, and acetylcholine in the brain. The encoded protein may be involved in several neuropsychiatric disorders and therefore is often a target of antidepressant and other psychotherapeutic drugs. [provided by RefSeq, Nov 2015]

LOC105377864 (HGNC:):

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=0.090228826).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HTR1B	NM_000863.3	c.20A>C	p.Gln7Pro	missense_variant	1/1	ENST00000369947.5
LOC105377864	XM_047419660.1	c.-3742-11142T>G		intron_variant
LOC105377864	XM_047419659.1	c.-11075T>G		5_prime_UTR_variant	2/6
LOC105377864	XM_047419661.1	c.-3917+266T>G		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HTR1B	ENST00000369947.5	c.20A>C	p.Gln7Pro	missense_variant	1/1		NM_000863.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 24, 2023

The c.20A>C (p.Q7P) alteration is located in exon 1 (coding exon 1) of the HTR1B gene. This alteration results from a A to C substitution at nucleotide position 20, causing the glutamine (Q) at amino acid position 7 to be replaced by a proline (P). 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	0.050
BayesDel_addAF	Benign	-0.22	T
BayesDel_noAF	Benign	-0.56
CADD	Benign	0.11
DANN	Benign	0.74
DEOGEN2	Benign	0.083	T
Eigen	Benign	-1.7
Eigen_PC	Benign	-1.8
FATHMM_MKL	Benign	0.035	N
LIST_S2	Benign	0.52	T
M_CAP	Benign	0.0047	T
MetaRNN	Benign	0.090	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.0	N
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.36	T
PROVEAN	Benign	-0.15	N
REVEL	Benign	0.070
Sift	Benign	0.15	T
Sift4G	Benign	0.30	T
Polyphen		0.0	B
Vest4		0.17
MutPred		0.17		Gain of glycosylation at Q7 (P = 0.0158);
MVP		0.48
MPC		0.78
ClinPred		0.048	T
GERP RS		-9.6
Varity_R		0.10
gMVP		0.62

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: chr6-78173101;