2-231109341-C-A

Position:

chr2-231109341-C-A

Variant summary

Our verdict is Benign. Variant got -18 ACMG points: 2P and 20B. PM1BP4_StrongBP6_Very_StrongBS1BS2

The NM_000867.5(HTR2B):c.622G>T(p.Val208Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00127 in 1,614,008 control chromosomes in the GnomAD database, including 26 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0070 ( 18 hom., cov: 32)

Exomes 𝑓: 0.00067 ( 8 hom. )

Consequence

HTR2B
NM_000867.5 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: 0.883

Variant links:

Genes affected

HTR2B (HGNC:5294): (5-hydroxytryptamine receptor 2B) This gene encodes one of the several different receptors for 5-hydroxytryptamine (serotonin) that belongs to the G-protein coupled receptor 1 family. Serotonin is a biogenic hormone that functions as a neurotransmitter, a hormone, and a mitogen. Serotonin receptors mediate many of the central and peripheral physiologic functions of serotonin, including regulation of cardiovascular functions and impulsive behavior. Population and family-based analyses of a minor allele (glutamine-to-stop substitution, designated Q20*) which blocks expression of this protein, and knockout studies in mice, suggest a role for this gene in impulsivity. However, other factors, such as elevated testosterone levels, may also be involved. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Mar 2016]

HTR2B links:

PSMD1 (HGNC:9554): (proteasome 26S subunit, non-ATPase 1) The 26S proteasome is a multicatalytic proteinase complex with a highly ordered structure composed of 2 complexes, a 20S core and a 19S regulator. The 20S core is composed of 4 rings of 28 non-identical subunits; 2 rings are composed of 7 alpha subunits and 2 rings are composed of 7 beta subunits. The 19S regulator is composed of a base, which contains 6 ATPase subunits and 2 non-ATPase subunits, and a lid, which contains up to 10 non-ATPase subunits. Proteasomes are distributed throughout eukaryotic cells at a high concentration and cleave peptides in an ATP/ubiquitin-dependent process in a non-lysosomal pathway. An essential function of a modified proteasome, the immunoproteasome, is the processing of class I MHC peptides. This gene encodes the largest non-ATPase subunit of the 19S regulator lid, which is responsible for substrate recognition and binding. There is evidence that this proteasome and its subunits interact with viral proteins, including those of coronaviruses. Alternatively spliced transcript variants have been found for this gene.[provided by RefSeq, Aug 2020]

PSMD1 links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -18 ACMG points.

PM1

In a mutagenesis_site No effect on agonist binding. (size 0) in uniprot entity 5HT2B_HUMAN

BP4

Computational evidence support a benign effect (MetaRNN=0.009016991).

BP6

Variant 2-231109341-C-A is Benign according to our data. Variant chr2-231109341-C-A is described in ClinVar as [Benign]. Clinvar id is 709655.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00695 (1059/152312) while in subpopulation AFR AF= 0.0246 (1021/41558). AF 95% confidence interval is 0.0233. There are 18 homozygotes in gnomad4. There are 505 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 18 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HTR2B	NM_000867.5 linkuse as main transcript	c.622G>T	p.Val208Leu	missense_variant	4/4	ENST00000258400.4	NP_000858.3
PSMD1	NM_002807.4 linkuse as main transcript	c.1883+22160C>A		intron_variant		ENST00000308696.11	NP_002798.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HTR2B	ENST00000258400.4 linkuse as main transcript	c.622G>T	p.Val208Leu	missense_variant	4/4	1	NM_000867.5	ENSP00000258400	P1
PSMD1	ENST00000308696.11 linkuse as main transcript	c.1883+22160C>A		intron_variant		1	NM_002807.4	ENSP00000309474	P1	Q99460-1

Frequencies

GnomAD3 genomes

AF:

0.00694

AC:

1056

AN:

152194

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0245

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00222

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00191

GnomAD3 exomes

AF:

0.00174

AC:

436

AN:

251000

Hom.:

AF XY:

0.00127

AC XY:

172

AN XY:

135648

show subpopulations

Gnomad AFR exome

AF:

0.0249

Gnomad AMR exome

AF:

0.000666

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.000981

GnomAD4 exome

AF:

0.000674

AC:

985

AN:

1461696

Hom.:

Cov.:

AF XY:

0.000564

AC XY:

410

AN XY:

727150

show subpopulations

Gnomad4 AFR exome

AF:

0.0257

Gnomad4 AMR exome

AF:

0.000783

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000108

Gnomad4 OTH exome

AF:

0.00124

GnomAD4 genome

AF:

0.00695

AC:

1059

AN:

152312

Hom.:

Cov.:

AF XY:

0.00678

AC XY:

505

AN XY:

74482

show subpopulations

Gnomad4 AFR

AF:

0.0246

Gnomad4 AMR

AF:

0.00216

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00189

Alfa

AF:

0.000753

Hom.:

Bravo

AF:

0.00787

ESP6500AA

AF:

0.0293

AC:

129

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00222

AC:

269

Asia WGS

AF:

0.00144

AC:

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jul 15, 2018	- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.095

BayesDel_addAF

Benign

-0.68

BayesDel_noAF

Benign

-0.73

CADD

Benign

9.9

DANN

Benign

0.81

DEOGEN2

Benign

0.090

Eigen

Benign

-0.87

Eigen_PC

Benign

-0.72

FATHMM_MKL

Benign

0.37

LIST_S2

Benign

0.67

MetaRNN

Benign

0.0090

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.27

MutationTaster

Benign

1.0

N;N;N;N

PrimateAI

Benign

0.25

PROVEAN

Benign

-0.67

REVEL

Benign

0.083

Sift

Benign

0.39

Sift4G

Benign

0.38

Polyphen

0.0

Vest4

0.046

MutPred

0.61

Gain of catalytic residue at V208 (P = 0.0318);

MVP

0.48

MPC

0.14

ClinPred

0.0024

GERP RS

3.9

Varity_R

0.10

gMVP

0.67

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over