2-96114964-T-C

Position:

• chr2-96114964-T-C

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 2P and 6B. PM2 BP4_Moderate BS2

The NM_000682.7(ADRA2B):​c.1186A>G​(p.Ile396Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,461,124 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/17 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (no stars).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: ADRA2B NM_000682.7 missense
• Clinical Significance: Uncertain significance no assertion criteria provided U:1
• Conservation: PhyloP100: 0.235

Genes affected

ADRA2B (HGNC:282): (adrenoceptor alpha 2B) This intronless gene encodes a seven-pass transmembrane protein. This protein is a member of a subfamily of G protein-coupled receptors that regulate neurotransmitter release from sympathetic nerves and from adrenergic neurons in the central nervous system. [provided by RefSeq, Apr 2014]

ACMG classification

Verdict is Likely_benign. Variant got -4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.14460716).
• BS2: High AC in GnomAdExome4 at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ADRA2B	NM_000682.7	c.1186A>G	p.Ile396Val	missense_variant	1/1	ENST00000620793.2	NP_000673.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ADRA2B	ENST00000620793.2	c.1186A>G	p.Ile396Val	missense_variant	1/1		NM_000682.7	ENSP00000480573	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.0000122 AC: 3 AN: 246562 Hom.: 0 AF XY: 0.0000149 AC XY: 2 AN XY: 134018

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000875

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: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461124 Hom.: 0 Cov.: 31 AF XY: 0.00000413 AC XY: 3 AN XY: 726820

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000897

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: 9.00e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: no assertion criteria provided

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

Genetics and Genomic Medicine Centre, NeuroGen Healthcare, NeuroGen Healthcare

Dec 27, 2020

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.073
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.32
CADD	Benign	13
DANN	Benign	0.93
Eigen	Benign	-0.35
Eigen_PC	Benign	-0.19
FATHMM_MKL	Benign	0.70	D
LIST_S2	Benign	0.84	T
M_CAP	Benign	0.0039	T
MetaRNN	Benign	0.14	T
MetaSVM	Benign	-1.1	T
MutationTaster	Benign	0.87	D
PrimateAI	Benign	0.46	T
Sift4G	Benign	1.0	T
Polyphen		0.047	B
Vest4		0.10
MVP		0.32
ClinPred		0.076	T
GERP RS		3.3
Varity_R		0.033
gMVP		0.43

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs1004815866; hg19: chr2-96780712;