Genetic Variant ADRA2A:p.Asn266Asn (chr10-111078794-C-T) – ACMG Classification: Likely_benign (-5 pts)

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_StrongBP7

The NM_000681.4(ADRA2A):c.798C>T(p.Asn266Asn) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000447 in 1,343,750 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000034 ( 0 hom. )

Consequence

ADRA2A
NM_000681.4 synonymous

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.608

Publications

14 publications found

Variant links:

Genes affected

ADRA2A (HGNC:281): (adrenoceptor alpha 2A) Alpha-2-adrenergic receptors are members of the G protein-coupled receptor superfamily. The alpha-2-adrenergic receptors are a type of adrenergic receptors (for adrenaline or epinephrine), which inhibit adenylate cyclase. These receptors include 3 highly homologous subtypes: alpha2A, alpha2B, and alpha2C. They are involved in regulating the release of neurotransmitter molecules from sympathetic nerves and from adrenergic neurons in the central nervous system. The sympathetic nervous system regulates cardiovascular function by activating adrenergic receptors in the heart, blood vessels and kidney. Studies in mouse revealed that both the alpha2A and alpha2C receptor subtypes were required for presynaptic transmitter release from the sympathetic nervous system in the heart and from central noradrenergic neurons. The alpha-2-adrenergic receptors are also involved in catecholamine signaling by extracellular regulated protein kinase 1 and 2 (ERK1/2) pathways. A clear association between the alpha-2-adrenergic receptor and disease has not been yet established. [provided by RefSeq, Sep 2019]

ADRA2A Gene-Disease associations (from GenCC):

lipodystrophy
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
lipodystrophy, familial partial, type 8
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ADRA2A links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.55).

BP7

Synonymous conserved (PhyloP=-0.608 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ADRA2A	NM_000681.4 link	c.798C>T	p.Asn266Asn	synonymous_variant	Exon 1 of 1	ENST00000280155.4	NP_000672.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ADRA2A	ENST00000280155.4 link	c.798C>T	p.Asn266Asn	synonymous_variant	Exon 1 of 1	6	NM_000681.4	ENSP00000280155.2

Frequencies

GnomAD3 genomes

AF:

0.0000133

AC:

AN:

150392

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.000580

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00

AC:

AN:

15456

AF XY:

0.00

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS 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:

0.00000335

AC:

AN:

1193358

Hom.:

Cov.:

AF XY:

0.00000346

AC XY:

AN XY:

577486

show subpopulations

African (AFR)

AF:

0.0000435

AC:

AN:

22998

American (AMR)

AF:

0.00

AC:

AN:

9166

Ashkenazi Jewish (ASJ)

AF:

0.0000643

AC:

AN:

15548

East Asian (EAS)

AF:

0.00

AC:

AN:

26300

South Asian (SAS)

AF:

0.0000225

AC:

AN:

44408

European-Finnish (FIN)

AF:

0.00

AC:

AN:

38768

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4826

European-Non Finnish (NFE)

AF:

0.00000102

AC:

AN:

983270

Other (OTH)

AF:

0.00

AC:

AN:

48074

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000133

AC:

AN:

150392

Hom.:

Cov.:

AF XY:

0.0000272

AC XY:

AN XY:

73432

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41216

American (AMR)

AF:

0.00

AC:

AN:

15070

Ashkenazi Jewish (ASJ)

AF:

0.000580

AC:

AN:

3448

East Asian (EAS)

AF:

0.00

AC:

AN:

5166

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

9876

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67494

Other (OTH)

AF:

0.00

AC:

AN:

2064

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.55

CADD

Benign

3.8

(source)

DANN

Benign

0.96

PhyloP100

-0.61

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over