12-27415902-T-A

Position:

chr12-27415902-T-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_020183.6(BMAL2):c.1620T>A(p.Ser540Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000445 in 1,608,404 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00024 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00047 ( 0 hom. )

Consequence

BMAL2
NM_020183.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.808

Variant links:

Genes affected

BMAL2 (HGNC:18984): (basic helix-loop-helix ARNT like 2) This gene encodes a basic helix-loop-helix transcription factor belonging to the PAS (PER, ARNT, SIM) superfamily. The PAS proteins play important roles in adaptation to low atmospheric and cellular oxygen levels, exposure to certain environmental pollutants, and diurnal oscillations in light and temperature. This protein forms a transcriptionally active heterodimer with the circadian CLOCK protein, the structurally related MOP4, and hypoxia-inducible factors, such as HIF1alpha. Consistent with its role as a biologically relevant partner of circadian and hypoxia factors, this protein is coexpressed in regions of the brain such as the thalamus, hypothalamus, and amygdala. Alternatively spliced transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, Oct 2011]

BMAL2 links:

BMAL2-AS1 (HGNC:49892): (BMAL2 antisense RNA 1)

BMAL2-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.12793708).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BMAL2	NM_020183.6 linkuse as main transcript	c.1620T>A	p.Ser540Arg	missense_variant	15/17	ENST00000266503.10
BMAL2-AS1	NR_109975.1 linkuse as main transcript	n.139-21279A>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BMAL2	ENST00000266503.10 linkuse as main transcript	c.1620T>A	p.Ser540Arg	missense_variant	15/17	1	NM_020183.6	P2	Q8WYA1-1
BMAL2-AS1	ENST00000500498.2 linkuse as main transcript	n.130-21279A>T		intron_variant, non_coding_transcript_variant		1

Frequencies

GnomAD3 genomes

AF:

0.000237

AC:

AN:

152138

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000500

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000220

AC:

AN:

249720

Hom.:

AF XY:

0.000281

AC XY:

AN XY:

135064

show subpopulations

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000488

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000466

AC:

679

AN:

1456266

Hom.:

Cov.:

AF XY:

0.000440

AC XY:

319

AN XY:

724724

show subpopulations

Gnomad4 AFR exome

AF:

0.0000900

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000117

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000592

Gnomad4 OTH exome

AF:

0.000316

GnomAD4 genome

AF:

0.000237

AC:

AN:

152138

Hom.:

Cov.:

AF XY:

0.000202

AC XY:

AN XY:

74312

show subpopulations

Gnomad4 AFR

AF:

0.0000483

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000500

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000424

Hom.:

Bravo

AF:

0.000242

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00130

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000222

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 27, 2022

The c.1620T>A (p.S540R) alteration is located in exon 15 (coding exon 15) of the ARNTL2 gene. This alteration results from a T to A substitution at nucleotide position 1620, causing the serine (S) at amino acid position 540 to be replaced by an arginine (R). 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

0.22

BayesDel_addAF

Benign

-0.42

BayesDel_noAF

Benign

-0.41

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.18

.;.;.;.;.;T;.

Eigen

Benign

-0.10

Eigen_PC

Benign

-0.19

FATHMM_MKL

Benign

0.69

LIST_S2

Benign

0.76

T;T;T;T;T;T;T

M_CAP

Benign

0.0059

MetaRNN

Benign

0.13

T;T;T;T;T;T;T

MetaSVM

Benign

-0.76

MutationAssessor

Uncertain

2.8

.;.;.;.;.;M;.

MutationTaster

Benign

0.96

D;D;D;D;D;D;D

PrimateAI

Benign

0.33

PROVEAN

Uncertain

-2.5

D;D;D;D;D;D;D

REVEL

Benign

0.16

Sift

Uncertain

0.023

D;D;D;D;D;D;D

Sift4G

Uncertain

0.0070

D;D;D;D;D;D;D

Polyphen

0.95

P;D;.;P;D;P;.

Vest4

0.18

MutPred

0.34

.;.;.;.;.;Gain of catalytic residue at L544 (P = 0.0256);.;

MVP

0.56

MPC

0.13

ClinPred

0.19

GERP RS

0.26

Varity_R

0.090

gMVP

0.57

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