chr12-27396250-T-C

Variant names:

• chr12-27396250-T-C
• rs12299407
• NM_020183.6:c.920-4284T>C

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_020183.6(BMAL2):​c.920-4284T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.173 in 152,076 control chromosomes in the GnomAD database, including 3,059 homozygotes. 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 0.17 (3059 hom., cov: 32)
• Consequence: BMAL2 NM_020183.6 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.183
• Publications: 1 publications found

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

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.92).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.323 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020183.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BMAL2	NM_020183.6	MANE Select	c.920-4284T>C		intron	N/A	NP_064568.3
	BMAL2	NM_001394524.1		c.953-4284T>C		intron	N/A	NP_001381453.1
	BMAL2	NM_001394525.1		c.911-4284T>C		intron	N/A	NP_001381454.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BMAL2	ENST00000266503.10	TSL:1 MANE Select	c.920-4284T>C		intron	N/A	ENSP00000266503.5
	BMAL2	ENST00000311001.9	TSL:1	c.878-4284T>C		intron	N/A	ENSP00000312247.5
	BMAL2	ENST00000395901.6	TSL:1	c.809-4284T>C		intron	N/A	ENSP00000379238.2

Frequencies

GnomAD3 genomes AF: 0.173 AC: 26289 AN: 151958 Hom.: 3036 Cov.: 32

Gnomad AFR AF: 0.327

Gnomad AMI AF: 0.0921

Gnomad AMR AF: 0.0918

Gnomad ASJ AF: 0.0740

Gnomad EAS AF: 0.121

Gnomad SAS AF: 0.134

Gnomad FIN AF: 0.151

Gnomad MID AF: 0.136

Gnomad NFE AF: 0.115

Gnomad OTH AF: 0.134

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.173 AC: 26352 AN: 152076 Hom.: 3059 Cov.: 32 AF XY: 0.173 AC XY: 12889 AN XY: 74344

African (AFR) AF: 0.328 AC: 13592 AN: 41428

American (AMR) AF: 0.0917 AC: 1403 AN: 15296

Ashkenazi Jewish (ASJ) AF: 0.0740 AC: 257 AN: 3472

East Asian (EAS) AF: 0.120 AC: 623 AN: 5174

South Asian (SAS) AF: 0.135 AC: 651 AN: 4826

European-Finnish (FIN) AF: 0.151 AC: 1597 AN: 10588

Middle Eastern (MID) AF: 0.143 AC: 42 AN: 294

European-Non Finnish (NFE) AF: 0.115 AC: 7821 AN: 67974

Other (OTH) AF: 0.134 AC: 282 AN: 2112

Alfa AF: 0.156 Hom.: 306

Bravo AF: 0.173

Asia WGS AF: 0.139 AC: 480 AN: 3476

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
CADD	Benign	3.2
DANN	Benign	0.53
PhyloP100		0.18
Mutation Taster		=100/0	polymorphism (auto)

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

Other links and lift over

dbSNP: rs12299407; hg19: chr12-27549183;