chr7-2538558-G-C

Variant names:

• chr7-2538558-G-C
• rs748335252
• NM_152743.4:c.1977C>G

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_152743.4(BRAT1):​c.1977C>G​(p.Leu659Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000414 in 1,448,330 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. Synonymous variant affecting the same amino acid position (i.e. L659L) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: BRAT1 NM_152743.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.315
• Publications: 0 publications found

Genes affected

BRAT1 (HGNC:21701): (BRCA1 associated ATM activator 1) The protein encoded by this ubiquitously expressed gene interacts with the tumor suppressing BRCA1 (breast cancer 1) protein and and the ATM (ataxia telangiectasia mutated) protein. ATM is thought to be a master controller of cell cycle checkpoint signalling pathways that are required for cellular responses to DNA damage such as double-strand breaks that are induced by ionizing radiation and complexes with BRCA1 in the multi-protein complex BASC (BRAC1-associated genome surveillance complex). The protein encoded by this gene is thought to play a role in the DNA damage pathway regulated by BRCA1 and ATM. [provided by RefSeq, Mar 2012]

BRAT1 Gene-Disease associations (from GenCC):

• neonatal-onset encephalopathy with rigidity and seizures

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet, ClinGen, G2P, Labcorp Genetics (formerly Invitae)
• neurodevelopmental disorder with cerebellar atrophy and with or without seizures

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen, Ambry Genetics

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.88).
• BP7: Synonymous conserved (PhyloP=-0.315 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_152743.4. 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
	BRAT1	NM_152743.4	MANE Select	c.1977C>G	p.Leu659Leu	synonymous	Exon 14 of 14	NP_689956.2
	BRAT1	NM_001350626.2		c.2157C>G	p.Leu719Leu	synonymous	Exon 14 of 14	NP_001337555.1
	BRAT1	NM_001350627.2		c.1452C>G	p.Leu484Leu	synonymous	Exon 13 of 13	NP_001337556.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BRAT1	ENST00000340611.9	TSL:1 MANE Select	c.1977C>G	p.Leu659Leu	synonymous	Exon 14 of 14	ENSP00000339637.4
	BRAT1	ENST00000467558.5	TSL:5	n.3763C>G		non_coding_transcript_exon	Exon 10 of 10
	BRAT1	ENST00000469750.5	TSL:2	n.4549C>G		non_coding_transcript_exon	Exon 11 of 11

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 0.00000414 AC: 6 AN: 1448330 Hom.: 0 Cov.: 64 AF XY: 0.00000416 AC XY: 3 AN XY: 720640

African (AFR) AF: 0.00 AC: 0 AN: 33394

American (AMR) AF: 0.00 AC: 0 AN: 44336

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26032

East Asian (EAS) AF: 0.00 AC: 0 AN: 39546

South Asian (SAS) AF: 0.00 AC: 0 AN: 86028

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 43314

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5748

European-Non Finnish (NFE) AF: 0.00000541 AC: 6 AN: 1109848

Other (OTH) AF: 0.00 AC: 0 AN: 60084

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.88
CADD	Benign	1.2
DANN	Benign	0.45
PhyloP100		-0.32

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: rs748335252; hg19: chr7-2578192;