NM_138761.4:c.120_121delGG

Variant names:

• chr19-48955713-TGG-T
• rs398122840
• NM_138761.4:c.120_121delGG

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PVS1 PM2

The NM_138761.4(BAX):​c.120_121delGG​(p.Glu41GlyfsTer32) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 31)
• Consequence: BAX NM_138761.4 frameshift
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.63
• Publications: 0 publications found

Genes affected

BAX (HGNC:959): (BCL2 associated X, apoptosis regulator) The protein encoded by this gene belongs to the BCL2 protein family. BCL2 family members form hetero- or homodimers and act as anti- or pro-apoptotic regulators that are involved in a wide variety of cellular activities. This protein forms a heterodimer with BCL2, and functions as an apoptotic activator. The association and the ratio of BAX to BCL2 also determines survival or death of a cell following an apoptotic stimulus. This protein is reported to interact with, and increase the opening of, the mitochondrial voltage-dependent anion channel (VDAC), which leads to the loss in membrane potential and the release of cytochrome c. The expression of this gene is regulated by the tumor suppressor P53 and has been shown to be involved in P53-mediated apoptosis. Multiple alternatively spliced transcript variants, which encode different isoforms, have been reported for this gene. [provided by RefSeq, Dec 2019]

BAX Gene-Disease associations (from GenCC):

• leukemia, acute lymphocytic, susceptibility to, 1

  Inheritance: Unknown Classification: LIMITED Submitted by: Ambry Genetics

ENSG00000305635 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_138761.4. 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
	BAX	NM_138761.4	MANE Select	c.120_121delGG	p.Glu41GlyfsTer32	frameshift	Exon 3 of 6	NP_620116.1
	BAX	NM_001291428.2		c.120_121delGG	p.Glu41GlyfsTer32	frameshift	Exon 3 of 6	NP_001278357.1
	BAX	NM_004324.4		c.120_121delGG	p.Glu41GlyfsTer32	frameshift	Exon 3 of 5	NP_004315.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BAX	ENST00000345358.12	TSL:1 MANE Select	c.120_121delGG	p.Glu41GlyfsTer32	frameshift	Exon 3 of 6	ENSP00000263262.9
	BAX	ENST00000293288.12	TSL:1	c.120_121delGG	p.Glu41GlyfsTer32	frameshift	Exon 3 of 5	ENSP00000293288.8
	BAX	ENST00000415969.6	TSL:1	c.120_121delGG	p.Glu41GlyfsTer32	frameshift	Exon 3 of 6	ENSP00000389971.2

Frequencies

GnomAD3 genomes Cov.: 31

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

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		1.6

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: rs398122840; hg19: chr19-49458970; COSMIC: COSV53172057; COSMIC: COSV53172057;