19-47228311-C-A

Position:

• chr19-47228311-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_014417.5(BBC3):​c.121G>T​(p.Glu41*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: BBC3 NM_014417.5 stop_gained
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.18

Genes affected

BBC3 (HGNC:17868): (BCL2 binding component 3) This gene encodes a member of the BCL-2 family of proteins. This family member belongs to the BH3-only pro-apoptotic subclass. The protein cooperates with direct activator proteins to induce mitochondrial outer membrane permeabilization and apoptosis. It can bind to anti-apoptotic Bcl-2 family members to induce mitochondrial dysfunction and caspase activation. Because of its pro-apoptotic role, this gene is a potential drug target for cancer therapy and for tissue injury. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2011]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BBC3	NM_014417.5	c.121G>T	p.Glu41*	stop_gained	2/4	ENST00000439096.3	NP_055232.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BBC3	ENST00000439096.3	c.121G>T	p.Glu41*	stop_gained	2/4	1	NM_014417.5	ENSP00000395862.2
BBC3	ENST00000449228.5	c.224G>T	p.Arg75Leu	missense_variant	2/4	1		ENSP00000404503.1
BBC3	ENST00000341983.8	c.89-1557G>T		intron_variant		1		ENSP00000341155.4
BBC3	ENST00000300880.11	c.88+4204G>T		intron_variant		1		ENSP00000300880.7

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1072694 Hom.: 0 Cov.: 34 AF XY: 0.00 AC XY: 0 AN XY: 506732

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 26, 2022

The c.224G>T (p.R75L) alteration is located in exon 2 (coding exon 2) of the BBC3 gene. This alteration results from a G to T substitution at nucleotide position 224, causing the arginine (R) at amino acid position 75 to be replaced by a leucine (L). 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	0.28
BayesDel_addAF	Benign	-0.083	T
BayesDel_noAF	Benign	-0.090
CADD	Pathogenic	37
DANN	Uncertain	1.0
Eigen	Benign	-0.12
Eigen_PC	Benign	-0.15
FATHMM_MKL	Uncertain	0.84	D
Vest4		0.61
ClinPred		0.49	T
GERP RS		1.8

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-47731568;