chr20-31721661-G-C

Variant names:

• chr20-31721661-G-C
• rs778992647
• NM_138578.3:c.558C>G

Variant summary

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

The NM_138578.3(BCL2L1):​c.558C>G​(p.Gly186Gly) variant causes a synonymous 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. G186G) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: BCL2L1 NM_138578.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.85
• Publications: 0 publications found

Genes affected

BCL2L1 (HGNC:992): (BCL2 like 1) The protein encoded by this gene belongs to the BCL-2 protein family. BCL-2 family members form hetero- or homodimers and act as anti- or pro-apoptotic regulators that are involved in a wide variety of cellular activities. The proteins encoded by this gene are located at the outer mitochondrial membrane, and have been shown to regulate outer mitochondrial membrane channel (VDAC) opening. VDAC regulates mitochondrial membrane potential, and thus controls the production of reactive oxygen species and release of cytochrome C by mitochondria, both of which are the potent inducers of cell apoptosis. Alternative splicing results in multiple transcript variants encoding two different isoforms. The longer isoform acts as an apoptotic inhibitor and the shorter isoform acts as an apoptotic activator. [provided by RefSeq, Dec 2015]

ABALON (HGNC:):

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=-0.56).
• BP7: Synonymous conserved (PhyloP=1.85 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_138578.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BCL2L1	NM_138578.3	MANE Select	c.558C>G	p.Gly186Gly	synonymous	Exon 2 of 3	NP_612815.1	Q07817-1
	BCL2L1	NM_001317919.2		c.558C>G	p.Gly186Gly	synonymous	Exon 2 of 3	NP_001304848.1	A0A0S2Z3C5
	BCL2L1	NM_001317920.2		c.558C>G	p.Gly186Gly	synonymous	Exon 2 of 3	NP_001304849.1	Q07817-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BCL2L1	ENST00000307677.5	TSL:1 MANE Select	c.558C>G	p.Gly186Gly	synonymous	Exon 2 of 3	ENSP00000302564.4	Q07817-1
	BCL2L1	ENST00000376062.6	TSL:1	c.558C>G	p.Gly186Gly	synonymous	Exon 1 of 2	ENSP00000365230.2	Q07817-1
	BCL2L1	ENST00000450273.2	TSL:3	c.558C>G	p.Gly186Gly	synonymous	Exon 2 of 4	ENSP00000406203.2	Q5TE64

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.56
CADD	Benign	17
DANN	Benign	0.83
PhyloP100		1.9

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.10		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: rs778992647; hg19: chr20-30309464;