20-37519170-T-C

Position:

• chr20-37519170-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_006698.4(BLCAP):​c.5A>G​(p.Tyr2Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely benign in UniProt.

• Frequency: Genomes: not found (cov: 31)
• Consequence: BLCAP NM_006698.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.81

Genes affected

BLCAP (HGNC:1055): (BLCAP apoptosis inducing factor) This gene encodes a protein that reduces cell growth by stimulating apoptosis. Alternative splicing and the use of alternative promoters result in multiple transcript variants encoding the same protein. This gene is imprinted in brain where different transcript variants are expressed from each parental allele. Transcript variants initiating from the upstream promoter are expressed preferentially from the maternal allele, while transcript variants initiating downstream of the interspersed NNAT gene (GeneID:4826) are expressed from the paternal allele. Transcripts at this locus may also undergo A to I editing, resulting in amino acid changes at three positions in the N-terminus of the protein. [provided by RefSeq, Nov 2015]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.895

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BLCAP	NM_006698.4	c.5A>G	p.Tyr2Cys	missense_variant	2/2	ENST00000373537.7	NP_006689.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BLCAP	ENST00000373537.7	c.5A>G	p.Tyr2Cys	missense_variant	2/2	1	NM_006698.4	ENSP00000362637.2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.97
BayesDel_addAF	Pathogenic	0.46	D
BayesDel_noAF	Pathogenic	0.43
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.43	T;T;T;T;T;T;T;T;.;.;.
Eigen	Pathogenic	0.69
Eigen_PC	Pathogenic	0.68
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.97	.;.;.;D;.;.;.;.;D;D;.
M_CAP	Uncertain	0.086	D
MetaRNN	Pathogenic	0.90	D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	-0.15	T
PrimateAI	Pathogenic	0.82	D
PROVEAN	Pathogenic	-7.9	D;.;D;D;D;D;D;D;D;D;D
REVEL	Uncertain	0.58
Sift	Benign	0.047	D;.;D;D;D;D;D;D;D;D;.
Sift4G	Pathogenic	0.0010	D;.;D;D;D;D;D;.;.;D;.
Polyphen		1.0	D;D;D;D;D;D;D;D;.;.;.
Vest4		0.94
MutPred		0.70		Loss of helix (P = 0.0376);Loss of helix (P = 0.0376);Loss of helix (P = 0.0376);Loss of helix (P = 0.0376);Loss of helix (P = 0.0376);Loss of helix (P = 0.0376);Loss of helix (P = 0.0376);Loss of helix (P = 0.0376);Loss of helix (P = 0.0376);Loss of helix (P = 0.0376);Loss of helix (P = 0.0376);
MVP		0.25
MPC		1.8
ClinPred		1.0	D
GERP RS		5.1
Varity_R		0.69
gMVP		0.76

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

LitVar

Other links and lift over

dbSNP: rs11557677; hg19: chr20-36147572;