20-8881804-G-T

Position:

• chr20-8881804-G-T

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 3P and 4B. PM2 PP2 BP4_Strong

The NM_015192.4(PLCB1):​c.3606G>T​(p.Glu1202Asp) variant causes a missense 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. 15/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in same amino acid change has been previously reported as Uncertain significancein ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PLCB1 NM_015192.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.208

Genes affected

PLCB1 (HGNC:15917): (phospholipase C beta 1) The protein encoded by this gene catalyzes the formation of inositol 1,4,5-trisphosphate and diacylglycerol from phosphatidylinositol 4,5-bisphosphate. This reaction uses calcium as a cofactor and plays an important role in the intracellular transduction of many extracellular signals. This gene is activated by two G-protein alpha subunits, alpha-q and alpha-11. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), PLCB1. . Gene score misZ 3.8345 (greater than the threshold 3.09). Trascript score misZ 3.6982 (greater than threshold 3.09). GenCC has associacion of gene with developmental and epileptic encephalopathy, 12, malignant migrating partial seizures of infancy, developmental and epileptic encephalopathy, West syndrome.
• BP4: Computational evidence support a benign effect (MetaRNN=0.044243425).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PLCB1	NM_015192.4	c.3606G>T	p.Glu1202Asp	missense_variant	32/32	ENST00000338037.11
PLCB1	NM_182734.3	c.*202G>T		3_prime_UTR_variant	33/33

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PLCB1	ENST00000338037.11	c.3606G>T	p.Glu1202Asp	missense_variant	32/32	1	NM_015192.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.051
BayesDel_addAF	Benign	-0.34	T
BayesDel_noAF	Benign	-0.72
CADD	Benign	1.3
DANN	Benign	0.95
DEOGEN2	Benign	0.20	T;.
Eigen	Benign	-0.91
Eigen_PC	Benign	-0.81
FATHMM_MKL	Uncertain	0.76	D
LIST_S2	Benign	0.71	T;T
M_CAP	Benign	0.0032	T
MetaRNN	Benign	0.044	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.0	N;.
MutationTaster	Benign	1.0	D;N
PrimateAI	Benign	0.40	T
PROVEAN	Benign	-0.21	N;.
REVEL	Benign	0.057
Sift	Benign	0.18	T;.
Sift4G	Benign	0.42	T;T
Polyphen		0.0	B;.
Vest4		0.17
MutPred		0.13		Gain of loop (P = 0.1069);.;
MVP		0.28
MPC		0.29
ClinPred		0.12	T
GERP RS		-1.3
Varity_R		0.067
gMVP		0.061

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: chr20-8862451;