rs149661663

Positions:

• chr20-8684958-C-G
• chr20-8684958-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP2

The NM_015192.4(PLCB1):​c.889C>G​(p.Arg297Gly) variant causes a missense 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. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R297H) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PLCB1 NM_015192.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.37

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 Uncertain_significance. Variant got 3 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.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PLCB1	NM_015192.4	c.889C>G	p.Arg297Gly	missense_variant	10/32	ENST00000338037.11
PLCB1	NM_182734.3	c.889C>G	p.Arg297Gly	missense_variant	10/33

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PLCB1	ENST00000338037.11	c.889C>G	p.Arg297Gly	missense_variant	10/32	1	NM_015192.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.22
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.030
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.70	.;.;.;D;.;T;.;T
Eigen	Uncertain	0.37
Eigen_PC	Uncertain	0.46
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Benign	0.80	T;T;.;T;T;T;T;T
M_CAP	Benign	0.014	T
MetaRNN	Uncertain	0.61	D;D;D;D;D;D;D;D
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.6	.;.;M;M;M;.;.;.
MutationTaster	Benign	0.99	D;D;D
PrimateAI	Uncertain	0.66	T
PROVEAN	Uncertain	-4.0	.;.;D;D;D;.;.;.
REVEL	Benign	0.27
Sift	Benign	0.037	.;.;D;D;D;.;.;.
Sift4G	Uncertain	0.047	.;D;T;T;T;T;T;T
Polyphen		0.93, 0.082	.;.;P;B;P;.;.;.
Vest4		0.82, 0.83
MutPred		0.69		.;.;Loss of MoRF binding (P = 0.0335);Loss of MoRF binding (P = 0.0335);Loss of MoRF binding (P = 0.0335);.;.;.;
MVP		0.69
MPC		1.7
ClinPred		0.92	D
GERP RS		6.1
Varity_R		0.78
gMVP		0.72

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: rs149661663; hg19: chr20-8665605;