20-9387476-G-A

Position:

• chr20-9387476-G-A

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM2 PM5 PP2 PP3_Strong PP5

The NM_001377142.1(PLCB4):​c.1078G>A​(p.Asp360Asn) 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. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D360V) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PLCB4 NM_001377142.1 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 9.98

Genes affected

PLCB4 (HGNC:9059): (phospholipase C beta 4) 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 in the retina. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Feb 2010]

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr20-9387477-A-T is described in ClinVar as [Pathogenic]. Clinvar id is 64695.Status of the report is no_assertion_criteria_provided, 0 stars.
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), PLCB4. . Gene score misZ 3.5718 (greater than the threshold 3.09). Trascript score misZ 3.2758 (greater than threshold 3.09). GenCC has associacion of gene with auriculocondylar syndrome 1, auriculocondylar syndrome, auriculocondylar syndrome 2.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.964
• PP5: Variant 20-9387476-G-A is Pathogenic according to our data. Variant chr20-9387476-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 64694.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PLCB4	NM_001377142.1	c.1078G>A	p.Asp360Asn	missense_variant	15/40	ENST00000378473.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PLCB4	ENST00000378473.9	c.1078G>A	p.Asp360Asn	missense_variant	15/40	1	NM_001377142.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 25

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Auriculocondylar syndrome 2 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Mar 01, 2013

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Uncertain	0.093	D
BayesDel_noAF	Benign	-0.10
CADD	Pathogenic	33
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.89	.;D;.;D;.
Eigen	Pathogenic	1.2
Eigen_PC	Pathogenic	1.1
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	1.0	D;D;.;.;D
M_CAP	Pathogenic	0.59	D
MetaRNN	Pathogenic	0.96	D;D;D;D;D
MetaSVM	Pathogenic	0.80	D
MutationAssessor	Pathogenic	4.2	H;H;H;H;H
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Pathogenic	0.91	D
PROVEAN	Pathogenic	-4.8	D;D;N;D;D
REVEL	Pathogenic	0.67
Sift	Pathogenic	0.0	D;D;T;D;D
Sift4G	Pathogenic	0.0	D;D;D;D;D
Polyphen		1.0, 1.0	.;D;.;D;D
Vest4		0.99
MutPred		0.84		Gain of methylation at R355 (P = 0.188);Gain of methylation at R355 (P = 0.188);Gain of methylation at R355 (P = 0.188);Gain of methylation at R355 (P = 0.188);Gain of methylation at R355 (P = 0.188);
MVP		0.91
MPC		1.7
ClinPred		1.0	D
GERP RS		5.9
Varity_R		0.93
gMVP		0.92

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs397514770; hg19: chr20-9368123;