rs150770296

Variant names:

• chr20-8649437-T-C
• rs150770296
• NM_015192.4:c.582T>C

Variant summary

Our verdict is Benign. The variant received -18 ACMG points: 0P and 18B. BP4_Moderate BP6_Very_Strong BS1 BS2

The NM_015192.4(PLCB1):​c.582T>C​(p.Leu194Leu) variant causes a synonymous change. The variant allele was found at a frequency of 0.000553 in 1,610,556 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0032 (2 hom., cov: 32)
  • Exomes 𝑓: 0.00027 (0 hom.)
• Consequence: PLCB1 NM_015192.4 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4
• Conservation: PhyloP100: 3.59
• Publications: 0 publications found

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]

PLCB1 Gene-Disease associations (from GenCC):

• genetic developmental and epileptic encephalopathy

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• developmental and epileptic encephalopathy, 12

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• infantile spasms

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• malignant migrating partial seizures of infancy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

LOC105372521 (HGNC:):

ACMG classification

Our verdict: Benign. The variant received -18 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.46).
• BP6: Variant 20-8649437-T-C is Benign according to our data. Variant chr20-8649437-T-C is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 129915.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00323 (492/152292) while in subpopulation AFR AF = 0.0114 (475/41548). AF 95% confidence interval is 0.0106. There are 2 homozygotes in GnomAd4. There are 230 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.
• BS2: High Homozygotes in GnomAd4 at 2 AD,AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015192.4. 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
	PLCB1	NM_015192.4	MANE Select	c.582T>C	p.Leu194Leu	synonymous	Exon 7 of 32	NP_056007.1	Q9NQ66-1
	PLCB1	NM_182734.3		c.582T>C	p.Leu194Leu	synonymous	Exon 7 of 33	NP_877398.1	Q9NQ66-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PLCB1	ENST00000338037.11	TSL:1 MANE Select	c.582T>C	p.Leu194Leu	synonymous	Exon 7 of 32	ENSP00000338185.6	Q9NQ66-1
	PLCB1	ENST00000378637.6	TSL:1	c.582T>C	p.Leu194Leu	synonymous	Exon 7 of 32	ENSP00000367904.2	Q9NQ66-2
	PLCB1	ENST00000378641.7	TSL:1	c.582T>C	p.Leu194Leu	synonymous	Exon 7 of 33	ENSP00000367908.3	Q9NQ66-2

Frequencies

GnomAD3 genomes AF: 0.00323 AC: 492 AN: 152174 Hom.: 2 Cov.: 32

Gnomad AFR AF: 0.0115

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000458

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000414

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.00239

GnomAD2 exomes AF: 0.000855 AC: 215 AN: 251396 AF XY: 0.000530

Gnomad AFR exome AF: 0.0126

Gnomad AMR exome AF: 0.000202

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000880

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.000273 AC: 398 AN: 1458264 Hom.: 0 Cov.: 28 AF XY: 0.000229 AC XY: 166 AN XY: 725804

African (AFR) AF: 0.0106 AC: 354 AN: 33386

American (AMR) AF: 0.000179 AC: 8 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26110

East Asian (EAS) AF: 0.00 AC: 0 AN: 39676

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86176

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.00000541 AC: 6 AN: 1108754

Other (OTH) AF: 0.000481 AC: 29 AN: 60266

GnomAD4 genome AF: 0.00323 AC: 492 AN: 152292 Hom.: 2 Cov.: 32 AF XY: 0.00309 AC XY: 230 AN XY: 74460

African (AFR) AF: 0.0114 AC: 475 AN: 41548

American (AMR) AF: 0.000458 AC: 7 AN: 15296

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5182

South Asian (SAS) AF: 0.000415 AC: 2 AN: 4824

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10620

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000441 AC: 3 AN: 68032

Other (OTH) AF: 0.00237 AC: 5 AN: 2114

Alfa AF: 0.00178 Hom.: 2

Bravo AF: 0.00372

Asia WGS AF: 0.000577 AC: 2 AN: 3478

EpiCase AF: 0.0000546

EpiControl AF: 0.00

ClinVar

ClinVar submissions

Significance: Benign/Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	1	Developmental and epileptic encephalopathy, 12 (1)
-	-	1	Inborn genetic diseases (1)
-	-	1	not provided (1)
-	-	1	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.46
CADD	Benign	13
DANN	Benign	0.81
PhyloP100		3.6
PromoterAI		-0.0075	Neutral
Mutation Taster		=100/0	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs150770296; hg19: chr20-8630084;