NM_015192.4:c.99+1307A>G

Variant names:

• chr20-8134057-A-G
• rs6118083
• NM_015192.4:c.99+1307A>G

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_015192.4(PLCB1):​c.99+1307A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.174 in 152,212 control chromosomes in the GnomAD database, including 2,483 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.17 (2483 hom., cov: 33)
• Consequence: PLCB1 NM_015192.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.684
• Publications: 18 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

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.81).
• BA1: GnomAd4 highest subpopulation (AMR) allele frequency at 95% confidence interval = 0.196 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PLCB1	NM_015192.4	c.99+1307A>G		intron_variant	Intron 1 of 31	ENST00000338037.11	NP_056007.1
PLCB1	NM_182734.3	c.99+1307A>G		intron_variant	Intron 1 of 32		NP_877398.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PLCB1	ENST00000338037.11	c.99+1307A>G		intron_variant	Intron 1 of 31	1	NM_015192.4	ENSP00000338185.6

Frequencies

GnomAD3 genomes AF: 0.174 AC: 26441 AN: 152094 Hom.: 2488 Cov.: 33

Gnomad AFR AF: 0.107

Gnomad AMI AF: 0.250

Gnomad AMR AF: 0.202

Gnomad ASJ AF: 0.269

Gnomad EAS AF: 0.163

Gnomad SAS AF: 0.148

Gnomad FIN AF: 0.235

Gnomad MID AF: 0.188

Gnomad NFE AF: 0.195

Gnomad OTH AF: 0.187

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.174 AC: 26445 AN: 152212 Hom.: 2483 Cov.: 33 AF XY: 0.175 AC XY: 12991 AN XY: 74408

African (AFR) AF: 0.107 AC: 4434 AN: 41532

American (AMR) AF: 0.202 AC: 3088 AN: 15290

Ashkenazi Jewish (ASJ) AF: 0.269 AC: 934 AN: 3470

East Asian (EAS) AF: 0.164 AC: 849 AN: 5184

South Asian (SAS) AF: 0.148 AC: 715 AN: 4830

European-Finnish (FIN) AF: 0.235 AC: 2489 AN: 10592

Middle Eastern (MID) AF: 0.178 AC: 52 AN: 292

European-Non Finnish (NFE) AF: 0.195 AC: 13264 AN: 67998

Other (OTH) AF: 0.186 AC: 392 AN: 2112

Alfa AF: 0.192 Hom.: 10543

Bravo AF: 0.174

Asia WGS AF: 0.169 AC: 592 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.81
CADD	Benign	1.2
DANN	Benign	0.42
PhyloP100		-0.68
Mutation Taster		=100/0	polymorphism (auto)

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

Other links and lift over

dbSNP: rs6118083; hg19: chr20-8114704;