rs9661807

chr1-204430938-A-G

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_001377334.1(PIK3C2B):c.4280+731T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.255 in 152,166 control chromosomes in the GnomAD database, including 5,675 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 0.26 (5675 hom., cov: 33)
• Consequence: PIK3C2B NM_001377334.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.384

Genes affected

PIK3C2B (HGNC:8972): (phosphatidylinositol-4-phosphate 3-kinase catalytic subunit type 2 beta) The protein encoded by this gene belongs to the phosphoinositide 3-kinase (PI3K) family. PI3-kinases play roles in signaling pathways involved in cell proliferation, oncogenic transformation, cell survival, cell migration, and intracellular protein trafficking. This protein contains a lipid kinase catalytic domain as well as a C-terminal C2 domain, a characteristic of class II PI3-kinases. C2 domains act as calcium-dependent phospholipid binding motifs that mediate translocation of proteins to membranes, and may also mediate protein-protein interactions. The PI3-kinase activity of this protein is sensitive to low nanomolar levels of the inhibitor wortmanin. The C2 domain of this protein was shown to bind phospholipids but not Ca2+, which suggests that this enzyme may function in a calcium-independent manner. [provided by RefSeq, Jul 2008]

PPP1R15B-AS1 (HGNC:55838): (PPP1R15B and PIK3C2B antisense RNA 1)

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-1.03).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.537 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PIK3C2B	NM_001377334.1	c.4280+731T>C		intron_variant		ENST00000684373.1
PIK3C2B	NM_001377335.1	c.4196+731T>C		intron_variant
PIK3C2B	NM_002646.4	c.4280+731T>C		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PIK3C2B	ENST00000684373.1	c.4280+731T>C		intron_variant			NM_001377334.1	P1
PPP1R15B-AS1	ENST00000443515.1	n.147-4399A>G		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes AF: 0.255 AC: 38796 AN: 152048 Hom.: 5657 Cov.: 33

Gnomad AFR AF: 0.353

Gnomad AMI AF: 0.325

Gnomad AMR AF: 0.237

Gnomad ASJ AF: 0.200

Gnomad EAS AF: 0.554

Gnomad SAS AF: 0.295

Gnomad FIN AF: 0.253

Gnomad MID AF: 0.291

Gnomad NFE AF: 0.176

Gnomad OTH AF: 0.240

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

GnomAD4 genome AF: 0.255 AC: 38841 AN: 152166 Hom.: 5675 Cov.: 33 AF XY: 0.261 AC XY: 19438 AN XY: 74406

Gnomad4 AFR AF: 0.354

Gnomad4 AMR AF: 0.238

Gnomad4 ASJ AF: 0.200

Gnomad4 EAS AF: 0.554

Gnomad4 SAS AF: 0.292

Gnomad4 FIN AF: 0.253

Gnomad4 NFE AF: 0.176

Gnomad4 OTH AF: 0.239

Alfa AF: 0.225 Hom.: 480

Bravo AF: 0.257

Asia WGS AF: 0.366 AC: 1269 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-1.0
Cadd	Benign	0.93
Dann	Benign	0.32

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: rs9661807; hg19: chr1-204400066;