chr19-18167318-C-G

Variant names:

• chr19-18167318-C-G
• rs112411913
• NM_005027.4:c.1736+12C>G

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_005027.4(PIK3R2):​c.1736+12C>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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: not found (cov: 31)
• Consequence: PIK3R2 NM_005027.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.24
• Publications: 0 publications found

Genes affected

PIK3R2 (HGNC:8980): (phosphoinositide-3-kinase regulatory subunit 2) Phosphatidylinositol 3-kinase (PI3K) is a lipid kinase that phosphorylates phosphatidylinositol and similar compounds, creating second messengers important in growth signaling pathways. PI3K functions as a heterodimer of a regulatory and a catalytic subunit. The protein encoded by this gene is a regulatory component of PI3K. Three transcript variants, one protein coding and the other two non-protein coding, have been found for this gene. [provided by RefSeq, Apr 2019]

PIK3R2 Gene-Disease associations (from GenCC):

• megalencephaly-polymicrogyria-polydactyly-hydrocephalus syndrome 1

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Illumina, G2P, Genomics England PanelApp
• overgrowth syndrome and/or cerebral malformations due to abnormalities in MTOR pathway genes

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• megalencephaly-polymicrogyria-postaxial polydactyly-hydrocephalus syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000268173 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005027.4. 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
	PIK3R2	NM_005027.4	MANE Select	c.1736+12C>G		intron	N/A	NP_005018.2
	PIK3R2	NR_073517.2		n.2340+12C>G		intron	N/A
	PIK3R2	NR_162071.1		n.2074+12C>G		intron	N/A

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PIK3R2	ENST00000222254.13	TSL:1 MANE Select	c.1736+12C>G		intron	N/A	ENSP00000222254.6
	ENSG00000268173	ENST00000593731.1	TSL:2	n.1736+12C>G		intron	N/A	ENSP00000471914.1
	PIK3R2	ENST00000617130.6	TSL:1	n.*764+12C>G		intron	N/A	ENSP00000477864.2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	3.2
DANN	Benign	0.35
PhyloP100		1.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

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: rs112411913; hg19: chr19-18278128;