rs3730091

chr5-68293728-A-Cchr5-68293728-A-Gchr5-68293728-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP2

The NM_181523.3(PIK3R1):c.1319A>C(p.Asp440Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D440G) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PIK3R1 NM_181523.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 8.95

Genes affected

PIK3R1 (HGNC:8979): (phosphoinositide-3-kinase regulatory subunit 1) Phosphatidylinositol 3-kinase phosphorylates the inositol ring of phosphatidylinositol at the 3-prime position. The enzyme comprises a 110 kD catalytic subunit and a regulatory subunit of either 85, 55, or 50 kD. This gene encodes the 85 kD regulatory subunit. Phosphatidylinositol 3-kinase plays an important role in the metabolic actions of insulin, and a mutation in this gene has been associated with insulin resistance. Alternative splicing of this gene results in four transcript variants encoding different isoforms. [provided by RefSeq, Jun 2011]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, PIK3R1

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PIK3R1	NM_181523.3	c.1319A>C	p.Asp440Ala	missense_variant	11/16	ENST00000521381.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PIK3R1	ENST00000521381.6	c.1319A>C	p.Asp440Ala	missense_variant	11/16	1	NM_181523.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 24

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.69
BayesDel_addAF	Pathogenic	0.39	D
BayesDel_noAF	Pathogenic	0.32
Cadd	Pathogenic	28
Dann	Uncertain	0.99
DEOGEN2	Uncertain	0.70	D;D;.;T;.;T;.
Eigen	Uncertain	0.29
Eigen_PC	Uncertain	0.41
FATHMM_MKL	Pathogenic	1.0	D
M_CAP	Uncertain	0.10	D
MetaRNN	Uncertain	0.69	D;D;D;D;D;D;D
MetaSVM	Uncertain	0.021	D
MutationAssessor	Uncertain	2.0	M;M;.;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D;D;D
PrimateAI	Uncertain	0.75	T
PROVEAN	Uncertain	-3.8	D;D;D;D;D;D;D
REVEL	Uncertain	0.58
Sift	Benign	0.043	D;D;T;T;T;T;T
Sift4G	Benign	0.18	T;T;T;T;T;T;T
Polyphen		0.58	P;P;B;.;B;.;.
Vest4		0.68
MutPred		0.40		Loss of ubiquitination at K438 (P = 0.0642);Loss of ubiquitination at K438 (P = 0.0642);.;.;.;.;.;
MVP		0.97
MPC		1.4
ClinPred		0.99	D
GERP RS		5.1
Varity_R		0.70
gMVP		0.85

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: rs3730091; hg19: chr5-67589556;