rs754454562

Variant names:

• chr5-68293805-T-A
• rs754454562
• NM_181523.3:c.1396T>A

Your query was ambiguous. Multiple possible variants found:

• chr5-68293805-T-A
• chr5-68293805-T-C
• chr5-68293805-T-G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_181523.3(PIK3R1):​c.1396T>A​(p.Leu466Ile) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. L466L) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PIK3R1 NM_181523.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.75
• Publications: 2 publications found

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]

PIK3R1 Gene-Disease associations (from GenCC):

• immunodeficiency 36 with lymphoproliferation

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), ClinGen
• SHORT syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Orphanet
• agammaglobulinemia 7, autosomal recessive

  Inheritance: AR Classification: STRONG, LIMITED Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• activated PI3K-delta syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• autosomal agammaglobulinemia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_181523.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PIK3R1	NM_181523.3	MANE Select	c.1396T>A	p.Leu466Ile	missense	Exon 11 of 16	NP_852664.1
	PIK3R1	NM_181504.4		c.586T>A	p.Leu196Ile	missense	Exon 5 of 10	NP_852556.2
	PIK3R1	NM_181524.2		c.496T>A	p.Leu166Ile	missense	Exon 5 of 10	NP_852665.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PIK3R1	ENST00000521381.6	TSL:1 MANE Select	c.1396T>A	p.Leu466Ile	missense	Exon 11 of 16	ENSP00000428056.1
	PIK3R1	ENST00000336483.10	TSL:1	c.586T>A	p.Leu196Ile	missense	Exon 5 of 10	ENSP00000338554.5
	PIK3R1	ENST00000320694.13	TSL:1	c.496T>A	p.Leu166Ile	missense	Exon 5 of 10	ENSP00000323512.8

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 27

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.69
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Uncertain	-0.040
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Benign	0.39	T
Eigen	Uncertain	0.62
Eigen_PC	Uncertain	0.58
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Uncertain	0.096	D
MetaRNN	Uncertain	0.56	D
MetaSVM	Uncertain	0.10	D
MutationAssessor	Uncertain	2.7	M
PhyloP100		4.8
PrimateAI	Pathogenic	0.80	T
PROVEAN	Benign	-1.7	N
REVEL	Uncertain	0.35
Sift	Benign	0.033	D
Sift4G	Uncertain	0.048	D
Polyphen		0.93	P
Vest4		0.39
MutPred		0.30		Gain of catalytic residue at L466 (P = 0.0238)
MVP		0.87
MPC		2.1
ClinPred		0.97	D
GERP RS		4.0
Varity_R		0.52
gMVP		0.40
Mutation Taster		=27/73	disease causing

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: rs754454562; hg19: chr5-67589633;