chr5-68293790-C-G

Variant names:

• chr5-68293790-C-G
• rs1057519838
• NM_181523.3:c.1381C>G

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_181523.3(PIK3R1):​c.1381C>G​(p.Arg461Gly) variant causes a missense 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: 32)
• Consequence: PIK3R1 NM_181523.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.562
• Publications: 0 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: Labcorp Genetics (formerly Invitae), Ambry Genetics
• PIK3R1-related immunodeficiency and SHORT syndrome

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• SHORT syndrome

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

  Inheritance: AR Classification: STRONG, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics, ClinGen
• 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 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3580621).

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PIK3R1	NM_181523.3	MANE Select	c.1381C>G	p.Arg461Gly	missense	Exon 11 of 16	NP_852664.1	A0A2X0SFG1
	PIK3R1	NM_181504.4		c.571C>G	p.Arg191Gly	missense	Exon 5 of 10	NP_852556.2
	PIK3R1	NM_181524.2		c.481C>G	p.Arg161Gly	missense	Exon 5 of 10	NP_852665.1	P27986-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PIK3R1	ENST00000521381.6	TSL:1 MANE Select	c.1381C>G	p.Arg461Gly	missense	Exon 11 of 16	ENSP00000428056.1	P27986-1
	PIK3R1	ENST00000336483.10	TSL:1	c.571C>G	p.Arg191Gly	missense	Exon 5 of 10	ENSP00000338554.5	P27986-2
	PIK3R1	ENST00000320694.13	TSL:1	c.481C>G	p.Arg161Gly	missense	Exon 5 of 10	ENSP00000323512.8	P27986-3

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	Benign	0.24
BayesDel_addAF	Uncertain	0.16	D
BayesDel_noAF	Uncertain	-0.010
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.80	D
Eigen	Benign	-0.33
Eigen_PC	Benign	-0.29
FATHMM_MKL	Uncertain	0.76	D
LIST_S2	Benign	0.71	T
M_CAP	Uncertain	0.14	D
MetaRNN	Benign	0.36	T
MetaSVM	Uncertain	0.17	D
MutationAssessor	Benign	1.8	L
PhyloP100		0.56
PrimateAI	Uncertain	0.69	T
PROVEAN	Pathogenic	-4.9	D
REVEL	Uncertain	0.39
Sift	Uncertain	0.011	D
Sift4G	Uncertain	0.018	D
Polyphen		0.67	P
Vest4		0.15
MutPred		0.37		Gain of sheet (P = 0.0043)
MVP		0.92
MPC		1.7
ClinPred		0.93	D
GERP RS		2.1
Varity_R		0.68
gMVP		0.53
Mutation Taster		=56/44	polymorphism

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: rs1057519838; hg19: chr5-67589618;