NM_005026.5:c.236_237delAG

Variant names:

• chr1-9715634-CAG-C
• rs1553168726
• NM_005026.5:c.236_237delAG

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PVS1 PM2

The NM_005026.5(PIK3CD):​c.236_237delAG​(p.Gln79ProfsTer12) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. Q79Q) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay. The gene PIK3CD is included in the ClinGen Criteria Specification Registry.

• Frequency: Genomes: not found (cov: 33)
• Consequence: PIK3CD NM_005026.5 frameshift
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.66
• Publications: 0 publications found

Genes affected

PIK3CD (HGNC:8977): (phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit delta) Phosphoinositide 3-kinases (PI3Ks) phosphorylate inositol lipids and are involved in the immune response. The protein encoded by this gene is a class I PI3K found primarily in leukocytes. Like other class I PI3Ks (p110-alpha p110-beta, and p110-gamma), the encoded protein binds p85 adapter proteins and GTP-bound RAS. However, unlike the other class I PI3Ks, this protein phosphorylates itself, not p85 protein.[provided by RefSeq, Jul 2010]

PIK3CD Gene-Disease associations (from GenCC):

• immunodeficiency 14

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), Ambry Genetics
• immunodeficiency 14b, autosomal recessive

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

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Specifications for PIK3CD are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005026.5. 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
	PIK3CD	NM_005026.5	MANE Select	c.236_237delAG	p.Gln79ProfsTer12	frameshift	Exon 4 of 24	NP_005017.3
	PIK3CD	NM_001437546.1		c.236_237delAG	p.Gln79ProfsTer12	frameshift	Exon 3 of 23	NP_001424475.1	A0A2K8FKV1
	PIK3CD	NM_001350234.2		c.236_237delAG	p.Gln79ProfsTer12	frameshift	Exon 4 of 24	NP_001337163.1	B7ZM44

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PIK3CD	ENST00000377346.9	TSL:1 MANE Select	c.236_237delAG	p.Gln79ProfsTer12	frameshift	Exon 4 of 24	ENSP00000366563.4	O00329-1
	PIK3CD	ENST00000361110.6	TSL:1	c.236_237delAG	p.Gln79ProfsTer12	frameshift	Exon 3 of 23	ENSP00000354410.2	F8W9P4
	PIK3CD	ENST00000892288.1		c.236_237delAG	p.Gln79ProfsTer12	frameshift	Exon 4 of 24	ENSP00000562347.1

Frequencies

GnomAD3 genomes Cov.: 33

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

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Immunodeficiency 14 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		4.7

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs1553168726; hg19: chr1-9775692;