1-9710460-C-T

Variant names:

• chr1-9710460-C-T
• rs1257745660
• NM_005026.5:c.5C>T

Variant summary

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

The NM_005026.5(PIK3CD):​c.5C>T​(p.Pro2Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,848 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P2T) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: PIK3CD NM_005026.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter P:1 U:1
• Conservation: PhyloP100: 3.50
• Publications: 2 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

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=0.2697914).

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.5C>T	p.Pro2Leu	missense	Exon 3 of 24	NP_005017.3
	PIK3CD	NM_001437546.1		c.5C>T	p.Pro2Leu	missense	Exon 2 of 23	NP_001424475.1	A0A2K8FKV1
	PIK3CD	NM_001350234.2		c.5C>T	p.Pro2Leu	missense	Exon 3 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.5C>T	p.Pro2Leu	missense	Exon 3 of 24	ENSP00000366563.4	O00329-1
	PIK3CD	ENST00000361110.6	TSL:1	c.5C>T	p.Pro2Leu	missense	Exon 2 of 23	ENSP00000354410.2	F8W9P4
	PIK3CD	ENST00000892288.1		c.5C>T	p.Pro2Leu	missense	Exon 3 of 24	ENSP00000562347.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251474 AF XY: 0.00000736

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461848 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2 AN XY: 727238

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.0000504 AC: 2 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53406

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111986

Other (OTH) AF: 0.00 AC: 0 AN: 60394

GnomAD4 genome Cov.: 31

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	Activated PI3K-delta syndrome (1)
-	1	-	Immunodeficiency 14 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.32
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.081	T
Eigen	Benign	-0.054
Eigen_PC	Benign	0.058
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.91	D
M_CAP	Benign	0.027	D
MetaRNN	Benign	0.27	T
MetaSVM	Benign	-0.75	T
MutationAssessor	Benign	1.3	L
PhyloP100		3.5
PrimateAI	Uncertain	0.74	T
PROVEAN	Pathogenic	-5.2	D
REVEL	Benign	0.070
Sift	Benign	0.044	D
Sift4G	Uncertain	0.053	T
Polyphen		0.042	B
Vest4		0.22
MutPred		0.32		Loss of disorder (P = 0.0444)
MVP		0.63
MPC		0.97
ClinPred		0.75	D
GERP RS		3.5
PromoterAI		-0.00070	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.11
gMVP		0.87
Mutation Taster		=77/23	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: rs1257745660; hg19: chr1-9770518;