22-20709384-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_058004.4(PI4KA):c.6174-5C>T variant causes a splice region, splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. 2/2 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.32 (5898 hom., cov: 20)
  • Exomes 𝑓: 0.087 (30130 hom.)
  • Failed GnomAD Quality Control
• Consequence: PI4KA NM_058004.4 splice_region, splice_polypyrimidine_tract, intron
• Scores: Splicing: ADA: 0.00001908
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: 0.343

Genes affected

PI4KA (HGNC:8983): (phosphatidylinositol 4-kinase alpha) This gene encodes a phosphatidylinositol (PI) 4-kinase which catalyzes the first committed step in the biosynthesis of phosphatidylinositol 4,5-bisphosphate. The mammalian PI 4-kinases have been classified into two types, II and III, based on their molecular mass, and modulation by detergent and adenosine. The protein encoded by this gene is a type III enzyme that is not inhibited by adenosine. Alternative splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Apr 2018]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.9).
• BP6: Variant 22-20709384-G-A is Benign according to our data. Variant chr22-20709384-G-A is described in ClinVar as [Benign]. Clinvar id is 769146.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.376 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PI4KA	NM_058004.4	c.6174-5C>T		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		ENST00000255882.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PI4KA	ENST00000255882.11	c.6174-5C>T		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		1	NM_058004.4	P1

Frequencies

GnomAD3 genomes AF: 0.324 AC: 30661 AN: 94714 Hom.: 5885 Cov.: 20

Gnomad AFR AF: 0.382

Gnomad AMI AF: 0.395

Gnomad AMR AF: 0.361

Gnomad ASJ AF: 0.357

Gnomad EAS AF: 0.352

Gnomad SAS AF: 0.230

Gnomad FIN AF: 0.161

Gnomad MID AF: 0.313

Gnomad NFE AF: 0.317

Gnomad OTH AF: 0.337

GnomAD3 exomes AF: 0.0869 AC: 15500 AN: 178280 Hom.: 5924 AF XY: 0.0789 AC XY: 7692 AN XY: 97530

Gnomad AFR exome AF: 0.214

Gnomad AMR exome AF: 0.164

Gnomad ASJ exome AF: 0.0542

Gnomad EAS exome AF: 0.194

Gnomad SAS exome AF: 0.0540

Gnomad FIN exome AF: 0.00515

Gnomad NFE exome AF: 0.0655

Gnomad OTH exome AF: 0.129

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 0.0871 AC: 90245 AN: 1036382 Hom.: 30130 Cov.: 24 AF XY: 0.0904 AC XY: 46643 AN XY: 516052

Gnomad4 AFR exome AF: 0.177

Gnomad4 AMR exome AF: 0.211

Gnomad4 ASJ exome AF: 0.174

Gnomad4 EAS exome AF: 0.304

Gnomad4 SAS exome AF: 0.134

Gnomad4 FIN exome AF: 0.0766

Gnomad4 NFE exome AF: 0.0668

Gnomad4 OTH exome AF: 0.129

GnomAD4 genome AF: 0.324 AC: 30704 AN: 94804 Hom.: 5898 Cov.: 20 AF XY: 0.311 AC XY: 14281 AN XY: 45958

Gnomad4 AFR AF: 0.383

Gnomad4 AMR AF: 0.362

Gnomad4 ASJ AF: 0.357

Gnomad4 EAS AF: 0.352

Gnomad4 SAS AF: 0.232

Gnomad4 FIN AF: 0.161

Gnomad4 NFE AF: 0.317

Gnomad4 OTH AF: 0.336

Alfa AF: 0.250 Hom.: 675

ClinVar

Significance: Benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:2

Benign, criteria provided, single submitter	clinical testing	Invitae	Jan 12, 2018	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Jul 09, 2018	- -

Polymicrogyria, perisylvian, with cerebellar hypoplasia and arthrogryposis Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Sep 05, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.90
Cadd	Benign	3.1
Dann	Benign	0.75

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000019
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: rs426917; hg19: chr22-21063672; COSMIC: COSV55405412; COSMIC: COSV55405412;