4-25256610-A-T

Position:

• chr4-25256610-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_018323.4(PI4K2B):​c.692A>T​(p.Lys231Met) variant causes a missense change. The variant allele was found at a frequency of 0.0000103 in 1,461,710 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.000010 (0 hom.)
• Consequence: PI4K2B NM_018323.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.44

Genes affected

PI4K2B (HGNC:18215): (phosphatidylinositol 4-kinase type 2 beta) This gene encodes a member of the type II PI4 kinase protein family. The encoded protein is primarily cytosolic and contributes to overall PI4-kinase activity along with other protein family members. This protein is involved in early T cell activation. [provided by RefSeq, Dec 2016]

PI4K2B (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PI4K2B	NM_018323.4	c.692A>T	p.Lys231Met	missense_variant	4/10	ENST00000264864.8	NP_060793.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PI4K2B	ENST00000264864.8	c.692A>T	p.Lys231Met	missense_variant	4/10	1	NM_018323.4	ENSP00000264864.6
PI4K2B	ENST00000512921.4	c.404A>T	p.Lys135Met	missense_variant	4/10	2		ENSP00000423373.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.0000103 AC: 15 AN: 1461710 Hom.: 0 Cov.: 30 AF XY: 0.0000124 AC XY: 9 AN XY: 727160

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000135

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

Alfa AF: 0.0000312 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 26, 2024

The c.692A>T (p.K231M) alteration is located in exon 4 (coding exon 4) of the PI4K2B gene. This alteration results from a A to T substitution at nucleotide position 692, causing the lysine (K) at amino acid position 231 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.37
BayesDel_addAF	Uncertain	0.097	D
BayesDel_noAF	Benign	-0.10
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.31	.;T
Eigen	Pathogenic	0.72
Eigen_PC	Uncertain	0.65
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Benign	0.84	T;T
M_CAP	Benign	0.059	D
MetaRNN	Uncertain	0.72	D;D
MetaSVM	Uncertain	-0.26	T
MutationAssessor	Pathogenic	3.3	.;M
PrimateAI	Uncertain	0.60	T
PROVEAN	Uncertain	-4.1	D;D
REVEL	Uncertain	0.40
Sift	Uncertain	0.0060	D;D
Sift4G	Uncertain	0.013	D;D
Polyphen		1.0	.;D
Vest4		0.63
MutPred		0.51		.;Gain of glycosylation at S227 (P = 0.0099);
MVP		0.72
MPC		0.85
ClinPred		0.99	D
GERP RS		4.8
Varity_R		0.48
gMVP		0.78

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

Publications

LitVar

Other links and lift over

dbSNP: rs1716271626; hg19: chr4-25258232;