Variant 1-226735642-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4_ModerateBS2_Supporting

The NM_002221.4(ITPKB):c.1817C>T(p.Thr606Met) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000323 in 1,611,814 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000014 ( 0 hom. )

Consequence

ITPKB
NM_002221.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 8.12

Variant links:

Genes affected

ITPKB (HGNC:6179): (inositol-trisphosphate 3-kinase B) The protein encoded by this protein regulates inositol phosphate metabolism by phosphorylation of second messenger inositol 1,4,5-trisphosphate to Ins(1,3,4,5)P4. The activity of this encoded protein is responsible for regulating the levels of a large number of inositol polyphosphates that are important in cellular signaling. Both calcium/calmodulin and protein phosphorylation mechanisms control its activity. [provided by RefSeq, Jul 2008]

ITPKB links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.22712308).

BS2

High AC in GnomAd4 at 31 AD gene. Variant has AC lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ITPKB	NM_002221.4 link	c.1817C>T	p.Thr606Met	missense_variant	2/8	ENST00000429204.6	NP_002212.3	P27987-1B2R9J0
ITPKB	NM_001388404.1 link	c.1817C>T	p.Thr606Met	missense_variant	2/3		NP_001375333.1
ITPKB	XM_017001211.3 link	c.1817C>T	p.Thr606Met	missense_variant	2/3		XP_016856700.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
ITPKB	ENST00000429204.6 link	c.1817C>T	p.Thr606Met	missense_variant	2/8	5	NM_002221.4	ENSP00000411152.1	P27987-1
ITPKB	ENST00000272117.8 link	c.1817C>T	p.Thr606Met	missense_variant	2/8	1		ENSP00000272117.3	P27987-1
ITPKB	ENST00000366784.1 link	c.1817C>T	p.Thr606Met	missense_variant	2/3	1		ENSP00000355748.1	P27987-2

Frequencies

GnomAD3 genomes

AF:

0.000204

AC:

AN:

152150

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000700

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000200

AC:

AN:

249616

Hom.:

AF XY:

0.00000741

AC XY:

AN XY:

134962

show subpopulations

Gnomad AFR exome

AF:

0.000308

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000144

AC:

AN:

1459664

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

726062

show subpopulations

Gnomad4 AFR exome

AF:

0.000359

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:

0.00000810

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.000204

AC:

AN:

152150

Hom.:

Cov.:

AF XY:

0.000242

AC XY:

AN XY:

74334

show subpopulations

Gnomad4 AFR

AF:

0.000700

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000290

Hom.:

Bravo

AF:

0.000272

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 22, 2021

The c.1817C>T (p.T606M) alteration is located in exon 2 (coding exon 1) of the ITPKB gene. This alteration results from a C to T substitution at nucleotide position 1817, causing the threonine (T) at amino acid position 606 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

Benign

0.26

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.26

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.60

D;D;.

Eigen

Pathogenic

0.72

Eigen_PC

Pathogenic

0.77

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.93

.;D;D

M_CAP

Benign

0.016

MetaRNN

Benign

0.23

T;T;T

MetaSVM

Benign

-0.97

MutationAssessor

Benign

1.9

L;L;L

PrimateAI

Uncertain

0.75

PROVEAN

Uncertain

-2.6

D;D;D

REVEL

Benign

0.24

Sift

Uncertain

0.0090

D;D;D

Sift4G

Benign

0.14

T;T;D

Polyphen

1.0

D;D;.

Vest4

0.38

MVP

0.48

MPC

1.8

ClinPred

0.63

GERP RS

5.7

Varity_R

0.17

gMVP

0.40

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over