Genetic Variant NM_001556.3:c.-24C>G (chr8-42271464-C-G) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4_ModerateBS1_Supporting

The NM_001556.3(IKBKB):c.-24C>G variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000199 in 1,303,922 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 (no stars).

Frequency

Genomes: 𝑓 0.000072 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000013 ( 0 hom. )

Consequence

IKBKB
NM_001556.3 5_prime_UTR

Scores

Clinical Significance

Uncertain significance no assertion criteria provided U:1

Conservation

PhyloP100: -0.116

Variant links:

Genes affected

IKBKB (HGNC:5960): (inhibitor of nuclear factor kappa B kinase subunit beta) The protein encoded by this gene phosphorylates the inhibitor in the inhibitor/NF-kappa-B complex, causing dissociation of the inhibitor and activation of NF-kappa-B. The encoded protein itself is found in a complex of proteins. Several transcript variants, some protein-coding and some not, have been found for this gene. [provided by RefSeq, Sep 2011]

IKBKB links:

IKBKB-DT (HGNC:55254): (IKBKB divergent transcript)

IKBKB-DT 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=0.16529173).

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0000723 (11/152120) while in subpopulation AFR AF= 0.000265 (11/41444). AF 95% confidence interval is 0.000149. There are 0 homozygotes in gnomad4. There are 5 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IKBKB	NM_001556.3 link	c.-24C>G		5_prime_UTR_variant	Exon 1 of 22	ENST00000520810.6	NP_001547.1	O14920-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IKBKB	ENST00000520810 link	c.-24C>G		5_prime_UTR_variant	Exon 1 of 22	1	NM_001556.3	ENSP00000430684.1		O14920-1

Frequencies

GnomAD3 genomes

AF:

0.0000723

AC:

AN:

152120

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000265

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000276

AC:

AN:

108842

Hom.:

AF XY:

0.0000336

AC XY:

AN XY:

59516

show subpopulations

Gnomad AFR exome

AF:

0.000470

Gnomad AMR exome

AF:

0.0000436

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:

0.0000130

AC:

AN:

1151802

Hom.:

Cov.:

AF XY:

0.0000122

AC XY:

AN XY:

576124

show subpopulations

Gnomad4 AFR exome

AF:

0.000419

Gnomad4 AMR exome

AF:

0.0000293

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:

0.00000114

Gnomad4 OTH exome

AF:

0.0000400

GnomAD4 genome

AF:

0.0000723

AC:

AN:

152120

Hom.:

Cov.:

AF XY:

0.0000673

AC XY:

AN XY:

74312

show subpopulations

Gnomad4 AFR

AF:

0.000265

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000982

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

IKBKB-related disorder

Uncertain:1

Oct 20, 2023

PreventionGenetics, part of Exact Sciences

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

The IKBKB c.94C>G variant is predicted to result in the amino acid substitution p.Arg32Gly. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.031% of alleles in individuals of African descent in gnomAD (http://gnomad.broadinstitute.org/variant/8-42128982-C-G). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.60

CADD

Benign

DANN

Benign

0.89

Eigen

Benign

-0.86

Eigen_PC

Benign

-0.86

FATHMM_MKL

Benign

0.32

LIST_S2

Benign

0.25

M_CAP

Pathogenic

0.87

MetaRNN

Benign

0.17

MetaSVM

Benign

-0.94

PROVEAN

Benign

0.59

REVEL

Benign

0.059

Sift

Benign

0.23

Sift4G

Benign

0.15

Polyphen

0.043

Vest4

0.11

MutPred

0.52

Loss of catalytic residue at R32 (P = 0.0362);

MVP

0.39

ClinPred

0.066

GERP RS

1.4

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