chr8-42317653-G-A

Variant names:

• chr8-42317653-G-A
• rs201394549
• NM_001556.3:c.1126-4G>A

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_Moderate BP6_Moderate BS1

The NM_001556.3(IKBKB):​c.1126-4G>A variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000261 in 1,579,440 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.00016 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00027 (0 hom.)
• Consequence: IKBKB NM_001556.3 splice_region, intron
• Scores: Splicing: ADA: 0.0006603
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 1.16
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• severe combined immunodeficiency due to IKK2 deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, ClinGen, Ambry Genetics
• immunodeficiency 15a

  Inheritance: AR, AD Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Benign. The variant received -8 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.36).
• BP6: Variant 8-42317653-G-A is Benign according to our data. Variant chr8-42317653-G-A is described in ClinVar as Likely_benign. ClinVar VariationId is 541649.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000164 (25/152132) while in subpopulation NFE AF = 0.000323 (22/68040). AF 95% confidence interval is 0.000218. There are 0 homozygotes in GnomAd4. There are 8 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001556.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IKBKB	NM_001556.3	MANE Select	c.1126-4G>A		splice_region intron	N/A	NP_001547.1
	IKBKB	NM_001242778.2		c.949-4G>A		splice_region intron	N/A	NP_001229707.1
	IKBKB	NM_001190720.3		c.934-4G>A		splice_region intron	N/A	NP_001177649.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IKBKB	ENST00000520810.6	TSL:1 MANE Select	c.1126-4G>A		splice_region intron	N/A	ENSP00000430684.1
	IKBKB	ENST00000523517.5	TSL:1	n.1126-57G>A		intron	N/A	ENSP00000430114.1
	IKBKB	ENST00000520835.7	TSL:2	c.934-4G>A		splice_region intron	N/A	ENSP00000430868.2

Frequencies

GnomAD3 genomes AF: 0.000164 AC: 25 AN: 152132 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000724

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: 0.000323

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.000175 AC: 44 AN: 251432 AF XY: 0.000191

Gnomad AFR exome AF: 0.000246

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000325

Gnomad OTH exome AF: 0.000326

GnomAD4 exome AF: 0.000272 AC: 388 AN: 1427308 Hom.: 0 Cov.: 26 AF XY: 0.000246 AC XY: 175 AN XY: 712524

African (AFR) AF: 0.000122 AC: 4 AN: 32814

American (AMR) AF: 0.0000224 AC: 1 AN: 44686

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25938

East Asian (EAS) AF: 0.00 AC: 0 AN: 39498

South Asian (SAS) AF: 0.00 AC: 0 AN: 85586

European-Finnish (FIN) AF: 0.0000374 AC: 2 AN: 53408

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5684

European-Non Finnish (NFE) AF: 0.000334 AC: 361 AN: 1080500

Other (OTH) AF: 0.000338 AC: 20 AN: 59194

GnomAD4 genome AF: 0.000164 AC: 25 AN: 152132 Hom.: 0 Cov.: 32 AF XY: 0.000108 AC XY: 8 AN XY: 74292

African (AFR) AF: 0.0000724 AC: 3 AN: 41422

American (AMR) AF: 0.00 AC: 0 AN: 15272

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3466

East Asian (EAS) AF: 0.00 AC: 0 AN: 5198

South Asian (SAS) AF: 0.00 AC: 0 AN: 4816

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10602

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.000323 AC: 22 AN: 68040

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.000254 Hom.: 0

Bravo AF: 0.000155

EpiCase AF: 0.000327

EpiControl AF: 0.000119

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Severe combined immunodeficiency due to IKK2 deficiency Benign:1

Jan 13, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.36
CADD	Benign	14
DANN	Benign	0.79
PhyloP100		1.2

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.00066
dbscSNV1_RF	Benign	0.0040
SpliceAI score (max)		0.010		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: rs201394549; hg19: chr8-42175171;