rs1020760

Variant names:

• chr4-102593288-C-A
• rs1020760
• NM_003998.4:c.1067-137C>A

Your query was ambiguous. Multiple possible variants found:

• chr4-102593288-C-A
• chr4-102593288-C-G

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_003998.4(NFKB1):​c.1067-137C>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000152 in 658,852 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000015 (0 hom.)
• Consequence: NFKB1 NM_003998.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.05
• Publications: 23 publications found

Genes affected

NFKB1 (HGNC:7794): (nuclear factor kappa B subunit 1) This gene encodes a 105 kD protein which can undergo cotranslational processing by the 26S proteasome to produce a 50 kD protein. The 105 kD protein is a Rel protein-specific transcription inhibitor and the 50 kD protein is a DNA binding subunit of the NF-kappa-B (NFKB) protein complex. NFKB is a transcription regulator that is activated by various intra- and extra-cellular stimuli such as cytokines, oxidant-free radicals, ultraviolet irradiation, and bacterial or viral products. Activated NFKB translocates into the nucleus and stimulates the expression of genes involved in a wide variety of biological functions. Inappropriate activation of NFKB has been associated with a number of inflammatory diseases while persistent inhibition of NFKB leads to inappropriate immune cell development or delayed cell growth. NFKB is a critical regulator of the immediate-early response to viral infection. Alternative splicing results in multiple transcript variants encoding different isoforms, at least one of which is proteolytically processed. [provided by RefSeq, Aug 2020]

NFKB1 Gene-Disease associations (from GenCC):

• immunodeficiency, common variable, 12

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae)
• common variable immunodeficiency

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.65).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NFKB1	NM_003998.4	c.1067-137C>A		intron_variant	Intron 11 of 23	ENST00000226574.9	NP_003989.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NFKB1	ENST00000226574.9	c.1067-137C>A		intron_variant	Intron 11 of 23	1	NM_003998.4	ENSP00000226574.4
NFKB1	ENST00000505458.5	c.1064-137C>A		intron_variant	Intron 11 of 23	1		ENSP00000424790.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000152 AC: 1 AN: 658852 Hom.: 0 Cov.: 9 AF XY: 0.00 AC XY: 0 AN XY: 342948

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 16282

American (AMR) AF: 0.00 AC: 0 AN: 25766

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 14676

East Asian (EAS) AF: 0.00 AC: 0 AN: 34214

South Asian (SAS) AF: 0.00 AC: 0 AN: 48090

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40444

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 2254

European-Non Finnish (NFE) AF: 0.00000225 AC: 1 AN: 444896

Other (OTH) AF: 0.00 AC: 0 AN: 32230

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.65
CADD	Benign	12
DANN	Benign	0.78
PhyloP100		1.0

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

Other links and lift over

dbSNP: rs1020760; hg19: chr4-103514445;