NM_001387220.1:c.406+2268C>G

Variant names:

• chr2-213054565-G-C
• rs9288462
• NM_001387220.1:c.406+2268C>G

Variant summary

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

The NM_001387220.1(IKZF2):​c.406+2268C>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000132 in 151,958 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: 𝑓 0.000013 (0 hom., cov: 33)
• Consequence: IKZF2 NM_001387220.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0680
• Publications: 3 publications found

Genes affected

IKZF2 (HGNC:13177): (IKAROS family zinc finger 2) This gene encodes a member of the Ikaros family of zinc-finger proteins. Three members of this protein family (Ikaros, Aiolos and Helios) are hematopoietic-specific transcription factors involved in the regulation of lymphocyte development. This protein forms homo- or hetero-dimers with other Ikaros family members, and is thought to function predominantly in early hematopoietic development. Multiple transcript variants encoding different isoforms have been found for this gene, but the biological validity of some variants has not been determined. [provided by RefSeq, Jul 2008]

IKZF2 Gene-Disease associations (from GenCC):

• HELIOS deficiency

  Inheritance: SD, AR Classification: MODERATE, LIMITED Submitted by: ClinGen, Ambry Genetics
• hearing loss disorder

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• immunodeficiency disease

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

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=-0.92).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001387220.1. 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
	IKZF2	NM_001387220.1	MANE Select	c.406+2268C>G		intron	N/A	NP_001374149.1
	IKZF2	NM_001371274.1		c.406+2268C>G		intron	N/A	NP_001358203.1
	IKZF2	NM_016260.3		c.406+2268C>G		intron	N/A	NP_057344.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IKZF2	ENST00000434687.6	TSL:5 MANE Select	c.406+2268C>G		intron	N/A	ENSP00000412869.1
	IKZF2	ENST00000342002.6	TSL:1	c.424+2268C>G		intron	N/A	ENSP00000342876.2
	IKZF2	ENST00000374319.8	TSL:1	c.328+2346C>G		intron	N/A	ENSP00000363439.4

Frequencies

GnomAD3 genomes AF: 0.0000132 AC: 2 AN: 151958 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000242

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: 0.0000147

Gnomad OTH AF: 0.00

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.0000132 AC: 2 AN: 151958 Hom.: 0 Cov.: 33 AF XY: 0.0000270 AC XY: 2 AN XY: 74208

African (AFR) AF: 0.0000242 AC: 1 AN: 41370

American (AMR) AF: 0.00 AC: 0 AN: 15242

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5180

South Asian (SAS) AF: 0.00 AC: 0 AN: 4832

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10590

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

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 67962

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

Alfa AF: 0.00 Hom.: 5454

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
CADD	Benign	1.3
DANN	Benign	0.17
PhyloP100		0.068

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: rs9288462; hg19: chr2-213919289;