chr17-39766038-G-A

Position:

• chr17-39766038-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_012481.5(IKZF3):​c.1282C>T​(p.Leu428Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: IKZF3 NM_012481.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.00

Genes affected

IKZF3 (HGNC:13178): (IKAROS family zinc finger 3) 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 gene product is a transcription factor that is important in the regulation of B lymphocyte proliferation and differentiation. Both Ikaros and Aiolos can participate in chromatin remodeling. Regulation of gene expression in B lymphocytes by Aiolos is complex as it appears to require the sequential formation of Ikaros homodimers, Ikaros/Aiolos heterodimers, and Aiolos homodimers. Several alternative transcripts encoding different isoforms have been described, as well as some non-protein coding variants. [provided by RefSeq, Apr 2012]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.10067201).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
IKZF3	NM_012481.5	c.1282C>T	p.Leu428Phe	missense_variant	8/8	ENST00000346872.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
IKZF3	ENST00000346872.8	c.1282C>T	p.Leu428Phe	missense_variant	8/8	1	NM_012481.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 25, 2023

The c.1282C>T (p.L428F) alteration is located in exon 8 (coding exon 8) of the IKZF3 gene. This alteration results from a C to T substitution at nucleotide position 1282, causing the leucine (L) at amino acid position 428 to be replaced by a phenylalanine (F). 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	0.25
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.54
CADD	Benign	18
DANN	Uncertain	0.99
Eigen	Benign	-0.29
Eigen_PC	Benign	-0.14
FATHMM_MKL	Benign	0.71	D
LIST_S2	Benign	0.76	T;T;T;T;T;T;T;T;T;.;T;T;T;T;T
M_CAP	Benign	0.0053	T
MetaRNN	Benign	0.10	T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.2	M;.;.;.;.;.;.;.;.;.;.;.;.;.;.
MutationTaster	Benign	0.71	N;N;N;N;N;N;N;N;N;N;N;N;N;N
PrimateAI	Benign	0.39	T
PROVEAN	Benign	-2.2	.;.;.;N;N;N;N;N;N;.;N;N;N;N;.
REVEL	Benign	0.067
Sift	Benign	0.031	.;.;.;D;T;D;D;T;T;.;T;D;T;D;.
Sift4G	Benign	0.24	T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
Polyphen		0.0020	B;.;B;B;B;B;B;B;B;.;B;B;B;B;B
Vest4		0.085
MutPred		0.24		Loss of disorder (P = 0.0878);.;.;.;.;.;.;.;.;.;.;.;.;.;.;
MVP		0.24
MPC		0.66
ClinPred		0.47	T
GERP RS		3.8
Varity_R		0.13
gMVP		0.096

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr17-37922291;