1-153810257-A-C

Position:

• chr1-153810257-A-C

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 3P and 4B. PM2 PP2 BP4_Strong

The NM_020699.4(GATAD2B):​c.1702T>G​(p.Leu568Val) 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 (★). Synonymous variant affecting the same amino acid position (i.e. L568L) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: GATAD2B NM_020699.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.241

Genes affected

GATAD2B (HGNC:30778): (GATA zinc finger domain containing 2B) This gene encodes a zinc finger protein transcriptional repressor. The encoded protein is part of the methyl-CpG-binding protein-1 complex, which represses gene expression by deacetylating methylated nucleosomes. Mutations in this gene are linked to intellectual disability and dysmorphic features associated with cognitive disability. [provided by RefSeq, Jun 2016]

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), GATAD2B. . Gene score misZ 3.161 (greater than the threshold 3.09). Trascript score misZ 3.9812 (greater than threshold 3.09). GenCC has associacion of gene with severe intellectual disability-poor language-strabismus-grimacing face-long fingers syndrome.
• BP4: Computational evidence support a benign effect (MetaRNN=0.024716198).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GATAD2B	NM_020699.4	c.1702T>G	p.Leu568Val	missense_variant	11/11	ENST00000368655.5
GATAD2B	XM_047426115.1	c.1705T>G	p.Leu569Val	missense_variant	11/11
GATAD2B	XM_047426117.1	c.1702T>G	p.Leu568Val	missense_variant	11/11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GATAD2B	ENST00000368655.5	c.1702T>G	p.Leu568Val	missense_variant	11/11	1	NM_020699.4	P1
GATAD2B	ENST00000634544.1	c.1702T>G	p.Leu568Val	missense_variant	11/11	5		P1
GATAD2B	ENST00000634408.1	c.1654T>G	p.Leu552Val	missense_variant	11/11	5
GATAD2B	ENST00000637918.1	c.135+1474T>G		intron_variant		5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000403 AC: 1 AN: 248148 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 134376

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

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: 0.00000898

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 08, 2023

This sequence change replaces leucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 568 of the GATAD2B protein (p.Leu568Val). This variant is present in population databases (no rsID available, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with GATAD2B-related conditions. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt GATAD2B protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.48
CADD	Benign	14
DANN	Uncertain	0.99
DEOGEN2	Benign	0.016	T;T;.
Eigen	Benign	-0.74
Eigen_PC	Benign	-0.65
FATHMM_MKL	Benign	0.42	N
LIST_S2	Uncertain	0.88	.;.;D
M_CAP	Benign	0.0069	T
MetaRNN	Benign	0.025	T;T;T
MetaSVM	Benign	-0.97	T
MutationAssessor	Uncertain	2.1	M;M;.
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.63	T
PROVEAN	Benign	0.22	N;.;.
REVEL	Benign	0.065
Sift	Benign	1.0	T;.;.
Sift4G	Benign	1.0	T;T;T
Polyphen		0.13	B;B;.
Vest4		0.12
MutPred		0.11		Gain of methylation at K564 (P = 0.1464);Gain of methylation at K564 (P = 0.1464);.;
MVP		0.39
MPC		1.4
ClinPred		0.13	T
GERP RS		0.068
Varity_R		0.032
gMVP		0.64

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

Other links and lift over

dbSNP: rs1215780997; hg19: chr1-153782733;