1-244053876-C-G

Variant names:

• chr1-244053876-C-G
• NM_205768.3:c.102C>G

Variant summary

Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM1 PM2 PP2 PP3_Strong

The NM_205768.3(ZBTB18):​c.102C>G​(p.Asp34Glu) 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 pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ZBTB18 NM_205768.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.77

Genes affected

ZBTB18 (HGNC:13030): (zinc finger and BTB domain containing 18) This gene encodes a C2H2-type zinc finger protein which acts a transcriptional repressor of genes involved in neuronal development. The encoded protein recognizes a specific sequence motif and recruits components of chromatin to target genes. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2013]

ACMG classification

Verdict is Likely_pathogenic. Variant got 9 ACMG points.

• PM1: In a domain BTB (size 67) in uniprot entity ZBT18_HUMAN there are 4 pathogenic changes around while only 1 benign (80%) in NM_205768.3
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the ZBTB18 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 26 curated pathogenic missense variants (we use a threshold of 10). The gene has 19 curated benign missense variants. Gene score misZ: 3.4305 (above the threshold of 3.09). Trascript score misZ: 4.2468 (above the threshold of 3.09). GenCC associations: The gene is linked to intellectual disability, autosomal dominant 22, complex neurodevelopmental disorder.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.967

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ZBTB18	NM_205768.3	c.102C>G	p.Asp34Glu	missense_variant	Exon 2 of 2	ENST00000358704.4	NP_991331.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ZBTB18	ENST00000358704.4	c.102C>G	p.Asp34Glu	missense_variant	Exon 2 of 2	1	NM_205768.3	ENSP00000351539.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Nov 25, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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 expected to disrupt ZBTB18 protein function. This variant has not been reported in the literature in individuals affected with ZBTB18-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces aspartic acid, which is acidic and polar, with glutamic acid, which is acidic and polar, at codon 34 of the ZBTB18 protein (p.Asp34Glu). 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	Pathogenic	0.88
BayesDel_addAF	Pathogenic	0.47	D
BayesDel_noAF	Pathogenic	0.43
CADD	Pathogenic	32
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.93	D;.
Eigen	Pathogenic	0.82
Eigen_PC	Pathogenic	0.71
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Pathogenic	1.0	D;D
M_CAP	Pathogenic	0.55	D
MetaRNN	Pathogenic	0.97	D;D
MetaSVM	Pathogenic	0.97	D
MutationAssessor	Pathogenic	4.0	H;.
PrimateAI	Pathogenic	0.91	D
PROVEAN	Uncertain	-3.3	.;D
REVEL	Pathogenic	0.86
Sift	Pathogenic	0.0	.;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		0.99	D;D
Vest4		0.96
MutPred		0.86		Loss of sheet (P = 0.302);.;
MVP		0.97
MPC		1.9
ClinPred		1.0	D
GERP RS		4.3
Varity_R		0.32
gMVP		0.99

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		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: chr1-244217178;