1-244054357-C-T

Position:

• chr1-244054357-C-T

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_205768.3(ZBTB18):​c.583C>T​(p.Arg195Ter) variant causes a stop gained 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 Pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ZBTB18 NM_205768.3 stop_gained
• Clinical Significance: Pathogenic criteria provided, single submitter P:4 O:1
• Conservation: PhyloP100: 1.88

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 Pathogenic. Variant got 12 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 47 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 1-244054357-C-T is Pathogenic according to our data. Variant chr1-244054357-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 417741.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr1-244054357-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ZBTB18	NM_205768.3	c.583C>T	p.Arg195Ter	stop_gained	2/2	ENST00000358704.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ZBTB18	ENST00000358704.4	c.583C>T	p.Arg195Ter	stop_gained	2/2	1	NM_205768.3	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4 Other:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Pathogenic:2

Pathogenic, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Pathogenic, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -

Intellectual disability, autosomal dominant 22 Pathogenic:1 Other:1

not provided, no classification provided	phenotyping only	GenomeConnect - Brain Gene Registry	-	Variant classified as Likely pathogenic and reported on 04-29-2016 by GeneDx. Assertions are reported exactly as they appear on the patient provided laboratory report. GenomeConnect does not attempt to reinterpret the variant. The IDDRC-CTSA National Brain Gene Registry (BGR) is a study funded by the U.S. National Center for Advancing Translational Sciences (NCATS) and includes 13 Intellectual and Developmental Disability Research Center (IDDRC) institutions. The study is led by Principal Investigator Dr. Philip Payne from Washington University. The BGR is a data commons of gene variants paired with subject clinical information. This database helps scientists learn more about genetic changes and their impact on the brain and behavior. Participation in the Brain Gene Registry requires participation in GenomeConnect. More information about the Brain Gene Registry can be found on the study website - https://braingeneregistry.wustl.edu/. -
Pathogenic, no assertion criteria provided	literature only	OMIM	Apr 05, 2022	- -

Inborn genetic diseases Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Ambry Genetics

May 03, 2021

The c.583C>T (p.R195*) alteration, located in exon 2 (coding exon 2) of the ZBTB18 gene, consists of a C to T substitution at nucleotide position 583. This changes the amino acid from an arginine (R) to a stop codon at amino acid position 195. This alteration occurs at the 3' terminus of the ZBTB18 gene and is not expected to trigger nonsense-mediated mRNA decay; however, premature stop codons are typically deleterious in nature. This alteration and other downstream truncations have been reported as disease causing (Lopes, 2016; Depienne, 2017; DDD Study, 2017). Based on data from the Genome Aggregation Database (gnomAD), the ZBTB18 c.583C>T alteration was not observed, with coverage at this position. This alteration was reported in a 5 year old girl with developmental regression at 8 months, severe intellectual disability, nonverbal, hand stereotypies, intense eye communication, breathing disturbances, screaming spells, and microcephaly (Lopes, 2016). Based on the available evidence, this alteration is classified as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.58
CADD	Pathogenic	37
DANN	Uncertain	1.0
Eigen	Pathogenic	0.87
Eigen_PC	Pathogenic	0.72
FATHMM_MKL	Uncertain	0.85	D
MutationTaster	Benign	1.0	D
Vest4		0.54
GERP RS		4.3

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: rs1064792999; hg19: chr1-244217659; COSMIC: COSV62396102;