rs1555442889

Positions:

• chr15-92979191-GGCCAAAAAGAAGATGGT-GTG

Variant summary

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

The NM_001271.4(CHD2):​c.2785_2801delinsTG​(p.Ala929_Val934delinsTer) variant causes a stop gained change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 31)
• Consequence: CHD2 NM_001271.4 stop_gained
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 9.89

Genes affected

CHD2 (HGNC:1917): (chromodomain helicase DNA binding protein 2) The CHD family of proteins is characterized by the presence of chromo (chromatin organization modifier) domains and SNF2-related helicase/ATPase domains. CHD genes alter gene expression possibly by modification of chromatin structure thus altering access of the transcriptional apparatus to its chromosomal DNA template. Alternatively spliced transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 15-92979192-GCCAAAAAGAAGATGGT-TG is Pathogenic according to our data. Variant chr15-92979192-GCCAAAAAGAAGATGGT-TG is described in ClinVar as [Pathogenic]. Clinvar id is 541361.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CHD2	NM_001271.4	c.2785_2801delinsTG	p.Ala929_Val934delinsTer	stop_gained	22/39	ENST00000394196.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHD2	ENST00000394196.9	c.2785_2801delinsTG	p.Ala929_Val934delinsTer	stop_gained	22/39	5	NM_001271.4	P1

Frequencies

GnomAD3 genomes Cov.: 31

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

GnomAD4 genome Cov.: 31

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Developmental and epileptic encephalopathy 94 Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

Aug 21, 2017

For these reasons, this variant has been classified as Pathogenic. Loss-of-function variants in CHD2 are known to be pathogenic (PMID: 23708187, 24207121). This variant has not been reported in the literature in individuals with CHD2-related disease. This variant is not present in population databases (ExAC no frequency). This sequence change creates a premature translational stop signal (p.Ala929*) in the CHD2 gene. It is expected to result in an absent or disrupted protein product. -

Computational scores

Source: dbNSFP v4.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1555442889; hg19: chr15-93522422;