15-92978374-A-C

Position:

• chr15-92978374-A-C

Variant summary

Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM1 PM2 PP2 PP3_Moderate PP5_Moderate

The NM_001271.4(CHD2):​c.2718A>C​(p.Gln906His) 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 Likely pathogenic (★). Synonymous variant affecting the same amino acid position (i.e. Q906Q) has been classified as Benign.

• Frequency: Genomes: not found (cov: 31)
• Consequence: CHD2 NM_001271.4 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 1.64

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 Likely_pathogenic. Variant got 9 ACMG points.

• PM1: In a domain Helicase C-terminal (size 151) in uniprot entity CHD2_HUMAN there are 4 pathogenic changes around while only 0 benign (100%) in NM_001271.4
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), CHD2. . Gene score misZ 5.2052 (greater than the threshold 3.09). Trascript score misZ 6.0204 (greater than threshold 3.09). GenCC has associacion of gene with developmental and epileptic encephalopathy 94, complex neurodevelopmental disorder, myoclonic-astatic epilepsy, Lennox-Gastaut syndrome.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.895
• PP5: Variant 15-92978374-A-C is Pathogenic according to our data. Variant chr15-92978374-A-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 1707908.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CHD2	NM_001271.4	c.2718A>C	p.Gln906His	missense_variant	21/39	ENST00000394196.9	NP_001262.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CHD2	ENST00000394196.9	c.2718A>C	p.Gln906His	missense_variant	21/39	5	NM_001271.4	ENSP00000377747	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 52

GnomAD4 genome Cov.: 31

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Apr 01, 2022

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.41	D
BayesDel_noAF	Pathogenic	0.35
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.91	.;D;.
Eigen	Uncertain	0.65
Eigen_PC	Uncertain	0.51
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Pathogenic	0.99	D;D;D
M_CAP	Pathogenic	0.63	D
MetaRNN	Pathogenic	0.89	D;D;D
MetaSVM	Pathogenic	0.84	D
MutationAssessor	Pathogenic	5.2	H;H;.
MutationTaster	Benign	3.3e-7	P;P
PrimateAI	Pathogenic	0.88	D
PROVEAN	Pathogenic	-4.8	.;D;.
REVEL	Pathogenic	0.79
Sift	Uncertain	0.0010	.;D;.
Sift4G	Uncertain	0.0020	D;D;D
Polyphen		1.0	D;D;.
Vest4		0.89
MutPred		0.55		Loss of MoRF binding (P = 0.1171);Loss of MoRF binding (P = 0.1171);.;
MVP		0.99
MPC		2.5
ClinPred		0.99	D
GERP RS		4.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.61
gMVP		0.99

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs11074121; hg19: chr15-93521604;