14-21385752-G-T

Variant names:

• chr14-21385752-G-T
• rs1064795453
• NM_001170629.2:c.7607C>A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_001170629.2(CHD8):​c.7607C>A​(p.Pro2536His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000214 in 1,399,530 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 30)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: CHD8 NM_001170629.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.00

Genes affected

CHD8 (HGNC:20153): (chromodomain helicase DNA binding protein 8) This gene encodes a member of the chromodomain-helicase-DNA binding protein family, which is characterized by a SNF2-like domain and two chromatin organization modifier domains. The encoded protein also contains brahma and kismet domains, which are common to the subfamily of chromodomain-helicase-DNA binding proteins to which this protein belongs. This gene has been shown to function in several processes that include transcriptional regulation, epigenetic remodeling, promotion of cell proliferation, and regulation of RNA synthesis. Allelic variants of this gene are associated with autism spectrum disorder. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2016]

LOC107984643 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the CHD8 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 18 curated pathogenic missense variants (we use a threshold of 10). The gene has 51 curated benign missense variants. Trascript score misZ: 7.0202 (above the threshold of 3.09). GenCC associations: The gene is linked to autism, intellectual disability, intellectual developmental disorder with autism and macrocephaly, congenital myasthenic syndrome, complex neurodevelopmental disorder.
• BP4: Computational evidence support a benign effect (MetaRNN=0.19456154).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHD8	NM_001170629.2	c.7607C>A	p.Pro2536His	missense_variant	Exon 38 of 38	ENST00000646647.2	NP_001164100.1
CHD8	NM_020920.4	c.6770C>A	p.Pro2257His	missense_variant	Exon 38 of 38		NP_065971.2
LOC107984643	XR_001750627.2	n.441+1039G>T		intron_variant	Intron 1 of 1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHD8	ENST00000646647.2	c.7607C>A	p.Pro2536His	missense_variant	Exon 38 of 38		NM_001170629.2	ENSP00000495240.1

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome AF: 0.00000214 AC: 3 AN: 1399530 Hom.: 0 Cov.: 35 AF XY: 0.00000145 AC XY: 1 AN XY: 690270

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000278

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 30

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.091
BayesDel_addAF	Uncertain	0.040	T
BayesDel_noAF	Benign	-0.18
CADD	Benign	20
DANN	Benign	0.96
DEOGEN2	Benign	0.19	.;T;T;.;T;T
Eigen	Uncertain	0.33
Eigen_PC	Uncertain	0.36
FATHMM_MKL	Uncertain	0.83	D
LIST_S2	Benign	0.69	.;T;.;T;.;.
M_CAP	Benign	0.083	D
MetaRNN	Benign	0.19	T;T;T;T;T;T
MetaSVM	Uncertain	0.42	D
MutationAssessor	Benign	0.34	.;N;N;.;N;N
PrimateAI	Benign	0.46	T
PROVEAN	Benign	-0.46	N;N;.;.;N;.
REVEL	Uncertain	0.34
Sift	Benign	0.048	D;D;.;.;D;.
Sift4G	Uncertain	0.0090	D;D;.;.;D;.
Polyphen		1.0	D;.;.;D;.;.
Vest4		0.17
MutPred		0.18		.;Loss of relative solvent accessibility (P = 0.0981);Loss of relative solvent accessibility (P = 0.0981);.;Loss of relative solvent accessibility (P = 0.0981);Loss of relative solvent accessibility (P = 0.0981);
MVP		0.31
MPC		0.34
ClinPred		0.58	D
GERP RS		4.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.16
gMVP		0.34

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: rs1064795453; hg19: chr14-21853911;