14-21385698-T-A

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 1P and 6B. PP2BP4_ModerateBS2

The NM_001170629.2(CHD8):c.7661A>T(p.Tyr2554Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000644 in 1,551,930 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. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. Y2554Y) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 30)

Exomes 𝑓: 0.0000057 ( 0 hom. )

Consequence

CHD8
NM_001170629.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 2.91

Variant links:

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]

CHD8 links:

LOC107984643 (HGNC:):

LOC107984643 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

PP2

Missense variant where missense usually causes diseases, CHD8

BP4

Computational evidence support a benign effect (MetaRNN=0.13986331).

BS2

High AC in GnomAdExome at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
CHD8	NM_001170629.2 linkuse as main transcript	c.7661A>T	p.Tyr2554Phe	missense_variant	38/38	ENST00000646647.2
LOC107984643	XR_001750627.2 linkuse as main transcript	n.441+985T>A		intron_variant, non_coding_transcript_variant
CHD8	NM_020920.4 linkuse as main transcript	c.6824A>T	p.Tyr2275Phe	missense_variant	38/38

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHD8	ENST00000646647.2 linkuse as main transcript	c.7661A>T	p.Tyr2554Phe	missense_variant	38/38		NM_001170629.2	P3	Q9HCK8-1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152116

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000387

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000316

AC:

AN:

158178

Hom.:

AF XY:

0.0000240

AC XY:

AN XY:

83358

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000459

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000572

AC:

AN:

1399696

Hom.:

Cov.:

AF XY:

0.00000579

AC XY:

AN XY:

690332

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000224

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152234

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74454

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000388

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jan 01, 2024

This sequence change replaces tyrosine, which is neutral and polar, with phenylalanine, which is neutral and non-polar, at codon 2554 of the CHD8 protein (p.Tyr2554Phe). This variant is present in population databases (no rsID available, gnomAD 0.05%). This missense change has been observed in individual(s) with autism spectrum disorder (PMID: 30564305). ClinVar contains an entry for this variant (Variation ID: 2635772). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. 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. -

CHD8-related disorder

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Sep 08, 2023

The CHD8 c.7661A>T variant is predicted to result in the amino acid substitution p.Tyr2554Phe. This variant was reported as a maternally-inherited variant in an individual with autism spectrum disorder (additional file 6, Guo et al. 2018. PubMed ID: 30564305). This variant is reported in 0.046% of alleles in individuals of East Asian descent in gnomAD (http://gnomad.broadinstitute.org/variant/14-21853857-T-A). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.13

BayesDel_noAF

Uncertain

-0.080

Cadd

Benign

Dann

Benign

0.97

Eigen

Benign

-0.18

Eigen_PC

Benign

0.046

FATHMM_MKL

Benign

0.73

M_CAP

Benign

0.056

MetaRNN

Benign

0.14

T;T;T;T;T;T

MetaSVM

Benign

-0.32

MutationTaster

Benign

0.62

D;N;N

PrimateAI

Uncertain

0.75

PROVEAN

Benign

-0.70

N;N;.;.;N;.

REVEL

Uncertain

0.34

Sift

Pathogenic

0.0

D;D;.;.;D;.

Sift4G

Benign

0.70

T;T;.;.;T;.

Polyphen

0.010

B;.;.;B;.;.

Vest4

0.47

MutPred

0.23

.;Loss of phosphorylation at Y2554 (P = 0.0241);Loss of phosphorylation at Y2554 (P = 0.0241);.;Loss of phosphorylation at Y2554 (P = 0.0241);Loss of phosphorylation at Y2554 (P = 0.0241);

MVP

0.75

MPC

0.35

ClinPred

0.19

GERP RS

5.3

Varity_R

0.36

gMVP

0.043

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over