chr15-92946064-A-T

Variant names:

• chr15-92946064-A-T
• rs531251618
• NM_001271.4:c.1225A>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001271.4(CHD2):​c.1225A>T​(p.Asn409Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000692 in 1,444,854 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. N409D) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: CHD2 NM_001271.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.53
• Publications: 2 publications found

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]

CHD2 Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• developmental and epileptic encephalopathy 94

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• Lennox-Gastaut syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• myoclonic-astatic epilepsy

  Inheritance: Unknown Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001271.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CHD2	NM_001271.4	MANE Select	c.1225A>T	p.Asn409Tyr	missense	Exon 12 of 39	NP_001262.3	O14647-1
	CHD2	NM_001042572.3		c.1225A>T	p.Asn409Tyr	missense	Exon 12 of 13	NP_001036037.1	O14647-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CHD2	ENST00000394196.9	TSL:5 MANE Select	c.1225A>T	p.Asn409Tyr	missense	Exon 12 of 39	ENSP00000377747.4	O14647-1
	CHD2	ENST00000626874.2	TSL:1	c.1225A>T	p.Asn409Tyr	missense	Exon 12 of 38	ENSP00000486629.1	O14647-2
	CHD2	ENST00000420239.7	TSL:1	c.1225A>T	p.Asn409Tyr	missense	Exon 12 of 13	ENSP00000406581.2	O14647-3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.92e-7 AC: 1 AN: 1444854 Hom.: 0 Cov.: 31 AF XY: 0.00000139 AC XY: 1 AN XY: 717374

African (AFR) AF: 0.00 AC: 0 AN: 32992

American (AMR) AF: 0.00 AC: 0 AN: 43026

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25564

East Asian (EAS) AF: 0.00 AC: 0 AN: 39510

South Asian (SAS) AF: 0.00 AC: 0 AN: 83368

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52810

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5656

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1102308

Other (OTH) AF: 0.0000168 AC: 1 AN: 59620

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000113

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Developmental and epileptic encephalopathy 94 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Uncertain	0.051	T
BayesDel_noAF	Benign	-0.16
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.59	D
Eigen	Uncertain	0.62
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.88	D
M_CAP	Uncertain	0.12	D
MetaRNN	Uncertain	0.47	T
MetaSVM	Uncertain	0.039	D
MutationAssessor	Uncertain	2.8	M
PhyloP100		3.5
PrimateAI	Uncertain	0.69	T
PROVEAN	Benign	-2.1	N
REVEL	Uncertain	0.43
Sift	Benign	0.030	D
Sift4G	Benign	0.23	T
Polyphen		0.98	D
Vest4		0.72
MutPred		0.49		Gain of phosphorylation at N409 (P = 0.0188)
MVP		0.71
MPC		1.2
ClinPred		0.91	D
GERP RS		5.2
RBP_binding_hub_radar		1.1
RBP_regulation_power_radar		2.8
Varity_R		0.12
gMVP		0.49

Splicing

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

Other links and lift over

dbSNP: rs531251618; hg19: chr15-93489294;