rs1555445701

Variant names:

• chr15-93014903-AATGCAG-T
• rs1555445701
• NM_001271.4:c.4900_4906delAATGCAGinsT

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM2 PM4 PP3

The ENST00000394196.9(CHD2):​c.4878_4884delAATGCAGinsT​(p.Pro1627_Asn1628del) variant causes a conservative inframe deletion, synonymous 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 Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CHD2 ENST00000394196.9 conservative_inframe_deletion, synonymous
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.74
• Publications: 0 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 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM4: Nonframeshift variant in NON repetitive region in ENST00000394196.9.
• PP3: No computational evidence supports a deleterious effect, but strongly conserved according to phyloP

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000394196.9. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CHD2	NM_001271.4	MANE Select	c.4900_4906delAATGCAGinsT	p.Asn1634_Asp1636delinsTyr	missense conservative_inframe_deletion splice_region	Exon 37 of 39	NP_001262.3

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CHD2	ENST00000394196.9	TSL:5 MANE Select	c.4878_4884delAATGCAGinsT	p.Pro1627_Asn1628del	conservative_inframe_deletion synonymous	Exon 37 of 39	ENSP00000377747.4
	CHD2	ENST00000626874.2	TSL:1	c.4878_4884delAATGCAGinsT	p.Pro1627_Asn1628del	conservative_inframe_deletion synonymous	Exon 37 of 38	ENSP00000486629.1
	CHD2	ENST00000625662.3	TSL:5	n.*1049_*1055delAATGCAGinsT		non_coding_transcript_exon	Exon 33 of 35	ENSP00000486007.2

Frequencies

GnomAD3 genomes Cov.: 32

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

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

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
PhyloP100		8.7

Splicing

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

Other links and lift over

dbSNP: rs1555445701; hg19: chr15-93558133;