chr17-7884935-T-C

Variant names:

• chr17-7884935-T-C
• rs1396427991
• NM_001437504.1:c.129T>C

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_Strong BP7

The NM_001437504.1(CHD3):​c.129T>C​(p.Asp43Asp) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000816 in 1,348,518 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.0000068 (0 hom., cov: 28)
  • Exomes 𝑓: 0.0000083 (0 hom.)
• Consequence: CHD3 NM_001437504.1 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0880
• Publications: 0 publications found

Genes affected

CHD3 (HGNC:1918): (chromodomain helicase DNA binding protein 3) This gene encodes a member of the CHD family of proteins which are characterized by the presence of chromo (chromatin organization modifier) domains and SNF2-related helicase/ATPase domains. This protein is one of the components of a histone deacetylase complex referred to as the Mi-2/NuRD complex which participates in the remodeling of chromatin by deacetylating histones. Chromatin remodeling is essential for many processes including transcription. Autoantibodies against this protein are found in a subset of patients with dermatomyositis. Three alternatively spliced transcripts encoding different isoforms have been described. [provided by RefSeq, Jul 2008]

NAA38 (HGNC:28212): (N-alpha-acetyltransferase 38, NatC auxiliary subunit) Involved in negative regulation of apoptotic process. Located in cytoplasm and nucleoplasm. Part of NatC complex. Colocalizes with polysome. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.73).
• BP7: Synonymous conserved (PhyloP=-0.088 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001437504.1. 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
	CHD3	NM_001437504.1		c.129T>C	p.Asp43Asp	synonymous	Exon 1 of 40	NP_001424433.1	A0A8V8TR54
	CHD3	NM_001005271.3		c.129T>C	p.Asp43Asp	synonymous	Exon 1 of 40	NP_001005271.2	Q12873-3
	CHD3	NM_001437509.1		c.129T>C	p.Asp43Asp	synonymous	Exon 1 of 40	NP_001424438.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CHD3	ENST00000700753.1		c.129T>C	p.Asp43Asp	synonymous	Exon 1 of 40	ENSP00000515165.1	A0A8V8TR54
	CHD3	ENST00000380358.9	TSL:2	c.129T>C	p.Asp43Asp	synonymous	Exon 1 of 40	ENSP00000369716.4	Q12873-3
	NAA38	ENST00000576861.5	TSL:3	c.-167+230A>G		intron	N/A	ENSP00000461545.1	I3L4V0

Frequencies

GnomAD3 genomes AF: 0.00000682 AC: 1 AN: 146722 Hom.: 0 Cov.: 28

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000152

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000832 AC: 10 AN: 1201796 Hom.: 0 Cov.: 32 AF XY: 0.0000102 AC XY: 6 AN XY: 588914

African (AFR) AF: 0.00 AC: 0 AN: 24766

American (AMR) AF: 0.00 AC: 0 AN: 24634

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 17764

East Asian (EAS) AF: 0.00 AC: 0 AN: 24498

South Asian (SAS) AF: 0.00 AC: 0 AN: 59294

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 30534

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3308

European-Non Finnish (NFE) AF: 0.0000103 AC: 10 AN: 970404

Other (OTH) AF: 0.00 AC: 0 AN: 46594

GnomAD4 genome AF: 0.00000682 AC: 1 AN: 146722 Hom.: 0 Cov.: 28 AF XY: 0.00 AC XY: 0 AN XY: 71396

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 40130

American (AMR) AF: 0.00 AC: 0 AN: 14912

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3384

East Asian (EAS) AF: 0.00 AC: 0 AN: 4838

South Asian (SAS) AF: 0.00 AC: 0 AN: 4554

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 9954

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 298

European-Non Finnish (NFE) AF: 0.0000152 AC: 1 AN: 65732

Other (OTH) AF: 0.00 AC: 0 AN: 2018

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.73
CADD	Benign	15
DANN	Benign	0.50
PhyloP100		-0.088
PromoterAI		0.035	Neutral
RBP_binding_hub_radar		0.97
RBP_regulation_power_radar		2.1

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

Other links and lift over

dbSNP: rs1396427991; hg19: chr17-7788253;