chr12-6587756-T-A

Position:

• chr12-6587756-T-A

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2 PM5 PP2 PP3_Moderate

The NM_001273.5(CHD4):​c.3659A>T​(p.Lys1220Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 12/21 in silico tools predict a damaging outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K1220T) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CHD4 NM_001273.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.98

Genes affected

CHD4 (HGNC:1919): (chromodomain helicase DNA binding protein 4) The product of this gene belongs to the SNF2/RAD54 helicase family. It represents the main component of the nucleosome remodeling and deacetylase complex and plays an important role in epigenetic transcriptional repression. Patients with dermatomyositis develop antibodies against this protein. Somatic mutations in this gene are associated with serous endometrial tumors. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2014]

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr12-6587756-T-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 520917.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), CHD4. . Gene score misZ 6.3412 (greater than the threshold 3.09). Trascript score misZ 8.6114 (greater than threshold 3.09). GenCC has associacion of gene with syndromic intellectual disability, Sifrim-Hitz-Weiss syndrome.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.867

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CHD4	NM_001273.5	c.3659A>T	p.Lys1220Ile	missense_variant	24/40	ENST00000544040.7
CHD4	NM_001297553.2	c.3638A>T	p.Lys1213Ile	missense_variant	23/39
CHD4	NM_001363606.2	c.3620A>T	p.Lys1207Ile	missense_variant	24/40

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHD4	ENST00000544040.7	c.3659A>T	p.Lys1220Ile	missense_variant	24/40	5	NM_001273.5	A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.34	D
BayesDel_noAF	Pathogenic	0.25
CADD	Pathogenic	26
DANN	Uncertain	0.99
DEOGEN2	Benign	0.16	.;T;.;D;.;.;.;.;.;.;.;.
Eigen	Pathogenic	0.71
Eigen_PC	Pathogenic	0.73
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	0.99	D;D;D;D;D;D;D;D;D;D;D;D
M_CAP	Pathogenic	0.41	D
MetaRNN	Pathogenic	0.87	D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	0.61	D
MutationAssessor	Pathogenic	3.8	.;.;.;H;.;.;.;.;H;.;.;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.88	D
PROVEAN	Pathogenic	-6.6	.;D;.;.;.;.;.;.;.;.;.;.
REVEL	Pathogenic	0.83
Sift	Uncertain	0.0010	.;D;.;.;.;.;.;.;.;.;.;.
Sift4G	Pathogenic	0.0010	.;D;.;.;.;.;.;.;.;.;.;.
Polyphen		1.0, 0.25, 0.80	.;.;D;B;.;.;.;.;P;.;.;.
Vest4		0.80
MutPred		0.51		.;.;.;Loss of disorder (P = 0.004);.;.;.;.;Loss of disorder (P = 0.004);.;Loss of disorder (P = 0.004);.;
MVP		0.88
MPC		2.5
ClinPred		1.0	D
GERP RS		5.9
Varity_R		0.74
gMVP		0.99

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: rs1377989582; hg19: chr12-6696922;