8-60830496-G-A

Position:

• chr8-60830496-G-A

Variant summary

Our verdict is Benign. Variant got -19 ACMG points: 1P and 20B. PP2 BP4_Strong BP6_Very_Strong BS1 BS2

The NM_017780.4(CHD7):​c.3697G>A​(p.Gly1233Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000423 in 1,613,946 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0022 (2 hom., cov: 32)
  • Exomes 𝑓: 0.00024 (2 hom.)
• Consequence: CHD7 NM_017780.4 missense
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:10
• Conservation: PhyloP100: 8.15

Genes affected

CHD7 (HGNC:20626): (chromodomain helicase DNA binding protein 7) This gene encodes a protein that contains several helicase family domains. Mutations in this gene have been found in some patients with the CHARGE syndrome. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2015]

ACMG classification

Verdict is Benign. Variant got -19 ACMG points.

• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), CHD7. . Gene score misZ 3.2193 (greater than the threshold 3.09). Trascript score misZ 3.9401 (greater than threshold 3.09). GenCC has associacion of gene with Kallmann syndrome, hypogonadotropic hypogonadism 5 with or without anosmia, CHARGE syndrome, hypogonadotropic hypogonadism, Omenn syndrome.
• BP4: Computational evidence support a benign effect (MetaRNN=0.0094046).
• BP6: Variant 8-60830496-G-A is Benign according to our data. Variant chr8-60830496-G-A is described in ClinVar as [Benign]. Clinvar id is 194546.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr8-60830496-G-A is described in Lovd as [Benign].
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00219 (333/152282) while in subpopulation AFR AF= 0.00775 (322/41554). AF 95% confidence interval is 0.00705. There are 2 homozygotes in gnomad4. There are 162 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 333 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CHD7	NM_017780.4	c.3697G>A	p.Gly1233Ser	missense_variant	15/38	ENST00000423902.7	NP_060250.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CHD7	ENST00000423902.7	c.3697G>A	p.Gly1233Ser	missense_variant	15/38	5	NM_017780.4	ENSP00000392028.1
CHD7	ENST00000524602.5	c.1717-31733G>A		intron_variant		1		ENSP00000437061.1
CHD7	ENST00000695853.1	n.3697G>A		non_coding_transcript_exon_variant	15/37			ENSP00000512218.1

Frequencies

GnomAD3 genomes AF: 0.00218 AC: 332 AN: 152164 Hom.: 2 Cov.: 32

Gnomad AFR AF: 0.00775

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000524

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: 0.0000294

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.000626 AC: 156 AN: 249276 Hom.: 1 AF XY: 0.000555 AC XY: 75 AN XY: 135238

Gnomad AFR exome AF: 0.00911

Gnomad AMR exome AF: 0.000348

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000885

Gnomad OTH exome AF: 0.000330

GnomAD4 exome AF: 0.000239 AC: 350 AN: 1461664 Hom.: 2 Cov.: 32 AF XY: 0.000231 AC XY: 168 AN XY: 727118

Gnomad4 AFR exome AF: 0.00893

Gnomad4 AMR exome AF: 0.000335

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000117

Gnomad4 OTH exome AF: 0.000364

GnomAD4 genome AF: 0.00219 AC: 333 AN: 152282 Hom.: 2 Cov.: 32 AF XY: 0.00218 AC XY: 162 AN XY: 74458

Gnomad4 AFR AF: 0.00775

Gnomad4 AMR AF: 0.000523

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000294

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.000397 Hom.: 0

Bravo AF: 0.00263

ESP6500AA AF: 0.00730 AC: 28

ESP6500EA AF: 0.00 AC: 0

ExAC AF: 0.000745 AC: 90

ClinVar

Significance: Benign

Submissions summary: Benign:10

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:4

Benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Aug 23, 2017	p.Gly1233Ser in exon 15 of CHD7: This variant is not expected to have clinical s ignificance because it has been identified in 0.87% (85/9800) of African chromos omes by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.org; dbSNP rs190548814). -
Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	May 27, 2014	- -
Benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Dec 05, 2017	- -
Benign, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -

not provided Benign:4

Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	May 01, 2024	CHD7: BS1, BS2 -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Dec 02, 2019	This variant is associated with the following publications: (PMID: 30653986) -

CHARGE syndrome Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 25, 2023

- -

Inborn genetic diseases Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

May 25, 2017

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.086
BayesDel_addAF	Benign	-0.28	T
BayesDel_noAF	Benign	-0.18
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.40	T
Eigen	Uncertain	0.36
Eigen_PC	Uncertain	0.50
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.92	D
M_CAP	Uncertain	0.11	D
MetaRNN	Benign	0.0094	T
MetaSVM	Benign	-0.59	T
MutationAssessor	Benign	0.070	N
PrimateAI	Pathogenic	0.82	D
PROVEAN	Benign	0.080	N
REVEL	Uncertain	0.34
Sift	Benign	0.10	T
Sift4G	Uncertain	0.014	D
Polyphen		0.75	P
Vest4		0.37
MVP		0.76
MPC		1.6
ClinPred		0.066	T
GERP RS		5.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.18
gMVP		0.64

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs190548814; hg19: chr8-61743055;