rs766776212

Variant names:

• chr8-60853003-G-A
• rs766776212
• NM_017780.4:c.6278G>A

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 1P and 9B. PP3 BP6 BS1 BS2

The NM_017780.4(CHD7):​c.6278G>A​(p.Cys2093Tyr) variant causes a missense change. The variant allele was found at a frequency of 0.00000958 in 1,461,712 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000096 (0 hom.)
• Consequence: CHD7 NM_017780.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:1
• Conservation: PhyloP100: 5.56

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 -8 ACMG points.

• PP3: MetaRNN computational evidence supports a deleterious effect, 0.828
• BP6: Variant 8-60853003-G-A is Benign according to our data. Variant chr8-60853003-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 411181.We mark this variant Likely_benign, oryginal submissions are: {Benign=1, Uncertain_significance=2}.
• BS1: Variant frequency is greater than expected in population amr. gnomad4_exome allele frequency = 0.00000958 (14/1461712) while in subpopulation AMR AF= 0.000291 (13/44724). AF 95% confidence interval is 0.000171. There are 0 homozygotes in gnomad4_exome. There are 9 alleles in male gnomad4_exome subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High AC in GnomAdExome4 at 14 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHD7	NM_017780.4	c.6278G>A	p.Cys2093Tyr	missense_variant	Exon 31 of 38	ENST00000423902.7	NP_060250.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHD7	ENST00000423902.7	c.6278G>A	p.Cys2093Tyr	missense_variant	Exon 31 of 38	5	NM_017780.4	ENSP00000392028.1
CHD7	ENST00000524602.5	c.1717-9226G>A		intron_variant	Intron 2 of 4	1		ENSP00000437061.1
CHD7	ENST00000695853.1	n.6278G>A		non_coding_transcript_exon_variant	Exon 31 of 37			ENSP00000512218.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000361 AC: 9 AN: 249170 Hom.: 0 AF XY: 0.0000370 AC XY: 5 AN XY: 135174

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000261

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: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000958 AC: 14 AN: 1461712 Hom.: 0 Cov.: 32 AF XY: 0.0000124 AC XY: 9 AN XY: 727138

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.000291

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: 0.00

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

Bravo AF: 0.0000151

ExAC AF: 0.0000413 AC: 5

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Uncertain:1

Mar 01, 2022

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

CHARGE syndrome;C3552553:Hypogonadotropic hypogonadism 5 with or without anosmia Uncertain:1

Feb 14, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

CHARGE syndrome Benign:1

Aug 14, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.77
BayesDel_addAF	Uncertain	0.13	D
BayesDel_noAF	Pathogenic	0.24
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.66	D
Eigen	Uncertain	0.58
Eigen_PC	Uncertain	0.58
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.96	D
M_CAP	Uncertain	0.14	D
MetaRNN	Pathogenic	0.83	D
MetaSVM	Uncertain	-0.059	T
MutationAssessor	Uncertain	2.2	M
PrimateAI	Pathogenic	0.83	D
PROVEAN	Pathogenic	-7.7	D
REVEL	Pathogenic	0.65
Sift	Uncertain	0.023	D
Sift4G	Uncertain	0.0090	D
Polyphen		0.98	D
Vest4		0.88
MutPred		0.52		Gain of phosphorylation at C2093 (P = 0.0542);
MVP		0.93
MPC		0.76
ClinPred		0.61	D
GERP RS		5.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.2
Varity_R		0.60
gMVP		0.66

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: rs766776212; hg19: chr8-61765562;