16-1445005-C-G

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The NM_001287.6(CLCN7):c.*1626G>C variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.609 in 152,226 control chromosomes in the GnomAD database, including 28,717 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.61 (28702 hom., cov: 34)
  • Exomes 𝑓: 0.67 (15 hom.)
• Consequence: CLCN7 NM_001287.6 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -1.56

Genes affected

CLCN7 (HGNC:2025): (chloride voltage-gated channel 7) The product of this gene belongs to the CLC chloride channel family of proteins. Chloride channels play important roles in the plasma membrane and in intracellular organelles. This gene encodes chloride channel 7. Defects in this gene are the cause of osteopetrosis autosomal recessive type 4 (OPTB4), also called infantile malignant osteopetrosis type 2 as well as the cause of autosomal dominant osteopetrosis type 2 (OPTA2), also called autosomal dominant Albers-Schonberg disease or marble disease autosoml dominant. Osteopetrosis is a rare genetic disease characterized by abnormally dense bone, due to defective resorption of immature bone. OPTA2 is the most common form of osteopetrosis, occurring in adolescence or adulthood. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BP6: Variant 16-1445005-C-G is Benign according to our data. Variant chr16-1445005-C-G is described in ClinVar as [Benign]. Clinvar id is 317904.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.793 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CLCN7	NM_001287.6	c.*1626G>C		3_prime_UTR_variant	25/25	ENST00000382745.9
CLCN7	NM_001114331.3	c.*1626G>C		3_prime_UTR_variant	24/24
CLCN7	XM_011522354.2	c.*1626G>C		3_prime_UTR_variant	25/25

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CLCN7	ENST00000382745.9	c.*1626G>C		3_prime_UTR_variant	25/25	1	NM_001287.6	P1
CLCN7	ENST00000563642.6	n.4113G>C		non_coding_transcript_exon_variant	9/9	2

Frequencies

GnomAD3 genomes AF: 0.609 AC: 92528 AN: 152030 Hom.: 28664 Cov.: 34

Gnomad AFR AF: 0.699

Gnomad AMI AF: 0.599

Gnomad AMR AF: 0.591

Gnomad ASJ AF: 0.630

Gnomad EAS AF: 0.813

Gnomad SAS AF: 0.586

Gnomad FIN AF: 0.498

Gnomad MID AF: 0.652

Gnomad NFE AF: 0.560

Gnomad OTH AF: 0.612

GnomAD4 exome AF: 0.667 AC: 52 AN: 78 Hom.: 15 Cov.: 0 AF XY: 0.635 AC XY: 33 AN XY: 52

Gnomad4 AFR exome AF: 1.00

Gnomad4 ASJ exome AF: 1.00

Gnomad4 SAS exome AF: 0.600

Gnomad4 FIN exome AF: 0.833

Gnomad4 NFE exome AF: 0.643

Gnomad4 OTH exome AF: 0.500

GnomAD4 genome AF: 0.609 AC: 92624 AN: 152148 Hom.: 28702 Cov.: 34 AF XY: 0.605 AC XY: 44952 AN XY: 74360

Gnomad4 AFR AF: 0.699

Gnomad4 AMR AF: 0.591

Gnomad4 ASJ AF: 0.630

Gnomad4 EAS AF: 0.813

Gnomad4 SAS AF: 0.588

Gnomad4 FIN AF: 0.498

Gnomad4 NFE AF: 0.560

Gnomad4 OTH AF: 0.610

Alfa AF: 0.416 Hom.: 953

Bravo AF: 0.624

Asia WGS AF: 0.668 AC: 2321 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Osteopetrosis Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
Cadd	Benign	0.11
Dann	Benign	0.40

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: rs8767; hg19: chr16-1495006;