X-50088749-C-T

Variant names:

• chrX-50088749-C-T
• rs797044811
• NM_001127898.4:c.1609C>T

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_001127898.4(CLCN5):​c.1609C>T​(p.Arg537*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000911 in 1,097,813 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. R537R) has been classified as Uncertain significance. Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 9.1e-7 (0 hom. 0 hem.)
• Consequence: CLCN5 NM_001127898.4 stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:5 O:1
• Conservation: PhyloP100: 0.878
• Publications: 7 publications found

Genes affected

CLCN5 (HGNC:2023): (chloride voltage-gated channel 5) This gene encodes a member of the ClC family of chloride ion channels and ion transporters. The encoded protein is primarily localized to endosomal membranes and may function to facilitate albumin uptake by the renal proximal tubule. Mutations in this gene have been found in Dent disease and renal tubular disorders complicated by nephrolithiasis. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jan 2013]

CLCN5 Gene-Disease associations (from GenCC):

• Dent disease type 1

  Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, ClinGen, Labcorp Genetics (formerly Invitae), Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-50088749-C-T is Pathogenic according to our data. Variant chrX-50088749-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 207997.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001127898.4. 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
	CLCN5	NM_001127898.4	MANE Select	c.1609C>T	p.Arg537*	stop_gained	Exon 12 of 15	NP_001121370.1	P51795-2
	CLCN5	NM_001440756.1		c.1621C>T	p.Arg541*	stop_gained	Exon 12 of 15	NP_001427685.1
	CLCN5	NM_001440757.1		c.1621C>T	p.Arg541*	stop_gained	Exon 12 of 15	NP_001427686.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CLCN5	ENST00000376091.8	TSL:2 MANE Select	c.1609C>T	p.Arg537*	stop_gained	Exon 12 of 15	ENSP00000365259.3	P51795-2
	CLCN5	ENST00000307367.2	TSL:1	c.1399C>T	p.Arg467*	stop_gained	Exon 9 of 12	ENSP00000304257.2	P51795-1
	CLCN5	ENST00000376108.7	TSL:1	c.1399C>T	p.Arg467*	stop_gained	Exon 9 of 12	ENSP00000365276.3	P51795-1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome AF: 9.11e-7 AC: 1 AN: 1097813 Hom.: 0 Cov.: 29 AF XY: 0.00 AC XY: 0 AN XY: 363217

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

African (AFR) AF: 0.00 AC: 0 AN: 26387

American (AMR) AF: 0.00 AC: 0 AN: 35201

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19380

East Asian (EAS) AF: 0.00 AC: 0 AN: 30203

South Asian (SAS) AF: 0.00 AC: 0 AN: 54136

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40532

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4133

European-Non Finnish (NFE) AF: 0.00000119 AC: 1 AN: 841758

Other (OTH) AF: 0.00 AC: 0 AN: 46083

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 23

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
4	-	-	not provided (4)
1	-	-	Dent disease type 1 (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.74	D
BayesDel_noAF	Pathogenic	0.51
CADD	Pathogenic	36
DANN	Uncertain	1.0
FATHMM_MKL	Benign	0.55	D
PhyloP100		0.88
Vest4		0.92
GERP RS		4.6
Mutation Taster		=0/200	disease causing (ClinVar)

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: rs797044811; hg19: chrX-49853406;