Genetic Variant CTSC:c.*253T>C (chr11-88293753-A-G) – ACMG Classification: Benign (-14 pts)

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_StrongBP6_ModerateBS1BS2

The NM_001814.6(CTSC):c.*253T>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 0.00282 in 516,386 control chromosomes in the GnomAD database, including 20 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

Frequency

Genomes: 𝑓 0.0066 ( 17 hom., cov: 32)

Exomes 𝑓: 0.0012 ( 3 hom. )

Consequence

CTSC
NM_001814.6 3_prime_UTR

Scores

Clinical Significance

Benign criteria provided, single submitter B:2

Conservation

PhyloP100: 0.341

Variant links:

Genes affected

CTSC (HGNC:2528): (cathepsin C) This gene encodes a member of the peptidase C1 family and lysosomal cysteine proteinase that appears to be a central coordinator for activation of many serine proteinases in cells of the immune system. Alternative splicing results in multiple transcript variants, at least one of which encodes a preproprotein that is proteolytically processed to generate heavy and light chains that form a disulfide-linked dimer. A portion of the propeptide acts as an intramolecular chaperone for the folding and stabilization of the mature enzyme. This enzyme requires chloride ions for activity and can degrade glucagon. Defects in the encoded protein have been shown to be a cause of Papillon-Lefevre syndrome, an autosomal recessive disorder characterized by palmoplantar keratosis and periodontitis. [provided by RefSeq, Nov 2015]

CTSC links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -14 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.89).

BP6

Variant 11-88293753-A-G is Benign according to our data. Variant chr11-88293753-A-G is described in ClinVar as [Benign]. Clinvar id is 306416.Status of the report is criteria_provided_single_submitter, 1 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00662 (1008/152360) while in subpopulation AFR AF= 0.0226 (939/41586). AF 95% confidence interval is 0.0214. There are 17 homozygotes in gnomad4. There are 476 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 17 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CTSC	NM_001814.6 link	c.*253T>C		3_prime_UTR_variant	Exon 7 of 7	ENST00000227266.10	NP_001805.4	P53634-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CTSC	ENST00000227266 link	c.*253T>C		3_prime_UTR_variant	Exon 7 of 7	1	NM_001814.6	ENSP00000227266.4		P53634-1

Frequencies

GnomAD3 genomes

AF:

0.00663

AC:

1009

AN:

152242

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0227

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00281

Gnomad ASJ

AF:

0.000864

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000162

Gnomad OTH

AF:

0.00526

GnomAD4 exome

AF:

0.00123

AC:

447

AN:

364026

Hom.:

Cov.:

AF XY:

0.00105

AC XY:

201

AN XY:

190944

show subpopulations

Gnomad4 AFR exome

AF:

0.0245

Gnomad4 AMR exome

AF:

0.00244

Gnomad4 ASJ exome

AF:

0.00237

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000278

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000259

Gnomad4 OTH exome

AF:

0.00237

GnomAD4 genome

AF:

0.00662

AC:

1008

AN:

152360

Hom.:

Cov.:

AF XY:

0.00639

AC XY:

476

AN XY:

74504

show subpopulations

Gnomad4 AFR

AF:

0.0226

Gnomad4 AMR

AF:

0.00281

Gnomad4 ASJ

AF:

0.000864

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000162

Gnomad4 OTH

AF:

0.00521

Alfa

AF:

0.00260

Hom.:

Bravo

AF:

0.00776

Asia WGS

AF:

0.00116

AC:

AN:

3474

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Papillon-Lefèvre syndrome

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. -

Haim-Munk syndrome

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.89

CADD

Benign

5.2

DANN

Benign

0.59

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over