Genetic Variant CYLD:p.Arg936* (chr16-50796443-C-T) – ACMG Classification: Pathogenic (12 pts)

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1_ModeratePM2PP5_Very_Strong

The NM_001378743.1(CYLD):c.2806C>T(p.Arg936*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,772 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 Pathogenic (★★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

CYLD
NM_001378743.1 stop_gained

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:7

Conservation

PhyloP100: 3.00

Publications

19 publications found

Variant links:

Genes affected

CYLD (HGNC:2584): (CYLD lysine 63 deubiquitinase) This gene is encodes a cytoplasmic protein with three cytoskeletal-associated protein-glycine-conserved (CAP-GLY) domains that functions as a deubiquitinating enzyme. Mutations in this gene have been associated with cylindromatosis, multiple familial trichoepithelioma, and Brooke-Spiegler syndrome. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. [provided by RefSeq, Jul 2008]

CYLD links:

CYLD-AS2 (HGNC:56848): (CYLD antisense RNA 2)

CYLD-AS2 links:

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ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 12 ACMG points.

PVS1

Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.0226 CDS is truncated, and there are 1 pathogenic variants in the truncated region.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 16-50796443-C-T is Pathogenic according to our data. Variant chr16-50796443-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 5259.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CYLD	NM_001378743.1 link	c.2806C>T	p.Arg936*	stop_gained	Exon 19 of 19	ENST00000427738.8	NP_001365672.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CYLD	ENST00000427738.8 link	c.2806C>T	p.Arg936*	stop_gained	Exon 19 of 19	5	NM_001378743.1	ENSP00000392025.3		Q9NQC7-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461772

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727192

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33478

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.00

AC:

AN:

86248

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53414

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5696

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111988

Other (OTH)

AF:

0.00

AC:

AN:

60390

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Familial cylindromatosis

Pathogenic:2

Sep 01, 2006

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Sep 23, 2016

Genomic Diagnostic Laboratory, Division of Genomic Diagnostics, Children's Hospital of Philadelphia

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Brooke-Spiegler syndrome

Pathogenic:2

Mar 24, 2025

Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The following ACMG criteria has been used: PVS1, PM2_sup, PP4_M -

Sep 01, 2006

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Familial multiple trichoepitheliomata

Pathogenic:1

Sep 01, 2006

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Familial cylindromatosis;C1857941:Brooke-Spiegler syndrome;C5436881:Frontotemporal dementia and/or amyotrophic lateral sclerosis 8;CN296585:Trichoepithelioma, multiple familial, 1

Pathogenic:1

Dec 31, 2021

Fulgent Genetics, Fulgent Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Pathogenic:1

Aug 21, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change creates a premature translational stop signal (p.Arg936*) in the CYLD gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 21 amino acid(s) of the CYLD protein. This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individuals with Brooke‚ÄìSpiegler syndrome, cylindromatosis, and/or multiple familial trichoepitheliomas (PMID: 10835629, 23249834, 23584127). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 5259). For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.57

BayesDel_noAF

Pathogenic

0.59

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

Eigen

Uncertain

0.57

Eigen_PC

Uncertain

0.38

FATHMM_MKL

Uncertain

0.95

PhyloP100

3.0

Vest4

0.74

GERP RS

3.8

Mutation Taster

=1/199

disease causing (ClinVar)

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over