rs587778225

Variant names:

• chr16-50751764-C-A
• rs587778225
• NM_001378743.1:c.665C>A

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_Strong BS1_Supporting BS2

The NM_001378743.1(CYLD):​c.665C>A​(p.Thr222Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000421 in 1,613,466 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000072 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000039 (0 hom.)
• Consequence: CYLD NM_001378743.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:3 O:1
• Conservation: PhyloP100: 1.81
• Publications: 3 publications found

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 Gene-Disease associations (from GenCC):

• Brooke-Spiegler syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), Ambry Genetics
• familial cylindromatosis

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Genomics England PanelApp
• frontotemporal dementia and/or amyotrophic lateral sclerosis 8

  Inheritance: AD Classification: STRONG, LIMITED Submitted by: ClinGen, Labcorp Genetics (formerly Invitae)
• trichoepithelioma, multiple familial, 1

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
• familial multiple trichoepithelioma

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• amyotrophic lateral sclerosis

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Benign. The variant received -9 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.04516092).
• BS1: Variant frequency is greater than expected in population amr. GnomAd4 allele frequency = 0.0000724 (11/151868) while in subpopulation AMR AF = 0.000525 (8/15246). AF 95% confidence interval is 0.000261. There are 0 homozygotes in GnomAd4. There are 6 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting
• BS2: High AC in GnomAd4 at 11 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CYLD	NM_001378743.1	c.665C>A	p.Thr222Lys	missense_variant	Exon 4 of 19	ENST00000427738.8	NP_001365672.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CYLD	ENST00000427738.8	c.665C>A	p.Thr222Lys	missense_variant	Exon 4 of 19	5	NM_001378743.1	ENSP00000392025.3

Frequencies

GnomAD3 genomes AF: 0.0000724 AC: 11 AN: 151868 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000525

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000481 AC: 12 AN: 249444 AF XY: 0.0000591

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000145

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000618

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000390 AC: 57 AN: 1461598 Hom.: 0 Cov.: 31 AF XY: 0.0000330 AC XY: 24 AN XY: 727104

African (AFR) AF: 0.00 AC: 0 AN: 33468

American (AMR) AF: 0.000112 AC: 5 AN: 44676

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26128

East Asian (EAS) AF: 0.00 AC: 0 AN: 39688

South Asian (SAS) AF: 0.0000232 AC: 2 AN: 86248

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53408

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.0000441 AC: 49 AN: 1111824

Other (OTH) AF: 0.0000166 AC: 1 AN: 60390

GnomAD4 genome AF: 0.0000724 AC: 11 AN: 151868 Hom.: 0 Cov.: 32 AF XY: 0.0000809 AC XY: 6 AN XY: 74150

African (AFR) AF: 0.00 AC: 0 AN: 41334

American (AMR) AF: 0.000525 AC: 8 AN: 15246

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5184

South Asian (SAS) AF: 0.00 AC: 0 AN: 4820

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10516

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000441 AC: 3 AN: 67990

Other (OTH) AF: 0.00 AC: 0 AN: 2084

Alfa AF: 0.000142 Hom.: 0

Bravo AF: 0.0000453

ExAC AF: 0.0000331 AC: 4

EpiCase AF: 0.0000545

EpiControl AF: 0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3 Other:1

Revision: criteria provided, single submitter

Submissions by phenotype

Familial cylindromatosis Uncertain:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Familial multiple trichoepitheliomata Uncertain:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Brooke-Spiegler syndrome Uncertain:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

not specified Other:1

Sep 19, 2013

ITMI

Significance: not provided

Review Status: no classification provided

Collection Method: reference population

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.17
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.31
CADD	Benign	17
DANN	Benign	0.94
DEOGEN2	Benign	0.12	.;T;.;T;.;.;T;.
Eigen	Benign	-0.66
Eigen_PC	Benign	-0.47
FATHMM_MKL	Benign	0.23	N
LIST_S2	Benign	0.83	T;.;.;T;T;.;T;T
M_CAP	Benign	0.010	T
MetaRNN	Benign	0.045	T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.6	L;L;L;.;.;L;L;.
PhyloP100		1.8
PrimateAI	Benign	0.28	T
PROVEAN	Benign	-0.35	N;N;N;.;N;N;N;N
REVEL	Benign	0.11
Sift	Benign	0.49	T;T;T;.;T;T;T;T
Sift4G	Benign	0.50	T;T;T;T;T;T;T;T
Polyphen		0.010	B;B;B;.;.;B;B;.
Vest4		0.17
MutPred		0.31		Gain of ubiquitination at T222 (P = 0.006);Gain of ubiquitination at T222 (P = 0.006);Gain of ubiquitination at T222 (P = 0.006);Gain of ubiquitination at T222 (P = 0.006);Gain of ubiquitination at T222 (P = 0.006);Gain of ubiquitination at T222 (P = 0.006);Gain of ubiquitination at T222 (P = 0.006);Gain of ubiquitination at T222 (P = 0.006);
MVP		0.64
MPC		0.50
ClinPred		0.024	T
GERP RS		3.6
Varity_R		0.046
gMVP		0.47
Mutation Taster		=94/6	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs587778225; hg19: chr16-50785675; COSMIC: COSV100282786; COSMIC: COSV100282786;