rs121908389

Variant names:

• chr16-50791689-A-G
• rs121908389
• NM_001378743.1:c.2240A>G

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM2 PP3_Moderate PP5

The NM_001378743.1(CYLD):​c.2240A>G​(p.Glu747Gly) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 15/26 in silico tools predict a damaging outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 33)
• Consequence: CYLD NM_001378743.1 missense, splice_region
• Scores: Splicing: ADA: 0.9999
• Clinical Significance: Pathogenic no assertion criteria provided P:2
• Conservation: PhyloP100: 8.89
• Publications: 8 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-AS2 (HGNC:56848): (CYLD antisense RNA 2)

ACMG classification

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
• PP5: Variant 16-50791689-A-G is Pathogenic according to our data. Variant chr16-50791689-A-G is described in ClinVar as Pathogenic. ClinVar VariationId is 5258.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001378743.1. 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
	CYLD	NM_001378743.1	MANE Select	c.2240A>G	p.Glu747Gly	missense splice_region	Exon 15 of 19	NP_001365672.1	Q9NQC7-1
	CYLD	NM_015247.3		c.2240A>G	p.Glu747Gly	missense splice_region	Exon 16 of 20	NP_056062.1	Q9NQC7-1
	CYLD	NM_001042355.2		c.2231A>G	p.Glu744Gly	missense splice_region	Exon 14 of 18	NP_001035814.1	Q9NQC7-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CYLD	ENST00000427738.8	TSL:5 MANE Select	c.2240A>G	p.Glu747Gly	missense splice_region	Exon 15 of 19	ENSP00000392025.3	Q9NQC7-1
	CYLD	ENST00000398568.6	TSL:1	c.2231A>G	p.Glu744Gly	missense splice_region	Exon 14 of 18	ENSP00000381574.2	Q9NQC7-2
	CYLD	ENST00000569418.5	TSL:1	c.2231A>G	p.Glu744Gly	missense splice_region	Exon 14 of 18	ENSP00000457576.1	Q9NQC7-2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Brooke-Spiegler syndrome (1)
1	-	-	Familial multiple trichoepitheliomata (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.92
BayesDel_addAF	Pathogenic	0.27	D
BayesDel_noAF	Pathogenic	0.15
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Benign	0.36	T
Eigen	Pathogenic	0.75
Eigen_PC	Pathogenic	0.74
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.86	D
M_CAP	Uncertain	0.12	D
MetaRNN	Pathogenic	0.86	D
MetaSVM	Benign	-0.64	T
MutationAssessor	Uncertain	2.4	M
PhyloP100		8.9
PrimateAI	Pathogenic	0.83	D
PROVEAN	Pathogenic	-6.3	D
REVEL	Pathogenic	0.74
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.0030	D
Polyphen		0.98	D
Vest4		0.77
MutPred		0.69		Gain of sheet (P = 0.0043)
MVP		0.87
MPC		2.4
ClinPred		1.0	D
GERP RS		5.4
Varity_R		0.72
gMVP		0.87
Mutation Taster		=3/97	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.98
SpliceAI score (max)		0.69		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.69		Position offset: 1

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs121908389; hg19: chr16-50825600;