chr3-52406882-C-G

Variant names:

• chr3-52406882-C-G
• rs868339867
• NM_004656.4:c.606G>C

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PS1_Moderate PM2 PM5 PP3_Moderate PP5_Moderate

The NM_004656.4(BAP1):​c.606G>C​(p.Trp202Cys) variant causes a missense 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. Variant has been reported in ClinVar as Likely pathogenic (★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely pathogenic in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. W202R) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: BAP1 NM_004656.4 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 7.87
• Publications: 0 publications found

Genes affected

BAP1 (HGNC:950): (BRCA1 associated protein 1) This gene belongs to the ubiquitin C-terminal hydrolase subfamily of deubiquitinating enzymes that are involved in the removal of ubiquitin from proteins. The encoded enzyme binds to the breast cancer type 1 susceptibility protein (BRCA1) via the RING finger domain of the latter and acts as a tumor suppressor. In addition, the enzyme may be involved in regulation of transcription, regulation of cell cycle and growth, response to DNA damage and chromatin dynamics. Germline mutations in this gene may be associated with tumor predisposition syndrome (TPDS), which involves increased risk of cancers including malignant mesothelioma, uveal melanoma and cutaneous melanoma. [provided by RefSeq, May 2013]

BAP1 Gene-Disease associations (from GenCC):

• BAP1-related tumor predisposition syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Ambry Genetics, G2P, Orphanet, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• Kury-Isidor syndrome

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: Ambry Genetics, G2P
• renal cell carcinoma

  Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PS1: Transcript NM_004656.4 (BAP1) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in ClinVar as 485293
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr3-52406884-A-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 1399300.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.924
• PP5: Variant 3-52406882-C-G is Pathogenic according to our data. Variant chr3-52406882-C-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2450417.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BAP1	NM_004656.4	c.606G>C	p.Trp202Cys	missense_variant	Exon 8 of 17	ENST00000460680.6	NP_004647.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BAP1	ENST00000460680.6	c.606G>C	p.Trp202Cys	missense_variant	Exon 8 of 17	1	NM_004656.4	ENSP00000417132.1
BAP1	ENST00000296288.9	c.606G>C	p.Trp202Cys	missense_variant	Exon 8 of 17	5		ENSP00000296288.5
BAP1	ENST00000471532.5	n.321G>C		non_coding_transcript_exon_variant	Exon 4 of 5	5
BAP1	ENST00000483984.5	n.463G>C		non_coding_transcript_exon_variant	Exon 7 of 7	3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary cancer-predisposing syndrome Pathogenic:1

Jan 11, 2023

Ambry Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.W202C variant (also known as c.606G>C), located in coding exon 8 of the BAP1 gene, results from a G to C substitution at nucleotide position 606. The tryptophan at codon 202 is replaced by cysteine, an amino acid with highly dissimilar properties. This amino acid change has been observed in individuals with a personal and/or family history that is consistent with BAP1-related disease (Ambry internal data; Personal communication; De Rienzo A et al. Cancer Res, 2016 Jan;76:319-28). A close match alteration at this same codon (c.604T>C, p.W202R) has been observed in a family with BAP1-associated phenotype (Kittaneh M et al. J Transl Med 2018 Jul;16(1):194). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. This variant is considered to be rare based on population cohorts in the Genome Aggregation Database (gnomAD). Based on the majority of available evidence to date, this variant is likely to be pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.36	D
BayesDel_noAF	Pathogenic	0.28
CADD	Pathogenic	32
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.61	D;.
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	1.0
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Pathogenic	0.99	D;D
M_CAP	Uncertain	0.15	D
MetaRNN	Pathogenic	0.92	D;D
MetaSVM	Uncertain	0.22	D
MutationAssessor	Pathogenic	4.0	H;.
PhyloP100		7.9
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-13	D;D
REVEL	Pathogenic	0.73
Sift	Pathogenic	0.0	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;.
Vest4		0.96
MutPred		0.74		Loss of catalytic residue at W202 (P = 0.038);Loss of catalytic residue at W202 (P = 0.038);
MVP		0.83
MPC		3.2
ClinPred		1.0	D
GERP RS		6.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.98
gMVP		1.0
Mutation Taster		=11/89	disease causing

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: rs868339867; hg19: chr3-52440898;