3-52403493-C-G

Variant names:

• chr3-52403493-C-G
• rs759448397
• NM_004656.4:c.1652G>C

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_004656.4(BAP1):​c.1652G>C​(p.Arg551Pro) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R551H) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: BAP1 NM_004656.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.05
• 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: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BAP1	NM_004656.4	c.1652G>C	p.Arg551Pro	missense_variant	Exon 13 of 17	ENST00000460680.6	NP_004647.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BAP1	ENST00000460680.6	c.1652G>C	p.Arg551Pro	missense_variant	Exon 13 of 17	1	NM_004656.4	ENSP00000417132.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

BAP1-related tumor predisposition syndrome Uncertain:1

Oct 30, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine, which is basic and polar, with proline, which is neutral and non-polar, at codon 551 of the BAP1 protein (p.Arg551Pro). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with BAP1-related conditions. Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed for this missense variant. However, the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on BAP1 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Uncertain	0.13	D
BayesDel_noAF	Uncertain	-0.060
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.071	T;.;T
Eigen	Uncertain	0.48
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.94	D;D;D
M_CAP	Benign	0.028	D
MetaRNN	Uncertain	0.71	D;D;D
MetaSVM	Benign	-0.77	T
MutationAssessor	Benign	0.69	N;.;.
PhyloP100		4.0
PrimateAI	Pathogenic	0.83	D
PROVEAN	Benign	-1.9	N;N;N
REVEL	Benign	0.21
Sift	Uncertain	0.0030	D;D;D
Sift4G	Uncertain	0.059	T;T;D
Polyphen		0.95	P;.;.
Vest4		0.80
MutPred		0.55		Loss of helix (P = 0.0068);.;.;
MVP		0.83
MPC		1.0
ClinPred		0.82	D
GERP RS		5.9
PromoterAI		0.0096	Neutral
Varity_R		0.51
gMVP		0.69
Mutation Taster		=46/54	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs759448397; hg19: chr3-52437509;