Genetic Variant BRIP1:p.Gly481Ser (chr17-61793629-C-T) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_032043.3(BRIP1):c.1441G>A(p.Gly481Ser) variant causes a missense change. 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 Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G481D) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

BRIP1
NM_032043.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 6.97

Publications

4 publications found

Variant links:

Genes affected

BRIP1 (HGNC:20473): (BRCA1 interacting helicase 1) The protein encoded by this gene is a member of the RecQ DEAH helicase family and interacts with the BRCT repeats of breast cancer, type 1 (BRCA1). The bound complex is important in the normal double-strand break repair function of breast cancer, type 1 (BRCA1). This gene may be a target of germline cancer-inducing mutations. [provided by RefSeq, Jul 2008]

BRIP1 Gene-Disease associations (from GenCC):

familial ovarian cancer
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
Fanconi anemia
Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, Illumina
Fanconi anemia complementation group J
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, ClinGen, Ambry Genetics, Labcorp Genetics (formerly Invitae)
hereditary breast carcinoma
Inheritance: AD Classification: STRONG, LIMITED, NO_KNOWN Submitted by: ClinGen, Genomics England PanelApp, Ambry Genetics, Labcorp Genetics (formerly Invitae)
colorectal adenoma
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

BRIP1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.854

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BRIP1	NM_032043.3 link	c.1441G>A	p.Gly481Ser	missense_variant	Exon 10 of 20	ENST00000259008.7	NP_114432.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BRIP1	ENST00000259008.7 link	c.1441G>A	p.Gly481Ser	missense_variant	Exon 10 of 20	1	NM_032043.3	ENSP00000259008.2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

1455952

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

723904

African (AFR)

AF:

0.00

AC:

AN:

33378

American (AMR)

AF:

0.00

AC:

AN:

44240

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25960

East Asian (EAS)

AF:

0.00

AC:

AN:

39472

South Asian (SAS)

AF:

0.00

AC:

AN:

85492

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52926

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5524

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1108848

Other (OTH)

AF:

0.00

AC:

AN:

60112

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Familial cancer of breast;C1836860:Fanconi anemia complementation group J

Uncertain:1

Oct 03, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces glycine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 481 of the BRIP1 protein (p.Gly481Ser). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with BRIP1-related conditions. ClinVar contains an entry for this variant (Variation ID: 965180). 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 BRIP1 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.

Hereditary cancer-predisposing syndrome

Uncertain:1

Apr 01, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.G481S variant (also known as c.1441G>A), located in coding exon 9 of the BRIP1 gene, results from a G to A substitution at nucleotide position 1441. The glycine at codon 481 is replaced by serine, an amino acid with similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear.

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.47

BayesDel_addAF

Pathogenic

0.28

BayesDel_noAF

Pathogenic

0.17

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.42

T;.

Eigen

Pathogenic

0.69

Eigen_PC

Uncertain

0.65

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.90

D;D

M_CAP

Uncertain

0.28

MetaRNN

Pathogenic

0.85

D;D

MetaSVM

Uncertain

0.34

MutationAssessor

Uncertain

2.8

M;M

PhyloP100

7.0

PrimateAI

Uncertain

0.63

PROVEAN

Uncertain

-4.0

D;.

REVEL

Pathogenic

0.67

Sift

Uncertain

0.0090

D;.

Sift4G

Uncertain

0.020

D;D

Vest4

0.84

ClinPred

1.0

GERP RS

5.2

Varity_R

0.56

gMVP

0.70

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