17-61857067-T-C

Variant names:

• chr17-61857067-T-C
• rs45617634
• NM_032043.3:c.370A>G

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_032043.3(BRIP1):​c.370A>G​(p.Thr124Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000173 in 1,614,044 control chromosomes in the GnomAD database, including 1 homozygotes. 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 Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T124P) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.000033 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000016 (1 hom.)
• Consequence: BRIP1 NM_032043.3 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:8 B:2
• Conservation: PhyloP100: -1.82
• Publications: 4 publications found

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

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.04904431).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BRIP1	NM_032043.3	c.370A>G	p.Thr124Ala	missense_variant	Exon 4 of 20	ENST00000259008.7	NP_114432.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
BRIP1	ENST00000259008.7	c.370A>G	p.Thr124Ala	missense_variant	Exon 4 of 20	1	NM_032043.3	ENSP00000259008.2

Frequencies

GnomAD3 genomes AF: 0.0000328 AC: 5 AN: 152222 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

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: 0.0000294

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000199 AC: 5 AN: 251408 AF XY: 0.0000294

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000116

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000879

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000157 AC: 23 AN: 1461704 Hom.: 1 Cov.: 31 AF XY: 0.0000179 AC XY: 13 AN XY: 727182

African (AFR) AF: 0.00 AC: 0 AN: 33476

American (AMR) AF: 0.0000671 AC: 3 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39666

South Asian (SAS) AF: 0.0000580 AC: 5 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53418

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5762

European-Non Finnish (NFE) AF: 0.0000117 AC: 13 AN: 1111884

Other (OTH) AF: 0.0000331 AC: 2 AN: 60392

GnomAD4 genome AF: 0.0000328 AC: 5 AN: 152340 Hom.: 0 Cov.: 32 AF XY: 0.0000537 AC XY: 4 AN XY: 74492

African (AFR) AF: 0.0000240 AC: 1 AN: 41582

American (AMR) AF: 0.000131 AC: 2 AN: 15306

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

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

South Asian (SAS) AF: 0.00 AC: 0 AN: 4832

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10614

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000294 AC: 2 AN: 68030

Other (OTH) AF: 0.00 AC: 0 AN: 2114

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000227

ExAC AF: 0.00000824 AC: 1

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:8 Benign:2

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:1 Benign:2

Oct 30, 2018

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Jan 28, 2025

Color Diagnostics, LLC DBA Color Health

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This missense variant replaces threonine with alanine at codon 124 of the BRIP1 protein. Computational prediction suggests that this variant may not impact protein structure and function. To our knowledge, functional studies have not been reported for this variant. This variant has been reported in a family with hereditary breast cancer (PMID: 34570441) as well as in an individual affected with Lynch syndrome-associated cancer and/or polyps (PMID: 25980754). In an international breast cancer case-control meta-analysis, this variant was detected in 6/60466 cases and 2/53461 unaffected controls (PMID: 33471991). This variant has been identified in 7/282800 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -

Sep 27, 2021

Institute for Biomarker Research, Medical Diagnostic Laboratories, L.L.C.

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

not provided Uncertain:2

Oct 23, 2023

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The BRIP1 c.370A>G (p.Thr124Ala) variant has been reported in the published literature in an individual with a Lynch Syndrome associated cancer (PMID: 25980754 (2015)). In a large-scale breast cancer association study, the variant was observed in individuals with breast cancer as well as in unaffected individuals (PMID: 33471991 (2021), see also LOVD (http://databases.lovd.nl/shared/genes/BRIP1)). The frequency of this variant in the general population, 0.00011 (4/35434 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is uninformative in the assessment of its pathogenicity. Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded predictions that this variant is benign. Based on the available information, we are unable to determine the clinical significance of this variant. -

Oct 11, 2023

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant does not alter protein structure/function; Observed in individuals with breast cancer or a personal history of a Lynch syndrome associated cancer and/or polyps (Yurgelun et al., 2015; Dong et al., 2021); This variant is associated with the following publications: (PMID: 25980754, 17033622, 32703503, 34570441) -

Familial cancer of breast;C1836860:Fanconi anemia complementation group J Uncertain:1

Jan 29, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces threonine, which is neutral and polar, with alanine, which is neutral and non-polar, at codon 124 of the BRIP1 protein (p.Thr124Ala). This variant is present in population databases (rs45617634, gnomAD 0.01%). This missense change has been observed in individual(s) with suspected Lynch syndrome (PMID: 17033622, 25980754, 34570441). ClinVar contains an entry for this variant (Variation ID: 182371). 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) indicates that this missense variant is not expected to disrupt BRIP1 protein function with a negative predictive value of 95%. 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. -

BRIP1-related disorder Uncertain:1

Aug 09, 2024

PreventionGenetics, part of Exact Sciences

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

The BRIP1 c.370A>G variant is predicted to result in the amino acid substitution p.Thr124Ala. This variant has been reported in individuals with breast cancer and suspected Lynch syndrome (Breast Cancer Association Consortium et al. 2021. PubMed ID: 33471991; Supplementary Table 2, Yurgelun et al. 2015. PubMed ID: 25980754). However, it has also been reported in unaffected control individuals in breast cancer studies (Breast Cancer Association Consortium et al. 2021. PubMed ID: 33471991; Supplementary Table 2, Seal et al. 2006. PubMed ID: 17033622). This variant is reported in 0.011% of alleles in individuals of Latino descent in gnomAD and has conflicting interpretations regarding its pathogenicity in ClinVar, ranging from likely benign to uncertain (https://www.ncbi.nlm.nih.gov/clinvar/variation/182371/). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Ovarian cancer Uncertain:1

Sep 16, 2016

Counsyl

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -

Fanconi anemia complementation group J Uncertain:1

Sep 16, 2016

Counsyl

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -

Familial cancer of breast Uncertain:1

Feb 28, 2023

Myriad Genetics, Inc.

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is classified as a variant of uncertain significance as there is insufficient evidence to determine its impact on protein function and/or cancer risk. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.057
BayesDel_addAF	Benign	-0.50	T
BayesDel_noAF	Benign	-0.73
CADD	Benign	0.0080
DANN	Benign	0.30
DEOGEN2	Benign	0.12	T;.
Eigen	Benign	-1.8
Eigen_PC	Benign	-1.9
FATHMM_MKL	Benign	0.012	N
LIST_S2	Benign	0.32	T;T
M_CAP	Benign	0.0098	T
MetaRNN	Benign	0.049	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.92	L;L
PhyloP100		-1.8
PrimateAI	Benign	0.20	T
PROVEAN	Benign	-0.82	N;.
REVEL	Benign	0.048
Sift	Benign	0.89	T;.
Sift4G	Benign	0.88	T;T
Polyphen		0.0	B;.
Vest4		0.10
MVP		0.25
MPC		0.16
ClinPred		0.013	T
GERP RS		-10
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.015
gMVP		0.18
Mutation Taster		=96/4	polymorphism

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: rs45617634; hg19: chr17-59934428;