NM_032043.3:c.1201_1204dupTGTG

Variant names:

• chr17-61799235-G-GCACA
• rs730881647
• NM_032043.3:c.1201_1204dupTGTG

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_032043.3(BRIP1):​c.1201_1204dupTGTG​(p.Ala402ValfsTer21) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. A402A) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: BRIP1 NM_032043.3 frameshift
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:6
• Conservation: PhyloP100: 7.09
• Publications: 5 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: Pathogenic. The variant received 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 17-61799235-G-GCACA is Pathogenic according to our data. Variant chr17-61799235-G-GCACA is described in ClinVar as Pathogenic. ClinVar VariationId is 182369.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_032043.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BRIP1	NM_032043.3	MANE Select	c.1201_1204dupTGTG	p.Ala402ValfsTer21	frameshift	Exon 9 of 20	NP_114432.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BRIP1	ENST00000259008.7	TSL:1 MANE Select	c.1201_1204dupTGTG	p.Ala402ValfsTer21	frameshift	Exon 9 of 20	ENSP00000259008.2
	BRIP1	ENST00000682453.1		c.1201_1204dupTGTG	p.Ala402ValfsTer21	frameshift	Exon 10 of 21	ENSP00000506943.1
	BRIP1	ENST00000683039.1		c.1201_1204dupTGTG	p.Ala402ValfsTer21	frameshift	Exon 10 of 21	ENSP00000508303.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:6

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Familial cancer of breast Pathogenic:2

Jun 01, 2023

Myriad Genetics, Inc.

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered pathogenic. This variant creates a frameshift predicted to result in premature protein truncation.

Mar 10, 2024

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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

Sep 07, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

ClinVar contains an entry for this variant (Variation ID: 182369). This sequence change creates a premature translational stop signal (p.Ala402Valfs*21) in the BRIP1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in BRIP1 are known to be pathogenic (PMID: 16116423, 17033622, 21964575). This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individual(s) with skin and ovarian cancer (PMID: 26681312). For these reasons, this variant has been classified as Pathogenic.

not provided Pathogenic:1

Oct 18, 2019

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Frameshift variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a known mechanism of disease; Observed in an individual with ovarian cancer (Carter 2018); Not observed in large population cohorts (Lek 2016); This variant is associated with the following publications: (PMID: 26681312, 30322717)

Familial ovarian cancer Pathogenic:1

Aug 23, 2018

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Hereditary cancer-predisposing syndrome Pathogenic:1

Nov 02, 2023

Ambry Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1201_1204dupTGTG pathogenic mutation, located in coding exon 8 of the BRIP1 gene, results from a duplication of TGTG at nucleotide positions 1201 to 1204, causing a translational frameshift with a predicted alternate stop codon (p.A402Vfs*21). This alteration was identified in 1/10030 consecutive patients referred for evaluation by an NGS hereditary cancer panel; this patient had a history of ovarian and skin cancer (Susswein LR et al. Genet. Med. 2016 08;18(8):823-32). In addition to the clinical data presented in the literature, this alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. As such, this alteration is interpreted as a disease-causing mutation.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		7.1
Mutation Taster		=0/200	disease causing (ClinVar)

Splicing

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

Other links and lift over

dbSNP: rs730881647; hg19: chr17-59876596;