17-61857167-GCATGCACAACAA-G

Position:

• chr17-61857167-GCATGCACAACAA-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM4

The NM_032043.3(BRIP1):​c.258_269delTTGTTGTGCATG​(p.Cys87_Cys90del) variant causes a disruptive inframe deletion change. The variant allele was found at a frequency of 0.0000632 in 1,613,878 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: 𝑓 0.000026 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000067 (0 hom.)
• Consequence: BRIP1 NM_032043.3 disruptive_inframe_deletion
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:13
• Conservation: PhyloP100: 5.04

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM4: Nonframeshift variant in NON repetitive region in NM_032043.3.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BRIP1	NM_032043.3	c.258_269delTTGTTGTGCATG	p.Cys87_Cys90del	disruptive_inframe_deletion	4/20	ENST00000259008.7	NP_114432.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BRIP1	ENST00000259008.7	c.258_269delTTGTTGTGCATG	p.Cys87_Cys90del	disruptive_inframe_deletion	4/20	1	NM_032043.3	ENSP00000259008.2

Frequencies

GnomAD3 genomes AF: 0.0000263 AC: 4 AN: 152134 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

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: 0.0000441

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000119 AC: 3 AN: 251446 Hom.: 0 AF XY: 0.0000147 AC XY: 2 AN XY: 135898

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000264

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000670 AC: 98 AN: 1461744 Hom.: 0 AF XY: 0.0000633 AC XY: 46 AN XY: 727182

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000881

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0000263 AC: 4 AN: 152134 Hom.: 0 Cov.: 32 AF XY: 0.0000404 AC XY: 3 AN XY: 74314

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.0000655

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000441

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000142 Hom.: 0

Bravo AF: 0.0000340

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:13

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	Jul 31, 2024	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Apr 18, 2024	Variant summary: BRIP1 c.258_269del12 (p.Cys87_Cys90del) results in an in-frame deletion that is predicted to remove 4 amino acids in the Helicase-like, DEXD box c2 type domain (IPR006554) from the encoded protein. The variant allele was found at a frequency of 1.2e-05 in 251446 control chromosomes. The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. c.258_269del12 has been reported in the literature in one individual affected with Breast Cancer and another individual undertaking inherited cancer gene testing (Yorczyk_2015, Seal_2006). These report(s) do not provide unequivocal conclusions about association of the variant with Breast Cancer. Co-occurrences with other pathogenic variant(s) have been reported (ATM c.5890A>T, p.Lys1964*), providing supporting evidence for a benign role (Bhai_2021). To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publications have been ascertained in the context of this evaluation (PMID: 34326862, 17033622, 25318351). ClinVar contains an entry for this variant (Variation ID: 182370). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Familial cancer of breast;C1836860:Fanconi anemia complementation group J Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Oct 17, 2022	This variant, c.258_269del, results in the deletion of 4 amino acid(s) of the BRIP1 protein (p.Cys87_Cys90del), but otherwise preserves the integrity of the reading frame. This variant is present in population databases (rs730881648, gnomAD 0.005%). This variant has been observed in individual(s) with a personal and/or family history of cancer (PMID: 25318351). ClinVar contains an entry for this variant (Variation ID: 182370). Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Jun 18, 2024	- -

not provided Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Aug 11, 2023	In-frame deletion of four amino acids in a non-repeat region; Observed in an individual with rectal cancer (PMID: 29596542); In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; This variant is associated with the following publications: (PMID: 25186949, 25318351, 29596542) -
Uncertain significance, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	Jul 20, 2021	- -

Hereditary cancer-predisposing syndrome Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Jan 30, 2024	The c.258_269del12 variant (also known as p.C87_C90del) is located in coding exon 3 of the BRIP1 gene. This variant results from an in-frame TTGTTGTGCATG deletion at nucleotide positions 258 to 269. This results in the in-frame deletion of four amino acid residues at codons 87 to 90. This variant has been reported in one of 105 individuals undergoing multigene panel testing for cancer susceptibility (Yorczyk A et al. Clin Genet, 2015 Sep;88:278-82). This variant was identified in a patient with breast cancer as part of a large Canadian cohort study of 2870 individuals (Bhai P et al. Front Genet, 2021 Jul;12:698595). This amino acid region is well conserved in available vertebrate species. Based on data from gnomAD, the c.258_269del12 allele has an overall frequency of 0.002121% (6/282842) total alleles studied. The highest observed frequency was 0.01181% (6/50800) of North-western European alleles. Based on the available evidence, the clinical significance of this alteration remains unclear. -
Uncertain significance, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Jun 13, 2023	This variant causes a deletion of 4 amino acids at codons 87-90 of the BRIP1 protein. To our knowledge, functional studies have not been reported for this variant. This variant has been reported in an individual with a personal and/or family history of cancer (PMID: 25318351). This variant has been identified in 6/282842 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. -

Familial cancer of breast Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Myriad Genetics, Inc.	Feb 28, 2023	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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Baylor Genetics	Mar 14, 2024	- -

Breast and/or ovarian cancer Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

Jun 01, 2023

- -

Fanconi anemia complementation group J Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Counsyl

Oct 31, 2016

- -

Ovarian neoplasm Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Counsyl

Oct 31, 2016

- -

Computational scores

Source: dbNSFP v4.3

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs730881648; hg19: chr17-59934528;