rs273902770

chr17-43045810-CAG-C

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP6_Very_Strong

The NM_007294.4(BRCA1):c.5468-10_5468-9del variant causes a splice polypyrimidine tract, intron change. The variant allele was found at a frequency of 0.0000149 in 1,613,810 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000016 (0 hom.)
• Consequence: BRCA1 NM_007294.4 splice_polypyrimidine_tract, intron
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts U:1 B:6
• Conservation: PhyloP100: 4.98

Genes affected

BRCA1 (HGNC:1100): (BRCA1 DNA repair associated) This gene encodes a 190 kD nuclear phosphoprotein that plays a role in maintaining genomic stability, and it also acts as a tumor suppressor. The BRCA1 gene contains 22 exons spanning about 110 kb of DNA. The encoded protein combines with other tumor suppressors, DNA damage sensors, and signal transducers to form a large multi-subunit protein complex known as the BRCA1-associated genome surveillance complex (BASC). This gene product associates with RNA polymerase II, and through the C-terminal domain, also interacts with histone deacetylase complexes. This protein thus plays a role in transcription, DNA repair of double-stranded breaks, and recombination. Mutations in this gene are responsible for approximately 40% of inherited breast cancers and more than 80% of inherited breast and ovarian cancers. Alternative splicing plays a role in modulating the subcellular localization and physiological function of this gene. Many alternatively spliced transcript variants, some of which are disease-associated mutations, have been described for this gene, but the full-length natures of only some of these variants has been described. A related pseudogene, which is also located on chromosome 17, has been identified. [provided by RefSeq, May 2020]

ACMG classification

Verdict is Benign. Variant got -8 ACMG points.

• BP6: Variant 17-43045810-CAG-C is Benign according to our data. Variant chr17-43045810-CAG-C is described in ClinVar as [Likely_benign]. Clinvar id is 91652.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BRCA1	NM_007294.4	c.5468-10_5468-9del		splice_polypyrimidine_tract_variant, intron_variant		ENST00000357654.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BRCA1	ENST00000357654.9	c.5468-10_5468-9del		splice_polypyrimidine_tract_variant, intron_variant		1	NM_007294.4	P4

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 152064 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: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000878 AC: 22 AN: 250484 Hom.: 0 AF XY: 0.0000591 AC XY: 8 AN XY: 135476

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000549

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: 0.00

Gnomad OTH exome AF: 0.000489

GnomAD4 exome AF: 0.0000157 AC: 23 AN: 1461746 Hom.: 0 AF XY: 0.0000124 AC XY: 9 AN XY: 727168

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.000447

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: 0.00

Gnomad4 OTH exome AF: 0.0000497

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 152064 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74266

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: 0.00

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.0000340

ClinVar

Significance: Benign/Likely benign

Submissions summary: Uncertain:1 Benign:6

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Breast-ovarian cancer, familial, susceptibility to, 1 Uncertain:1 Benign:1

Benign, no assertion criteria provided	clinical testing	Sharing Clinical Reports Project (SCRP)	Oct 27, 2011	- -
Uncertain significance, no assertion criteria provided	clinical testing	Breast Cancer Information Core (BIC) (BRCA1)	Dec 23, 2003	- -

not provided Benign:2

Benign, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	Oct 29, 2022	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Aug 09, 2019	- -

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Feb 04, 2022

Variant summary: BRCA1 c.5468-10_5468-9delCT removes two nucleotides located close to a canonical splice site and therefore it could affect mRNA splicing, leading to a significantly altered protein sequence. 4/4 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 8.6e-05 in 267346 control chromosomes, predominantly at a frequency of 0.00057 within the Latino subpopulation in the gnomAD database. This frequency is somewhat lower than estimated maximum expected for a pathogenic variant in BRCA1 causing Hereditary Breast and Ovarian Cancer Syndrome (0.001), however, the variant can still represent a benign polymorphism. The variant, c.5468-10_5468-9delCT, has been reported in the literature in an individual of Hispanic ancestry, who was affected with breast cancer (Vogel_2007), but without evidence for causality. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Four other ClinVar submitters have assessed the variant since 2014: two have classified the variant as likely benign and two as benign. Based on the evidence outlined above, the variant was classified as likely benign. -

Hereditary cancer-predisposing syndrome Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Color Diagnostics, LLC DBA Color Health

Nov 09, 2017

- -

Hereditary breast ovarian cancer syndrome Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Jan 10, 2024

- -

Computational scores

Source: dbNSFP v4.3

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

LitVar

Other links and lift over

dbSNP: rs273902770; hg19: chr17-41197827;