chr17-58720794-TTGCTTGTTCC-T

Position:

• chr17-58720794-TTGCTTGTTCC-T

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The ENST00000337432.9(RAD51C):​c.890_899del​(p.Leu297HisfsTer2) variant causes a frameshift change. The variant allele was found at a frequency of 0.000000685 in 1,459,976 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. L296L) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: RAD51C ENST00000337432.9 frameshift
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:9
• Conservation: PhyloP100: 4.17

Genes affected

RAD51C (HGNC:9820): (RAD51 paralog C) This gene is a member of the RAD51 family. RAD51 family members are highly similar to bacterial RecA and Saccharomyces cerevisiae Rad51 and are known to be involved in the homologous recombination and repair of DNA. This protein can interact with other RAD51 paralogs and is reported to be important for Holliday junction resolution. Mutations in this gene are associated with Fanconi anemia-like syndrome. This gene is one of four localized to a region of chromosome 17q23 where amplification occurs frequently in breast tumors. Overexpression of the four genes during amplification has been observed and suggests a possible role in tumor progression. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2013]

ACMG classification

Verdict is Pathogenic. Variant got 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 17-58720794-TTGCTTGTTCC-T is Pathogenic according to our data. Variant chr17-58720794-TTGCTTGTTCC-T is described in ClinVar as [Pathogenic]. Clinvar id is 484744.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RAD51C	NM_058216.3	c.890_899del	p.Leu297HisfsTer2	frameshift_variant	6/9	ENST00000337432.9	NP_478123.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RAD51C	ENST00000337432.9	c.890_899del	p.Leu297HisfsTer2	frameshift_variant	6/9	1	NM_058216.3	ENSP00000336701	P2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1459976 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 726400

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: 0.00

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 31

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:9

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Hereditary cancer-predisposing syndrome Pathogenic:3

Pathogenic, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Oct 01, 2023	This variant deletes 10 nucleotides in exon 6 of the RAD51C gene, creating a frameshift and premature translation stop signal. This variant is expected to result in an absent or non-functional protein product. This variant has been reported in one individual each affected with ovarian cancer (PMID: 29255180), breast and ovarian cancer (PMID: 33326660), bladder and prostate cancer (PMID: 29659569) and an individual affected with Lynch syndrome-associated cancer and/or polyps (PMID: 25980754). This variant has not been identified in the general population by the Genome Aggregation Database (gnomAD). Loss of RAD51C function is a known mechanism of disease (clinicalgenome.org). Based on the available evidence, this variant is classified as Pathogenic. -
Pathogenic, criteria provided, single submitter	clinical testing	Ambry Genetics	May 03, 2023	The c.890_899del10 pathogenic mutation, located in coding exon 6 of the RAD51C gene, results from a deletion of 10 nucleotides at nucleotide positions 890 to 899, causing a translational frameshift with a predicted alternate stop codon (p.L297Hfs*2). This alteration has been identified in a cohort of 2649 consecutive cases of breast and/or ovarian cancer and in an individual diagnosed with prostate cancer (Golmard L et al. Eur. J. Hum. Genet., 2017 12;25:1345-1353; Paulo P et al. PLoS Genet., 2018 04;14:e1007355). 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. -
Pathogenic, criteria provided, single submitter	curation	Sema4, Sema4	Dec 20, 2021	- -

Fanconi anemia complementation group O Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Mendelics	May 28, 2019	- -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Nov 24, 2023	This sequence change creates a premature translational stop signal (p.Leu297Hisfs*2) in the RAD51C gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in RAD51C are known to be pathogenic (PMID: 20400964, 21990120, 24800917, 29278735). This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individual(s) with ovarian cancer (PMID: 25980754, 29255180, 29659569). ClinVar contains an entry for this variant (Variation ID: 484744). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. For these reasons, this variant has been classified as Pathogenic. -

Breast-ovarian cancer, familial, susceptibility to, 3 Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Mar 22, 2024	- -
Pathogenic, criteria provided, single submitter	clinical testing	Myriad Genetics, Inc.	Jan 03, 2024	This variant is considered pathogenic. This variant creates a frameshift predicted to result in premature protein truncation. -

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Jun 16, 2023

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; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 25980754, Monteiro2019[MtgAbstract], 29659569, Cardoso2018[Thesis], 27535533, Teixeira2023[preprint], 33258288, 35264596, 33326660, 29255180, 36119527) -

Hereditary breast ovarian cancer syndrome Pathogenic:1

Pathogenic, criteria provided, single submitter

research

Molecular Oncology Research Center, Barretos Cancer Hospital

Aug 01, 2020

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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: rs1555602141; hg19: chr17-56798155;