chr17-58734187-C-T

Variant names:

Variant summary

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

The NM_058216.3(RAD51C):c.1096C>T(p.Arg366Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000992 in 1,612,968 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R366Q) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000096 ( 0 hom. )

Consequence

RAD51C
NM_058216.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:10

Conservation

PhyloP100: 3.04

Variant links:

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]

RAD51C links:

LOC105371843 (HGNC:):

LOC105371843 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RAD51C	NM_058216.3 link	c.1096C>T	p.Arg366Trp	missense_variant	Exon 9 of 9	ENST00000337432.9	NP_478123.1	O43502-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RAD51C	ENST00000337432.9 link	c.1096C>T	p.Arg366Trp	missense_variant	Exon 9 of 9	1	NM_058216.3	ENSP00000336701.4		O43502-1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152100

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000656

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000943

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000401

AC:

AN:

249630

Hom.:

AF XY:

0.00000742

AC XY:

AN XY:

134854

show subpopulations

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:

0.00000886

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000958

AC:

AN:

1460868

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

726616

show subpopulations

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:

0.0000187

Gnomad4 NFE exome

AF:

0.0000108

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152100

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74310

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000656

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000943

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:10

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hereditary cancer-predisposing syndrome

Uncertain:3

Sep 03, 2024

Molecular Diagnostics Laboratory, Catalan Institute of Oncology

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

PM2_Supporting, BP4 c.1096C>T, located in exon 9 of the RAD51C gene, is predicted to result in the substitution of arginine by tryptophan at codon 366, p.(Arg366Trp). This variant is found in 2/266660 alleles at a frequency of 0.0007% in all populations and in 1/117410 alleles in European non-Finnish sub-population, in the gnomAD v2.1.1 database, non-cancer dataset (PM2_supporting). The SpliceAI algorithm predicts no significant impact on splicing. The REVEL meta-predictor score for this variant (0.248) suggests that it does not affect the protein function according to Pejaver 2022 thresholds (PMID: 36413997) (BP4). A functional study revealed that expression of c.1096C>T mutated RAD51C cDNAs, transferred via retroviral vectors in Rad51c-/- DT40 cells and in human RAD51C-mutated fibroblasts, was associated with intermediate cellular survival, as well as normal RAD51 foci formation in response to MMC exposure, respectively (PMID: 20400964). Moreover, this variant has been reported in both cancer patients and healthy individuals. This variant has been reported in the ClinVar database (9x uncertain significance) and in the LOVD database (1x uncertain significance, 1x not classified). Based on currently available information, the variant c.1096C>T should be considered an uncertain significance variant. -

Aug 02, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.R366W variant (also known as c.1096C>T), located in coding exon 9 of the RAD51C gene, results from a C to T substitution at nucleotide position 1096. The arginine at codon 366 is replaced by tryptophan, an amino acid with dissimilar properties. This alteration has been reported in one Danish female diagnosed with breast cancer at age 34 and having a family history of prostate cancer and melanoma in first degree relatives (Jønson L et al. Breast Cancer Res. Treat. 2016 Jan;155:215-22). In one study, a different missense alteration at this same codon, (p.R366Q) was shown to partially segregate with disease in 1 family of a cohort of 480 families with breast and ovarian cancer, and was not identified in any of 620 families with breast cancer only, nor in 2912 healthy controls (Meindl A et al. Nat. Genet. 2010 May;42:410-4). In the same report, in vitro functional studies using p.R366Q mutant protein, demonstrated an intermediate defect of DNA repair activity in Rad51c-deficient DT40 chicken cells and little to no effect on localization to repair foci in response to DNA damaging agents in human RAD51D p.R366Q-mutated fibroblasts. This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Jan 05, 2022

Color Diagnostics, LLC DBA Color Health

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This missense variant replaces arginine with tryptophan at codon 366 of the RAD51C protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been performed for this variant. This variant has been reported in an individual affected with breast cancer (PMID: 26740214). In a large breast cancer case-control study, this variant has been observed in 0/60466 cases and 3/53458 controls (PMID: 33471991 - Leiden Open Variation Database DB-ID RAD51C_000075). This variant has been identified in 2/281028 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. -

not specified

Uncertain:2

Mar 04, 2025

Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Aug 13, 2018

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

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: RAD51C c.1096C>T (p.Arg366Trp) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 3.2e-05 in 30974 control chromosomes (gnomAD). The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. The variant, c.1096C>T, has been reported in the literature in individuals affected with Hereditary Breast and Ovarian Cancer (Jonson_2016). These data do not allow any conclusion about variant significance. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Four clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance. -

not provided

Uncertain:2

Nov 01, 2022

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Observed in an individual with breast cancer (Jnson et al., 2016); This variant is associated with the following publications: (PMID: 22167183, 26740214, 14704354, 12966089) -

May 15, 2018

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Fanconi anemia complementation group O;C3150659:Breast-ovarian cancer, familial, susceptibility to, 3

Uncertain:1

Nov 03, 2021

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Fanconi anemia complementation group O

Uncertain:1

Jan 26, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 366 of the RAD51C protein (p.Arg366Trp). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This missense change has been observed in individual(s) with breast and/or ovarian cancer (PMID: 26740214). ClinVar contains an entry for this variant (Variation ID: 142416). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. 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. -

Breast-ovarian cancer, familial, susceptibility to, 3

Uncertain:1

Mar 05, 2024

Baylor Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.044

BayesDel_noAF

Benign

-0.30

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.25

Eigen

Uncertain

0.41

Eigen_PC

Uncertain

0.31

FATHMM_MKL

Uncertain

0.76

LIST_S2

Uncertain

0.88

M_CAP

Benign

0.047

MetaRNN

Uncertain

0.48

MetaSVM

Benign

-0.67

MutationAssessor

Uncertain

2.3

PrimateAI

Uncertain

0.56

PROVEAN

Uncertain

-2.4

REVEL

Benign

0.25

Sift

Uncertain

0.0040

Sift4G

Uncertain

0.0050

Polyphen

1.0

Vest4

0.45

MutPred

0.33

Gain of sheet (P = 0.0344);

MVP

0.86

MPC

0.82

ClinPred

0.82

GERP RS

4.2

Varity_R

0.073

gMVP

0.42

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over