17-58692714-G-T

Variant names:

• chr17-58692714-G-T
• rs777554369
• NM_058216.3:c.71G>T

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM1 PM2 PP3

The NM_058216.3(RAD51C):​c.71G>T​(p.Arg24Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,886 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 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. R24W) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: RAD51C NM_058216.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 4.58
• Publications: 3 publications found

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 Gene-Disease associations (from GenCC):

• breast-ovarian cancer, familial, susceptibility to, 3

  Inheritance: AD Classification: STRONG, LIMITED Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Ambry Genetics
• Fanconi anemia complementation group O

  Inheritance: AR Classification: STRONG, MODERATE, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics, ClinGen
• hereditary breast ovarian cancer syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Fanconi anemia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• hereditary breast carcinoma

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 8 benign, 15 uncertain in NM_058216.3
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.806

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RAD51C	NM_058216.3	c.71G>T	p.Arg24Leu	missense_variant	Exon 1 of 9	ENST00000337432.9	NP_478123.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RAD51C	ENST00000337432.9	c.71G>T	p.Arg24Leu	missense_variant	Exon 1 of 9	1	NM_058216.3	ENSP00000336701.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461886 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727240

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1112012

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:1

Aug 11, 2016

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is denoted RAD51C c.71G>T at the cDNA level, p.Arg24Leu (R24L) at the protein level, and results in the change of an Arginine to a Leucine (CGG>CTG). This variant has been reported in at least one individual with lung cancer (Lu 2015). RAD51C Arg24Leu was not observed in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, suggesting it is not a common benign variant in these populations. Since Arginine and Leucine differ in polarity, charge, size or other properties, this is considered a non-conservative amino acid substitution. RAD51C Arg24Leu occurs at a position that is not conserved and is located in the region required for Holliday junction resolution activity (Uniprot). In silico analyses are inconsistent regarding the effect this variant may have on protein structure and function. Based on currently available evidence, it is unclear whether RAD51C Arg24Leu is a pathogenic or benign variant. We consider it to be a variant of uncertain significance. -

Fanconi anemia complementation group O Uncertain:1

Mar 24, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

ClinVar contains an entry for this variant (Variation ID: 421982). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt RAD51C protein function. 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. This sequence change replaces arginine, which is basic and polar, with leucine, which is neutral and non-polar, at codon 24 of the RAD51C protein (p.Arg24Leu). This variant is present in population databases (no rsID available, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with RAD51C-related conditions. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.25
BayesDel_addAF	Uncertain	0.051	T
BayesDel_noAF	Benign	-0.16
CADD	Uncertain	24
DANN	Benign	0.95
DEOGEN2	Benign	0.079	T;D;.
Eigen	Uncertain	0.21
Eigen_PC	Benign	0.20
FATHMM_MKL	Uncertain	0.84	D
LIST_S2	Uncertain	0.91	D;D;D
M_CAP	Benign	0.049	D
MetaRNN	Pathogenic	0.81	D;D;D
MetaSVM	Benign	-0.78	T
MutationAssessor	Uncertain	2.6	.;M;M
PhyloP100		4.6
PrimateAI	Uncertain	0.69	T
PROVEAN	Pathogenic	-4.5	.;D;D
REVEL	Benign	0.24
Sift	Uncertain	0.0020	.;D;D
Sift4G	Benign	0.087	T;T;D
Polyphen		0.89	.;P;.
Vest4		0.82
MutPred		0.58		Loss of methylation at R24 (P = 0.0211);Loss of methylation at R24 (P = 0.0211);Loss of methylation at R24 (P = 0.0211);
MVP		0.75
MPC		0.56
ClinPred		0.98	D
GERP RS		2.6
PromoterAI		-0.080	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.33
gMVP		0.44
Mutation Taster		=69/31	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs777554369; hg19: chr17-56770075; COSMIC: COSV99542709; COSMIC: COSV99542709;