rs863224806

Positions:

• chr17-58709871-A-G
• chr17-58709871-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_058216.3(RAD51C):​c.718A>G​(p.Ile240Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 30)
• Consequence: RAD51C NM_058216.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.89

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 Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.19484392).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RAD51C	NM_058216.3	c.718A>G	p.Ile240Val	missense_variant	5/9	ENST00000337432.9	NP_478123.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RAD51C	ENST00000337432.9	c.718A>G	p.Ile240Val	missense_variant	5/9	1	NM_058216.3	ENSP00000336701	P2

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 30

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Fanconi anemia complementation group O Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 27, 2021

This sequence change replaces isoleucine with valine at codon 240 of the RAD51C protein (p.Ile240Val). The isoleucine residue is weakly conserved and there is a small physicochemical difference between isoleucine and valine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals affected with RAD51C-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The valine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.065
BayesDel_addAF	Benign	-0.057	T
BayesDel_noAF	Benign	-0.32
CADD	Benign	14
DANN	Benign	0.56
DEOGEN2	Benign	0.0081	T;T;T;T;.
Eigen	Benign	-0.55
Eigen_PC	Benign	-0.32
FATHMM_MKL	Benign	0.44	N
LIST_S2	Benign	0.78	T;T;T;T;T
M_CAP	Benign	0.0036	T
MetaRNN	Benign	0.19	T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	-0.48	.;.;N;.;.
MutationTaster	Benign	0.72	D;D
PrimateAI	Benign	0.47	T
PROVEAN	Benign	0.13	.;.;N;N;.
REVEL	Benign	0.074
Sift	Benign	0.84	.;.;T;D;.
Sift4G	Benign	0.64	T;T;T;.;T
Polyphen		0.0060	.;.;B;.;.
Vest4		0.20, 0.21
MutPred		0.73		.;Gain of sheet (P = 0.0827);Gain of sheet (P = 0.0827);.;.;
MVP		0.63
MPC		0.20
ClinPred		0.58	D
GERP RS		2.6
Varity_R		0.035
gMVP		0.24

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: rs863224806; hg19: chr17-56787232;