15-40698766-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_002875.5(RAD51):c.8T>C(p.Met3Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,752 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign 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. M3I) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: RAD51 NM_002875.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.21

Genes affected

RAD51 (HGNC:9817): (RAD51 recombinase) The protein encoded by this gene is a member of the RAD51 protein 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 the ssDNA-binding protein RPA and RAD52, and it is thought to play roles in homologous pairing and strand transfer of DNA. This protein is also found to interact with BRCA1 and BRCA2, which may be important for the cellular response to DNA damage. BRCA2 is shown to regulate both the intracellular localization and DNA-binding ability of this protein. Loss of these controls following BRCA2 inactivation may be a key event leading to genomic instability and tumorigenesis. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, RAD51
• BP4: Computational evidence support a benign effect (MetaRNN=0.16654137).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RAD51	NM_002875.5	c.8T>C	p.Met3Thr	missense_variant	2/10	ENST00000267868.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RAD51	ENST00000267868.8	c.8T>C	p.Met3Thr	missense_variant	2/10	1	NM_002875.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461752 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727194

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 25, 2023

The p.M3T variant (also known as c.8T>C), located in coding exon 1 of the RAD51 gene, results from a T to C substitution at nucleotide position 8. The methionine at codon 3 is replaced by threonine, an amino acid with similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Pathogenic	0.28	D
BayesDel_noAF	Pathogenic	0.16
Cadd	Benign	23
Dann	Benign	0.94
DEOGEN2	Benign	0.017	T;.;T;.;.;.;.;.
Eigen	Benign	-0.23
Eigen_PC	Benign	0.012
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.85	T;T;T;T;.;T;T;.
M_CAP	Benign	0.020	T
MetaRNN	Benign	0.17	T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Uncertain	0.69	T
PROVEAN	Benign	-0.72	N;N;N;N;N;N;N;.
REVEL	Benign	0.19
Sift	Benign	0.17	T;D;T;D;T;T;T;.
Sift4G	Benign	0.59	T;T;T;T;T;T;T;.
Polyphen		0.19, 0.0010	.;B;B;.;.;.;.;.
Vest4		0.51, 0.51, 0.65, 0.52
MutPred		0.23		Gain of glycosylation at M3 (P = 0.0046);Gain of glycosylation at M3 (P = 0.0046);Gain of glycosylation at M3 (P = 0.0046);Gain of glycosylation at M3 (P = 0.0046);Gain of glycosylation at M3 (P = 0.0046);Gain of glycosylation at M3 (P = 0.0046);Gain of glycosylation at M3 (P = 0.0046);Gain of glycosylation at M3 (P = 0.0046);
MVP		0.94
MPC		1.1
ClinPred		0.51	D
GERP RS		5.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.14
gMVP		0.56

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: rs374776986; hg19: chr15-40990964;