17-35103319-C-T

Variant names:

• chr17-35103319-C-T
• rs28363282
• NM_002878.4:c.673G>A

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_002878.4(RAD51D):​c.673G>A​(p.Ala225Thr) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts 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. A225S) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: RAD51D NM_002878.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 3.96
• Publications: 3 publications found

Genes affected

RAD51D (HGNC:9823): (RAD51 paralog D) 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, which are known to be involved in the homologous recombination and repair of DNA. This protein forms a complex with several other members of the RAD51 family, including RAD51L1, RAD51L2, and XRCC2. The protein complex formed with this protein has been shown to catalyze homologous pairing between single- and double-stranded DNA, and is thought to play a role in the early stage of recombinational repair of DNA. Alternative splicing results in multiple transcript variants. Read-through transcription also exists between this gene and the downstream ring finger and FYVE-like domain containing 1 (RFFL) gene. [provided by RefSeq, Jan 2011]

RAD51D Gene-Disease associations (from GenCC):

• breast-ovarian cancer, familial, susceptibility to, 4

  Inheritance: AD Classification: STRONG, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
• hereditary breast ovarian cancer syndrome

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

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen

ENSG00000267618 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.35388917).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RAD51D	NM_002878.4	c.673G>A	p.Ala225Thr	missense_variant	Exon 8 of 10	ENST00000345365.11	NP_002869.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RAD51D	ENST00000345365.11	c.673G>A	p.Ala225Thr	missense_variant	Exon 8 of 10	1	NM_002878.4	ENSP00000338790.6
ENSG00000267618	ENST00000593039.5	c.196G>A	p.Ala66Thr	missense_variant	Exon 4 of 7	2		ENSP00000466834.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:1

Nov 10, 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; Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 21111057, 14704354) -

Hereditary cancer-predisposing syndrome Uncertain:1

Nov 26, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.A225T variant (also known as c.673G>A), located in coding exon 8 of the RAD51D gene, results from a G to A substitution at nucleotide position 673. The alanine at codon 225 is replaced by threonine, an amino acid with similar properties. This amino acid position is highly 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. -

Breast-ovarian cancer, familial, susceptibility to, 4 Uncertain:1

Jan 13, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 225 of the RAD51D protein (p.Ala225Thr). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with RAD51D-related conditions. ClinVar contains an entry for this variant (Variation ID: 229842). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt RAD51D protein function with a negative predictive value of 80%. 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	0.32
BayesDel_addAF	Benign	-0.028	T
BayesDel_noAF	Benign	-0.28
CADD	Uncertain	25
DANN	Benign	0.93
DEOGEN2	Benign	0.29	.;.;.;T;T;.;.;.;.;T
Eigen	Uncertain	0.58
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Uncertain	0.95	D;D;D;.;D;D;D;D;D;D
M_CAP	Benign	0.048	D
MetaRNN	Benign	0.35	T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.71	T
MutationAssessor	Benign	2.0	.;.;.;M;M;.;.;.;.;.
PhyloP100		4.0
PROVEAN	Uncertain	-2.5	.;.;.;N;.;.;.;.;.;.
REVEL	Benign	0.14
Sift	Uncertain	0.0070	.;.;.;D;.;.;.;.;.;.
Sift4G	Benign	0.086	T;D;D;T;T;T;T;D;T;.
Polyphen		0.95, 1.0	.;.;.;P;P;D;.;.;.;.
Vest4		0.56
MutPred		0.16		.;.;.;Gain of MoRF binding (P = 0.1067);Gain of MoRF binding (P = 0.1067);.;.;.;.;.;
MVP		0.72
MPC		0.36
ClinPred		0.91	D
GERP RS		4.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.60
gMVP		0.35

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

Other links and lift over

dbSNP: rs28363282; hg19: chr17-33430338;