17-35107043-G-A

Position:

• chr17-35107043-G-A

Variant summary

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

The NM_002878.4(RAD51D):​c.425C>T​(p.Thr142Ile) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: RAD51D NM_002878.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 4.49

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]

RAD51L3-RFFL (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RAD51D	NM_002878.4	c.425C>T	p.Thr142Ile	missense_variant	5/10	ENST00000345365.11	NP_002869.3
RAD51L3-RFFL	NR_037714.1	n.233-562C>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RAD51D	ENST00000345365.11	c.425C>T	p.Thr142Ile	missense_variant	5/10	1	NM_002878.4	ENSP00000338790	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 20, 2024

The p.T142I variant (also known as c.425C>T), located in coding exon 5 of the RAD51D gene, results from a C to T substitution at nucleotide position 425. The threonine at codon 142 is replaced by isoleucine, an amino acid with similar properties. This amino acid position is well conserved in available vertebrate species. 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. -

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

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 27, 2021

This sequence change replaces threonine with isoleucine at codon 142 of the RAD51D protein (p.Thr142Ile). The threonine residue is moderately conserved and there is a moderate physicochemical difference between threonine and isoleucine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals affected with RAD51D-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). 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	Uncertain	0.35
BayesDel_addAF	Pathogenic	0.28	D
BayesDel_noAF	Pathogenic	0.17
CADD	Pathogenic	26
DANN	Benign	0.90
DEOGEN2	Benign	0.28	.;T;T;.;.;T
Eigen	Uncertain	0.54
Eigen_PC	Uncertain	0.52
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Benign	0.82	T;.;T;T;T;T
M_CAP	Uncertain	0.090	D
MetaRNN	Uncertain	0.69	D;D;D;D;D;D
MetaSVM	Benign	-0.73	T
MutationAssessor	Benign	1.7	.;L;L;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D;D
PROVEAN	Uncertain	-3.3	.;D;.;.;.;.
REVEL	Benign	0.22
Sift	Uncertain	0.0040	.;D;.;.;.;.
Sift4G	Uncertain	0.019	D;T;T;T;D;.
Polyphen		0.99	.;D;D;.;.;.
Vest4		0.67, 0.66, 0.71
MutPred		0.47		.;Gain of stability (P = 0.0068);Gain of stability (P = 0.0068);.;.;.;
MVP		0.91
MPC		0.30
ClinPred		0.98	D
GERP RS		4.7
Varity_R		0.35
gMVP		0.57

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: rs757099471; hg19: chr17-33434062;