rs1554099803

Positions:

• chr5-132616114-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_005732.4(RAD50):​c.3148G>A​(p.Val1050Ile) variant causes a missense change involving the alteration of a conserved nucleotide. 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. V1050F) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: RAD50 NM_005732.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.96

Genes affected

RAD50 (HGNC:9816): (RAD50 double strand break repair protein) The protein encoded by this gene is highly similar to Saccharomyces cerevisiae Rad50, a protein involved in DNA double-strand break repair. This protein forms a complex with MRE11 and NBS1. The protein complex binds to DNA and displays numerous enzymatic activities that are required for nonhomologous joining of DNA ends. This protein, cooperating with its partners, is important for DNA double-strand break repair, cell cycle checkpoint activation, telomere maintenance, and meiotic recombination. Knockout studies of the mouse homolog suggest this gene is essential for cell growth and viability. Mutations in this gene are the cause of Nijmegen breakage syndrome-like disorder.[provided by RefSeq, Apr 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3029943).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RAD50	NM_005732.4	c.3148G>A	p.Val1050Ile	missense_variant	20/25	ENST00000378823.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RAD50	ENST00000378823.8	c.3148G>A	p.Val1050Ile	missense_variant	20/25	1	NM_005732.4	P1
RAD50	ENST00000533482.5	c.*2774G>A		3_prime_UTR_variant, NMD_transcript_variant	20/25	1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 15, 2017

This variant has not been reported in the literature in individuals with RAD50-related disease. This variant is not present in population databases (ExAC no frequency). This sequence change replaces valine with isoleucine at codon 1050 of the RAD50 protein (p.Val1050Ile). The valine residue is moderately conserved and there is a small physicochemical difference between valine and isoleucine. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. 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	0.12
BayesDel_addAF	Benign	-0.0086	T
BayesDel_noAF	Benign	-0.25
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.084	.;.;.;T
Eigen	Benign	0.097
Eigen_PC	Uncertain	0.27
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.91	.;.;D;D
M_CAP	Benign	0.0050	T
MetaRNN	Benign	0.30	T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.0	.;.;.;M
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.49	T
REVEL	Benign	0.10
Sift4G	Benign	0.32	.;.;.;T
Polyphen		0.25	.;.;.;B
Vest4		0.41
MutPred		0.28		.;.;.;Loss of helix (P = 0.079);
MVP		0.76
ClinPred		0.97	D
GERP RS		5.0
RBP_binding_hub_radar		0.97
RBP_regulation_power_radar		2.7
Varity_R		0.15
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

Publications

LitVar

Other links and lift over

dbSNP: rs1554099803; hg19: chr5-131951806; COSMIC: COSV54754441; COSMIC: COSV54754441;