rs878854788

Positions:

• chr5-132594922-A-C
• chr5-132594922-A-G

Variant summary

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

The NM_005732.4(RAD50):​c.1847A>C​(p.Lys616Thr) 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. 13/21 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. K616E) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: RAD50 NM_005732.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.20

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=0.26516742).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RAD50	NM_005732.4	c.1847A>C	p.Lys616Thr	missense_variant	12/25	ENST00000378823.8	NP_005723.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RAD50	ENST00000378823.8	c.1847A>C	p.Lys616Thr	missense_variant	12/25	1	NM_005732.4	ENSP00000368100	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

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

Jul 06, 2022

This variant is not present in population databases (gnomAD no frequency). This sequence change replaces lysine, which is basic and polar, with threonine, which is neutral and polar, at codon 616 of the RAD50 protein (p.Lys616Thr). This variant has not been reported in the literature in individuals affected with RAD50-related conditions. 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. 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. ClinVar contains an entry for this variant (Variation ID: 1018951). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.23
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.42
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.27	.;.;.;T;T
Eigen	Benign	-0.13
Eigen_PC	Benign	-0.028
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.94	.;.;D;D;D
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.27	T;T;T;T;T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	1.5	.;.;.;L;.
MutationTaster	Benign	0.78	D;D
PrimateAI	Uncertain	0.55	T
PROVEAN	Benign	-2.3	.;.;.;.;N
REVEL	Benign	0.11
Sift	Uncertain	0.021	.;.;.;.;D
Sift4G	Benign	0.067	.;.;.;T;D
Polyphen		0.56	.;.;.;P;.
Vest4		0.37
MutPred		0.36		.;.;.;Loss of ubiquitination at K616 (P = 0.0027);.;
MVP		0.44
ClinPred		0.87	D
GERP RS		2.2
Varity_R		0.35
gMVP		0.36

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: rs878854788; hg19: chr5-131930614;