5-132559366-A-G

Variant names:

• chr5-132559366-A-G
• rs1060501940
• NM_005732.4:c.212A>G

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_005732.4(RAD50):​c.212A>G​(p.Lys71Arg) variant causes a missense, splice region change. The variant was absent in control chromosomes in GnomAD project. 2/3 splice prediction tools predicting alterations to normal splicing. 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. K71T) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: RAD50 NM_005732.4 missense, splice_region
• Scores: Splicing: ADA: 0.9998
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.99
• Publications: 0 publications found

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]

RAD50 Gene-Disease associations (from GenCC):

• Nijmegen breakage syndrome-like disorder

  Inheritance: AR Classification: STRONG, LIMITED Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
• familial ovarian cancer

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
• hereditary breast carcinoma

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ENSG00000283782 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. Scorers claiming Uncertain: max_spliceai. No scorers claiming Benign.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005732.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RAD50	NM_005732.4	MANE Select	c.212A>G	p.Lys71Arg	missense splice_region	Exon 2 of 25	NP_005723.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RAD50	ENST00000378823.8	TSL:1 MANE Select	c.212A>G	p.Lys71Arg	missense splice_region	Exon 2 of 25	ENSP00000368100.4
	ENSG00000283782	ENST00000638452.2	TSL:5	c.-86A>G		splice_region	Exon 4 of 27	ENSP00000492349.2
	RAD50	ENST00000416135.5	TSL:1	c.-86A>G		splice_region	Exon 2 of 5	ENSP00000389515.1

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

Jul 18, 2016

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In summary, this variant is a novel missense change with uncertain impact on protein function and mRNA splicing. It has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of sequence changes on mRNA splicing suggest that this variant may alter mRNA splicing, but this prediction has not been confirmed by published transcriptional studies. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a RAD50-related disease. This sequence change replaces lysine with arginine at codon 71 of the RAD50 protein (p.Lys71Arg). The lysine residue is highly conserved and there is a small physicochemical difference between lysine and arginine.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.49
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Benign	0.17	T
Eigen	Uncertain	0.63
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.97	D
M_CAP	Benign	0.018	T
MetaRNN	Uncertain	0.45	T
MetaSVM	Benign	-1.2	T
MutationAssessor	Uncertain	2.2	M
PhyloP100		7.0
PrimateAI	Uncertain	0.72	T
PROVEAN	Uncertain	-2.6	D
REVEL	Benign	0.24
Sift	Benign	0.070	T
Sift4G	Benign	0.13	T
Polyphen		1.0	D
Vest4		0.68
MutPred		0.39		Loss of ubiquitination at K71 (P = 0.0081)
MVP		0.54
ClinPred		0.99	D
GERP RS		5.0
Varity_R		0.49
gMVP		0.39
Mutation Taster		=63/37	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	1.0
SpliceAI score (max)		0.29		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.29		Position offset: 1

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs1060501940; hg19: chr5-131895058;