chr5-132640802-T-C

Variant names:

• chr5-132640802-T-C
• rs1060501965
• NM_005732.4:c.3749T>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_005732.4(RAD50):​c.3749T>C​(p.Val1250Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,076 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/19 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. V1250I) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: RAD50 NM_005732.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.0550
• 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]

ENSG00000283782 (HGNC:):

TH2LCRR (HGNC:40495): (T helper type 2 locus control region associated RNA)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.21492931).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RAD50	NM_005732.4	c.3749T>C	p.Val1250Ala	missense_variant	Exon 24 of 25	ENST00000378823.8	NP_005723.2
TH2LCRR	NR_132124.1	n.45+944A>G		intron_variant	Intron 1 of 2
TH2LCRR	NR_132125.1	n.189+1396A>G		intron_variant	Intron 2 of 2
TH2LCRR	NR_132126.1	n.175-2537A>G		intron_variant	Intron 1 of 1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RAD50	ENST00000378823.8	c.3749T>C	p.Val1250Ala	missense_variant	Exon 24 of 25	1	NM_005732.4	ENSP00000368100.4
ENSG00000283782	ENST00000638452.2	c.3452T>C	p.Val1151Ala	missense_variant	Exon 26 of 27	5		ENSP00000492349.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461076 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 726848

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33410

American (AMR) AF: 0.00 AC: 0 AN: 44686

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39654

South Asian (SAS) AF: 0.00 AC: 0 AN: 86208

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111464

Other (OTH) AF: 0.00 AC: 0 AN: 60340

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

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 15, 2019

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces valine with alanine at codon 1250 of the RAD50 protein (p.Val1250Ala). The valine residue is moderately conserved and there is a small physicochemical difference between valine and alanine. 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. 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: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). In summary, this variant is a novel missense change with uncertain impact on protein function. 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	Benign	-0.16	T
BayesDel_noAF	Benign	-0.47
CADD	Benign	17
DANN	Uncertain	0.99
DEOGEN2	Benign	0.080	.;.;.;T
Eigen	Benign	-0.57
Eigen_PC	Benign	-0.58
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.87	.;.;D;D
M_CAP	Benign	0.035	D
MetaRNN	Benign	0.21	T;T;T;T
MetaSVM	Benign	-0.78	T
MutationAssessor	Benign	0.32	.;.;.;N
PhyloP100		0.055
PrimateAI	Pathogenic	0.85	D
REVEL	Benign	0.14
Sift4G	Uncertain	0.059	.;.;.;T
Polyphen		0.44	.;.;.;B
Vest4		0.15
MutPred		0.57		.;.;.;Gain of disorder (P = 0.0363);
MVP		0.40
ClinPred		0.40	T
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.17
gMVP		0.65
Mutation Taster		=86/14	polymorphism

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: rs1060501965; hg19: chr5-131976494;