Genetic Variant RAD1:p.Arg109Leu (chr5-34911794-C-A) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2PP3

The NM_002853.4(RAD1):c.326G>T(p.Arg109Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,824 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R109Q) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

RAD1
NM_002853.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.98

Publications

0 publications found

Variant links:

Genes affected

RAD1 (HGNC:9806): (RAD1 checkpoint DNA exonuclease) This gene encodes a component of a heterotrimeric cell cycle checkpoint complex, known as the 9-1-1 complex, that is activated to stop cell cycle progression in response to DNA damage or incomplete DNA replication. The 9-1-1 complex is recruited by RAD17 to affected sites where it may attract specialized DNA polymerases and other DNA repair effectors. Alternatively spliced transcript variants of this gene have been described. [provided by RefSeq, Jan 2009]

RAD1 links:

TTC23L (HGNC:26355): (tetratricopeptide repeat domain 23 like) Predicted to be located in cytoplasm; microtubule cytoskeleton; and midbody. [provided by Alliance of Genome Resources, Apr 2022]

TTC23L links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002853.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
RAD1	NM_002853.4	MANE Select	c.326G>T	p.Arg109Leu	missense	Exon 4 of 6	NP_002844.1	O60671-1
RAD1	NR_026591.2		n.375G>T		non_coding_transcript_exon	Exon 3 of 5
TTC23L	NR_169875.1		n.974-6570C>A		intron	N/A

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
RAD1	ENST00000382038.7	TSL:1 MANE Select	c.326G>T	p.Arg109Leu	missense	Exon 4 of 6	ENSP00000371469.2	O60671-1
RAD1	ENST00000325577.8	TSL:1	n.*10G>T		non_coding_transcript_exon	Exon 3 of 5	ENSP00000313467.4	O60671-3
RAD1	ENST00000325577.8	TSL:1	n.*10G>T		3_prime_UTR	Exon 3 of 5	ENSP00000313467.4	O60671-3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461824

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727206

show subpopulations

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

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26130

East Asian (EAS)

AF:

0.00

AC:

AN:

39690

South Asian (SAS)

AF:

0.00

AC:

AN:

86234

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111992

Other (OTH)

AF:

0.00

AC:

AN:

60390

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.00233887), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.350

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.58

BayesDel_addAF

Uncertain

0.017

BayesDel_noAF

Benign

-0.21

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.15

Eigen

Uncertain

0.45

Eigen_PC

Uncertain

0.51

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.96

M_CAP

Benign

0.018

MetaRNN

Pathogenic

0.76

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.8

PhyloP100

2.0

PrimateAI

Uncertain

0.54

PROVEAN

Uncertain

-3.3

REVEL

Benign

0.19

Sift

Uncertain

0.029

Sift4G

Benign

0.10

Polyphen

0.72

Vest4

0.76

MutPred

0.63

Loss of catalytic residue at R109 (P = 0.0137)

MVP

0.38

MPC

0.30

ClinPred

0.99

GERP RS

5.8

Varity_R

0.52

gMVP

0.79

Mutation Taster

=44/56

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.60

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.60

Position offset: -15

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over