3-8941678-C-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_020165.4(RAD18):c.393G>T(p.Arg131Ser) 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. 15/21 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. R131T) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: RAD18 NM_020165.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.580

Genes affected

RAD18 (HGNC:18278): (RAD18 E3 ubiquitin protein ligase) The protein encoded by this gene is highly similar to S. cerevisiae DNA damage repair protein Rad18. Yeast Rad18 functions through its interaction with Rad6, which is an ubiquitin-conjugating enzyme required for post-replication repair of damaged DNA. Similar to its yeast counterpart, this protein is able to interact with the human homolog of yeast Rad6 protein through a conserved ring-finger motif. Mutation of this motif results in defective replication of UV-damaged DNA and hypersensitivity to multiple mutagens. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.05100715).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RAD18	NM_020165.4	c.393G>T	p.Arg131Ser	missense_variant	5/13	ENST00000264926.7
RAD18	XM_017006873.2	c.135G>T	p.Arg45Ser	missense_variant	3/11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RAD18	ENST00000264926.7	c.393G>T	p.Arg131Ser	missense_variant	5/13	1	NM_020165.4	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 13, 2022

The c.393G>T (p.R131S) alteration is located in exon 5 (coding exon 5) of the RAD18 gene. This alteration results from a G to T substitution at nucleotide position 393, causing the arginine (R) at amino acid position 131 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Benign	-0.26	T
BayesDel_noAF	Benign	-0.61
Cadd	Benign	6.6
Dann	Benign	0.90
DEOGEN2	Benign	0.032	T
Eigen	Benign	-0.99
Eigen_PC	Benign	-0.99
FATHMM_MKL	Benign	0.048	N
LIST_S2	Benign	0.71	T
M_CAP	Benign	0.0036	T
MetaRNN	Benign	0.051	T
MetaSVM	Benign	-0.95	T
MutationAssessor	Benign	1.9	M
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.22	T
PROVEAN	Benign	-0.77	N
REVEL	Benign	0.067
Sift	Benign	0.42	T
Sift4G	Benign	0.79	T
Polyphen		0.021	B
Vest4		0.23
MutPred		0.39		Loss of MoRF binding (P = 0.0085);
MVP		0.12
MPC		0.053
ClinPred		0.027	T
GERP RS		-1.9
Varity_R		0.099
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

No publications associated with this variant yet.

Other links and lift over

hg19: chr3-8983362;