NM_018283.4:c.187G>A

Variant names:

• chr13-48040948-G-A
• NM_018283.4:c.187G>A

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM1 PM2 PP3_Strong

The NM_018283.4(NUDT15):​c.187G>A​(p.Glu63Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: NUDT15 NM_018283.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.05

Genes affected

NUDT15 (HGNC:23063): (nudix hydrolase 15) This gene encodes an enzyme that belongs to the Nudix hydrolase superfamily. Members of this superfamily catalyze the hydrolysis of nucleoside diphosphates, including substrates like 8-oxo-dGTP, which are a result of oxidative damage, and can induce base mispairing during DNA replication, causing transversions. The encoded enzyme is a negative regulator of thiopurine activation and toxicity. Mutations in this gene result in poor metabolism of thiopurines, and are associated with thiopurine-induced early leukopenia. Multiple pseudogenes of this gene have been identified. [provided by RefSeq, Apr 2016]

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PM1: In a binding_site (size 0) in uniprot entity NUD15_HUMAN
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.944

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NUDT15	NM_018283.4	c.187G>A	p.Glu63Lys	missense_variant	Exon 2 of 3	ENST00000258662.3	NP_060753.1
NUDT15	NM_001304745.2	c.187G>A	p.Glu63Lys	missense_variant	Exon 2 of 2		NP_001291674.1
NUDT15	NR_136687.2	n.208G>A		non_coding_transcript_exon_variant	Exon 2 of 5
NUDT15	NR_136688.2	n.208G>A		non_coding_transcript_exon_variant	Exon 2 of 5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NUDT15	ENST00000258662.3	c.187G>A	p.Glu63Lys	missense_variant	Exon 2 of 3	1	NM_018283.4	ENSP00000258662.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Feb 07, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.187G>A (p.E63K) alteration is located in exon 2 (coding exon 2) of the NUDT15 gene. This alteration results from a G to A substitution at nucleotide position 187, causing the glutamic acid (E) at amino acid position 63 to be replaced by a lysine (K). 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	Pathogenic	0.85
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.34
CADD	Pathogenic	28
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.16	T
Eigen	Pathogenic	0.96
Eigen_PC	Pathogenic	0.90
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.93	D
M_CAP	Benign	0.076	D
MetaRNN	Pathogenic	0.94	D
MetaSVM	Uncertain	0.37	D
MutationAssessor	Pathogenic	3.9	H
PrimateAI	Uncertain	0.70	T
PROVEAN	Uncertain	-3.9	D
REVEL	Pathogenic	0.80
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.043	D
Polyphen		0.99	D
Vest4		0.93
MutPred		0.80		Gain of ubiquitination at E63 (P = 0.0219);
MVP		0.87
MPC		0.42
ClinPred		1.0	D
GERP RS		5.8
Varity_R		0.94
gMVP		0.97

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: chr13-48615084;