Genetic Variant MGMT:p.Arg128Gln (chr10-129759310-G-A) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 2P and 8B. PM1BP4_StrongBS2

The NM_002412.5(MGMT):c.383G>A(p.Arg128Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000481 in 1,614,164 control chromosomes in the GnomAD database, including 17 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.00035 ( 2 hom., cov: 33)

Exomes 𝑓: 0.00050 ( 15 hom. )

Consequence

MGMT
NM_002412.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 8.87

Publications

11 publications found

Variant links:

Genes affected

MGMT (HGNC:7059): (O-6-methylguanine-DNA methyltransferase) Alkylating agents are potent carcinogens that can result in cell death, mutation and cancer. The protein encoded by this gene is a DNA repair protein that is involved in cellular defense against mutagenesis and toxicity from alkylating agents. The protein catalyzes transfer of methyl groups from O(6)-alkylguanine and other methylated moieties of the DNA to its own molecule, which repairs the toxic lesions. Methylation of the genes promoter has been associated with several cancer types, including colorectal cancer, lung cancer, lymphoma and glioblastoma. [provided by RefSeq, Sep 2015]

MGMT links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -6 ACMG points.

PM1

In a mutagenesis_site Slightly reduced DNA repair activity. (size 0) in uniprot entity MGMT_HUMAN

BP4

Computational evidence support a benign effect (MetaRNN=0.021841228).

BS2

High Homozygotes in GnomAd4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MGMT	NM_002412.5 link	c.383G>A	p.Arg128Gln	missense_variant	Exon 4 of 5	ENST00000651593.1	NP_002403.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MGMT	ENST00000651593.1 link	c.383G>A	p.Arg128Gln	missense_variant	Exon 4 of 5		NM_002412.5	ENSP00000498729.1		P16455
MGMT	ENST00000306010.8 link	c.476G>A	p.Arg159Gln	missense_variant	Exon 4 of 5	1		ENSP00000302111.7		B4DEE8

Frequencies

GnomAD3 genomes

AF:

0.000355

AC:

AN:

152192

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00580

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.000279

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.000847

AC:

213

AN:

251444

AF XY:

0.00106

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.000173

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000163

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000185

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.000495

AC:

724

AN:

1461854

Hom.:

Cov.:

AF XY:

0.000620

AC XY:

451

AN XY:

727228

show subpopulations

African (AFR)

AF:

0.0000597

AC:

AN:

33480

American (AMR)

AF:

0.000179

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.000176

AC:

AN:

39700

South Asian (SAS)

AF:

0.00577

AC:

498

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53388

Middle Eastern (MID)

AF:

0.00191

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000151

AC:

168

AN:

1112006

Other (OTH)

AF:

0.000497

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

Heterozygous variant carriers

119

159

199

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<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

AF:

0.000348

AC:

AN:

152310

Hom.:

Cov.:

AF XY:

0.000457

AC XY:

AN XY:

74468

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41564

American (AMR)

AF:

0.000131

AC:

AN:

15310

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5174

South Asian (SAS)

AF:

0.00581

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00680

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000279

AC:

AN:

68030

Other (OTH)

AF:

0.000473

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.484

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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

Alfa

AF:

0.000262

Hom.:

Bravo

AF:

0.000174

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.000840

AC:

102

Asia WGS

AF:

0.00549

AC:

AN:

3478

EpiCase

AF:

0.000164

EpiControl

AF:

0.000237

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.41

BayesDel_addAF

Benign

-0.10

BayesDel_noAF

Uncertain

0.080

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

Eigen

Pathogenic

0.73

Eigen_PC

Pathogenic

0.71

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.99

M_CAP

Benign

0.046

MetaRNN

Benign

0.022

MetaSVM

Benign

-0.91

PhyloP100

8.9

PrimateAI

Benign

0.42

PROVEAN

Uncertain

-3.4

REVEL

Uncertain

0.45

Sift

Benign

0.041

Sift4G

Uncertain

0.029

Vest4

0.74

MVP

0.59

MPC

0.35

ClinPred

0.15

GERP RS

5.5

gMVP

0.86

Mutation Taster

=84/16

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over