8-133284281-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_006096.4(NDRG1):c.31G>A(p.Ala11Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00186 in 1,614,144 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0014 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0019 ( 4 hom. )

Consequence

NDRG1
NM_006096.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:6B:7

Conservation

PhyloP100: 3.33

Publications

8 publications found

Variant links:

Genes affected

NDRG1 (HGNC:7679): (N-myc downstream regulated 1) This gene is a member of the N-myc downregulated gene family which belongs to the alpha/beta hydrolase superfamily. The protein encoded by this gene is a cytoplasmic protein involved in stress responses, hormone responses, cell growth, and differentiation. The encoded protein is necessary for p53-mediated caspase activation and apoptosis. Mutations in this gene are a cause of Charcot-Marie-Tooth disease type 4D, and expression of this gene may be a prognostic indicator for several types of cancer. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, May 2012]

NDRG1 Gene-Disease associations (from GenCC):

Charcot-Marie-Tooth disease type 4D
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Illumina

NDRG1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.009936959).

BP6

Variant 8-133284281-C-T is Benign according to our data. Variant chr8-133284281-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 220934.

BS1

Variant frequency is greater than expected in population amr. GnomAd4 allele frequency = 0.00137 (209/152258) while in subpopulation AMR AF = 0.00418 (64/15306). AF 95% confidence interval is 0.00336. There are 0 homozygotes in GnomAd4. There are 97 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 4 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NDRG1	NM_006096.4 link	c.31G>A	p.Ala11Thr	missense_variant	Exon 2 of 16	ENST00000323851.13	NP_006087.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NDRG1	ENST00000323851.13 link	c.31G>A	p.Ala11Thr	missense_variant	Exon 2 of 16	1	NM_006096.4	ENSP00000319977.8

Frequencies

GnomAD3 genomes

AF:

0.00137

AC:

209

AN:

152140

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000386

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00419

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00185

Gnomad OTH

AF:

0.00143

GnomAD2 exomes

AF:

0.00117

AC:

294

AN:

251476

AF XY:

0.000979

show subpopulations

Gnomad AFR exome

AF:

0.000308

Gnomad AMR exome

AF:

0.00228

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000139

Gnomad NFE exome

AF:

0.00171

Gnomad OTH exome

AF:

0.00195

GnomAD4 exome

AF:

0.00191

AC:

2797

AN:

1461886

Hom.:

Cov.:

AF XY:

0.00180

AC XY:

1307

AN XY:

727246

show subpopulations

African (AFR)

AF:

0.000508

AC:

AN:

33480

American (AMR)

AF:

0.00239

AC:

107

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.0000562

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00233

AC:

2588

AN:

1112006

Other (OTH)

AF:

0.00134

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.470

Heterozygous variant carriers

148

295

443

590

738

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

104

208

312

416

520

<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:

0.00137

AC:

209

AN:

152258

Hom.:

Cov.:

AF XY:

0.00130

AC XY:

AN XY:

74438

show subpopulations

African (AFR)

AF:

0.000385

AC:

AN:

41534

American (AMR)

AF:

0.00418

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5168

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10610

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00185

AC:

126

AN:

68026

Other (OTH)

AF:

0.00142

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.507

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.00157

Hom.:

Bravo

AF:

0.00175

TwinsUK

AF:

0.00324

AC:

ALSPAC

AF:

0.00311

AC:

ESP6500AA

AF:

0.000681

AC:

ESP6500EA

AF:

0.00174

AC:

ExAC

AF:

0.00102

AC:

124

EpiCase

AF:

0.00174

EpiControl

AF:

0.00184

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:6Benign:7

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2Benign:4

Mar 23, 2021

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is associated with the following publications: (PMID: 32376792) -

Nov 25, 2022

Mayo Clinic Laboratories, Mayo Clinic

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

BP4 -

Clinical Genetics, Academic Medical Center

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Nov 01, 2020

CeGaT Center for Human Genetics Tuebingen

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Nov 22, 2019

Athena Diagnostics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Charcot-Marie-Tooth disease type 4D

Uncertain:2

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Jul 09, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The NDRG1 c.31G>A; p.Ala11Thr variant (rs145871479, ClinVar Variation ID 220934) is reported in the literature in a cohort of CMT patients (Volodarsky 2021). This variant is found in the general population with an overall allele frequency of 0.1% (313/282870 alleles, including 1 homozygote) in the Genome Aggregation Database (v2.1.1). Computational analyses are uncertain whether this variant is neutral or deleterious (REVEL: 0.153). Due to limited information, the clinical significance of this variant is uncertain at this time. References: Volodarsky M et al. Comprehensive genetic sequence and copy number analysis for Charcot-Marie-Tooth disease in a Canadian cohort of 2517 patients. J Med Genet. 2021 Apr;58(4):284-288. PMID: 32376792. -

Charcot-Marie-Tooth disease type 4

Benign:2

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Dec 27, 2019

Natera, Inc.

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Inborn genetic diseases

Uncertain:1

Dec 20, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.31G>A (p.A11T) alteration is located in exon 2 (coding exon 1) of the NDRG1 gene. This alteration results from a G to A substitution at nucleotide position 31, causing the alanine (A) at amino acid position 11 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

NDRG1-related disorder

Uncertain:1

Apr 21, 2023

PreventionGenetics, part of Exact Sciences

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The NDRG1 c.31G>A variant is predicted to result in the amino acid substitution p.Ala11Thr. This variant was reported in an individual with Charcot-Marie-Tooth disease (Table S2, Volodarsky et al 2021. PubMed ID: 32376792). This variant is reported in 0.23% of alleles in individuals of Latino descent in gnomAD (http://gnomad.broadinstitute.org/variant/8-134296524-C-T). Although we suspect that this variant may be benign, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Charcot-Marie-Tooth disease

Benign:1

Molecular Genetics Laboratory, London Health Sciences Centre

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.083

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.24

CADD

Benign

(source)

DANN

Benign

0.84

DEOGEN2

Benign

0.12

T;T;T;T;.;T;.;.;T;.;T

Eigen

Benign

-0.10

Eigen_PC

Benign

-0.0051

FATHMM_MKL

Benign

0.73

LIST_S2

Uncertain

0.88

.;D;T;T;D;D;.;D;D;D;D

M_CAP

Benign

0.0093

MetaRNN

Benign

0.0099

T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.53

N;N;.;.;.;.;.;.;.;.;.

PhyloP100

3.3

PrimateAI

Uncertain

0.56

PROVEAN

Benign

1.7

N;N;N;N;N;N;N;N;N;N;N

REVEL

Benign

0.15

Sift

Benign

1.0

T;T;D;T;T;T;T;T;T;T;T

Sift4G

Benign

1.0

T;T;D;T;.;T;T;T;.;.;T

Polyphen

0.027

B;B;D;.;.;.;.;.;.;.;.

Vest4

0.47

MVP

0.44

MPC

0.29

ClinPred

0.042

GERP RS

5.0

PromoterAI

0.0010

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.11

gMVP

0.39

Mutation Taster

=76/24

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over