8-133237743-C-T

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The NM_006096.4(NDRG1):c.*1135G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0128 in 230,472 control chromosomes in the GnomAD database, including 83 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.017 (76 hom., cov: 29)
  • Exomes 𝑓: 0.0039 (7 hom.)
• Consequence: NDRG1 NM_006096.4 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.0730

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]

(HGNC:):

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.8).
• BP6: Variant 8-133237743-C-T is Benign according to our data. Variant chr8-133237743-C-T is described in ClinVar as [Benign]. Clinvar id is 362014.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0583 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NDRG1	NM_006096.4	c.*1135G>A		3_prime_UTR_variant	16/16	ENST00000323851.13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NDRG1	ENST00000323851.13	c.*1135G>A		3_prime_UTR_variant	16/16	1	NM_006096.4	P1
	ENST00000688585.1	n.185G>A		non_coding_transcript_exon_variant	1/1

Frequencies

GnomAD3 genomes AF: 0.0174 AC: 2622 AN: 150910 Hom.: 76 Cov.: 29

Gnomad AFR AF: 0.0603

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00685

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000420

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00641

Gnomad NFE AF: 0.000369

Gnomad OTH AF: 0.0131

GnomAD4 exome AF: 0.00391 AC: 311 AN: 79444 Hom.: 7 Cov.: 0 AF XY: 0.00381 AC XY: 139 AN XY: 36508

Gnomad4 AFR exome AF: 0.0583

Gnomad4 AMR exome AF: 0.00570

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000571

Gnomad4 OTH exome AF: 0.00660

GnomAD4 genome AF: 0.0174 AC: 2628 AN: 151028 Hom.: 76 Cov.: 29 AF XY: 0.0167 AC XY: 1233 AN XY: 73716

Gnomad4 AFR AF: 0.0603

Gnomad4 AMR AF: 0.00685

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000421

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000369

Gnomad4 OTH AF: 0.0129

Alfa AF: 0.0153 Hom.: 16

Bravo AF: 0.0203

Asia WGS AF: 0.00462 AC: 16 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Charcot-Marie-Tooth disease type 4D Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

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 and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.80
Cadd	Benign	7.1
Dann	Benign	0.61

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

LitVar

Other links and lift over

dbSNP: rs10675; hg19: chr8-134249986;