chr8-24955877-G-C

Variant names:

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 1P and 13B. PP2BP4_StrongBP6BS1BS2

The NM_006158.5(NEFL):c.639C>G(p.Ile213Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000786 in 1,607,886 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I213V) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00080 ( 3 hom. )

Consequence

NEFL
NM_006158.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:9O:1

Conservation

PhyloP100: -0.238

Publications

4 publications found

Variant links:

Genes affected

NEFL (HGNC:7739): (neurofilament light chain) Neurofilaments are type IV intermediate filament heteropolymers composed of light, medium, and heavy chains. Neurofilaments comprise the axoskeleton and they functionally maintain the neuronal caliber. They may also play a role in intracellular transport to axons and dendrites. This gene encodes the light chain neurofilament protein. Mutations in this gene cause Charcot-Marie-Tooth disease types 1F (CMT1F) and 2E (CMT2E), disorders of the peripheral nervous system that are characterized by distinct neuropathies. A pseudogene has been identified on chromosome Y. [provided by RefSeq, Oct 2008]

NEFL Gene-Disease associations (from GenCC):

Charcot-Marie-Tooth disease
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
Charcot-Marie-Tooth disease type 2
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
Charcot-Marie-Tooth disease type 1F
Inheritance: AR, AD Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet
Charcot-Marie-Tooth disease type 2E
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Charcot-Marie-Tooth disease type 2B5
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

NEFL links:

ENSG00000272157 (HGNC:):

ENSG00000272157 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -12 ACMG points.

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 19 curated pathogenic missense variants (we use a threshold of 10). The gene has 5 curated benign missense variants. Trascript score misZ: 0.63774 (below the threshold of 3.09). GenCC associations: The gene is linked to Charcot-Marie-Tooth disease type 2B5, Charcot-Marie-Tooth disease type 2, Charcot-Marie-Tooth disease type 2E, Charcot-Marie-Tooth disease, Charcot-Marie-Tooth disease type 1F.

BP4

Computational evidence support a benign effect (MetaRNN=0.044317156).

BP6

Variant 8-24955877-G-C is Benign according to our data. Variant chr8-24955877-G-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 66695.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000663 (101/152312) while in subpopulation NFE AF = 0.00129 (88/68022). AF 95% confidence interval is 0.00107. There are 0 homozygotes in GnomAd4. There are 47 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 3 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NEFL	NM_006158.5 link	c.639C>G	p.Ile213Met	missense_variant	Exon 1 of 4	ENST00000610854.2	NP_006149.2	P07196

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
NEFL	ENST00000610854.2 link	c.639C>G	p.Ile213Met	missense_variant	Exon 1 of 4	1	NM_006158.5	ENSP00000482169.2	P07196
ENSG00000272157	ENST00000607735.3 link	n.187G>C		non_coding_transcript_exon_variant	Exon 1 of 1	6
NEFL	ENST00000615973.1 link	n.845C>G		non_coding_transcript_exon_variant	Exon 1 of 1	6

Frequencies

GnomAD3 genomes

AF:

0.000664

AC:

101

AN:

152194

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000620

Gnomad FIN

AF:

0.000565

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00129

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000719

AC:

175

AN:

243230

AF XY:

0.000716

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000116

Gnomad ASJ exome

AF:

0.0000999

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000517

Gnomad NFE exome

AF:

0.00125

Gnomad OTH exome

AF:

0.000667

GnomAD4 exome

AF:

0.000798

AC:

1162

AN:

1455574

Hom.:

Cov.:

AF XY:

0.000872

AC XY:

632

AN XY:

724484

show subpopulations

African (AFR)

AF:

0.0000597

AC:

AN:

33476

American (AMR)

AF:

0.000134

AC:

AN:

44718

Ashkenazi Jewish (ASJ)

AF:

0.0000383

AC:

AN:

26124

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.000487

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.000570

AC:

AN:

47378

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000936

AC:

1041

AN:

1111828

Other (OTH)

AF:

0.000713

AC:

AN:

60328

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

Heterozygous variant carriers

181

272

362

453

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

112

140

<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:

0.000663

AC:

101

AN:

152312

Hom.:

Cov.:

AF XY:

0.000631

AC XY:

AN XY:

74470

show subpopulations

African (AFR)

AF:

0.0000721

AC:

AN:

41586

American (AMR)

AF:

0.0000653

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5162

South Asian (SAS)

AF:

0.000621

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.000565

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00129

AC:

AN:

68022

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.482

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:

0.000944

Hom.:

Bravo

AF:

0.000563

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00104

AC:

ESP6500AA

AF:

0.000255

AC:

ESP6500EA

AF:

0.00181

AC:

ExAC

AF:

0.000852

AC:

103

Asia WGS

AF:

0.00115

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:9Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Benign:3Other:1

Sep 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

NEFL: BP4 -

May 15, 2019

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is associated with the following publications: (PMID: 16930284, 20039262, 17052987, 32376792) -

Epithelial Biology; Institute of Medical Biology, Singapore

Significance:not provided

Review Status:no classification provided

Collection Method:literature only

- -

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

not specified

Uncertain:1Benign:2

Clinical Genetics, Academic Medical Center

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Inherited Neuropathy Consortium

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Oct 15, 2018

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Inborn genetic diseases

Uncertain:1

Dec 19, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Unlikely to be causative of autosomal dominant NEFL-related Charcot-Marie-Tooth disease Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

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

- -

Charcot-Marie-Tooth disease type 1F

Benign:1

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to rule this variant out of causing disease. Therefore, this variant is classified as benign. -

Charcot-Marie-Tooth disease type 2E

Benign:1

Jan 25, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

NEFL-related disorder

Benign:1

Apr 09, 2021

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.19

BayesDel_addAF

Benign

-0.30

BayesDel_noAF

Benign

-0.24

CADD

Uncertain

(source)

DANN

Benign

0.93

DEOGEN2

Uncertain

0.74

FATHMM_MKL

Benign

0.35

LIST_S2

Uncertain

0.89

MetaRNN

Benign

0.044

PhyloP100

-0.24

PrimateAI

Uncertain

0.59

Sift4G

Uncertain

0.024

Polyphen

0.40

Vest4

0.15

MVP

0.62

GERP RS

2.5

Varity_R

0.20

gMVP

0.48

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

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over