1-204944337-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBS1_SupportingBS2

The NM_001005388.3(NFASC):c.22C>T(p.Pro8Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00033 in 1,613,840 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00031 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00033 ( 3 hom. )

Consequence

NFASC
NM_001005388.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2B:1

Conservation

PhyloP100: 2.30

Publications

2 publications found

Variant links:

Genes affected

NFASC (HGNC:29866): (neurofascin) This gene encodes an L1 family immunoglobulin cell adhesion molecule with multiple IGcam and fibronectin domains. The protein functions in neurite outgrowth, neurite fasciculation, and organization of the axon initial segment (AIS) and nodes of Ranvier on axons during early development. Both the AIS and nodes of Ranvier contain high densities of voltage-gated Na+ (Nav) channels which are clustered by interactions with cytoskeletal and scaffolding proteins including this protein, gliomedin, ankyrin 3 (ankyrin-G), and betaIV spectrin. This protein links the AIS extracellular matrix to the intracellular cytoskeleton. This gene undergoes extensive alternative splicing, and the full-length nature of some variants has not been determined.[provided by RefSeq, May 2009]

NFASC Gene-Disease associations (from GenCC):

neurodevelopmental disorder with central and peripheral motor dysfunction
Inheritance: AR, AD Classification: STRONG, MODERATE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics

NFASC links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.008660942).

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.000309 (47/152320) while in subpopulation SAS AF = 0.0058 (28/4824). AF 95% confidence interval is 0.00413. There are 0 homozygotes in GnomAd4. There are 33 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High Homozygotes in GnomAdExome4 at 3 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NFASC	NM_001005388.3 link	c.22C>T	p.Pro8Ser	missense_variant	Exon 3 of 30	ENST00000339876.11	NP_001005388.2	O94856-9
NFASC	NM_001160331.2 link	c.22C>T	p.Pro8Ser	missense_variant	Exon 2 of 28	ENST00000539706.6	NP_001153803.1	O94856-11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NFASC	ENST00000339876.11 link	c.22C>T	p.Pro8Ser	missense_variant	Exon 3 of 30	5	NM_001005388.3	ENSP00000344786.6		O94856-9
NFASC	ENST00000539706.6 link	c.22C>T	p.Pro8Ser	missense_variant	Exon 2 of 28	5	NM_001160331.2	ENSP00000438614.2		O94856-11

Frequencies

GnomAD3 genomes

AF:

0.000315

AC:

AN:

152202

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00580

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00949

Gnomad NFE

AF:

0.000176

Gnomad OTH

AF:

0.000956

GnomAD2 exomes

AF:

0.000537

AC:

134

AN:

249632

AF XY:

0.000696

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000174

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000213

Gnomad OTH exome

AF:

0.000818

GnomAD4 exome

AF:

0.000332

AC:

485

AN:

1461520

Hom.:

Cov.:

AF XY:

0.000411

AC XY:

299

AN XY:

727018

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33472

American (AMR)

AF:

0.000134

AC:

AN:

44704

Ashkenazi Jewish (ASJ)

AF:

0.0000383

AC:

AN:

26118

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39698

South Asian (SAS)

AF:

0.00353

AC:

304

AN:

86154

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53366

Middle Eastern (MID)

AF:

0.00175

AC:

AN:

5730

European-Non Finnish (NFE)

AF:

0.000116

AC:

129

AN:

1111908

Other (OTH)

AF:

0.000547

AC:

AN:

60370

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.471

Heterozygous variant carriers

123

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000309

AC:

AN:

152320

Hom.:

Cov.:

AF XY:

0.000443

AC XY:

AN XY:

74484

show subpopulations

African (AFR)

AF:

0.0000481

AC:

AN:

41588

American (AMR)

AF:

0.0000654

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5170

South Asian (SAS)

AF:

0.00580

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00680

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000176

AC:

AN:

68032

Other (OTH)

AF:

0.000946

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.491

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000170

Hom.:

Bravo

AF:

0.000132

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000610

AC:

Asia WGS

AF:

0.00231

AC:

AN:

3478

EpiCase

AF:

0.000218

EpiControl

AF:

0.000297

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2Benign:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Neurodevelopmental disorder with central and peripheral motor dysfunction

Uncertain:1

Feb 02, 2022

Victorian Clinical Genetics Services, Murdoch Childrens Research Institute

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Based on the classification scheme VCGS_Germline_v1.3.4, this variant is classified as VUS-3B. Following criteria are met: 0102 - Loss of function is a known mechanism of disease in this gene and is associated with neurodevelopmental disorder with central and peripheral motor dysfunction (MIM#618356). (I) 0106 - This gene is associated with autosomal recessive disease. (I) 0200 - Variant is predicted to result in a missense amino acid change from proline to serine. (I) 0252 - This variant is homozygous. (I) 0304 - Variant is present in gnomAD (v2) <0.01 for a recessive condition (138 heterozygotes, 0 homozygotes). (SP) 0502 - Missense variant with conflicting in silico predictions and uninformative conservation. (I) 0604 - Variant is not located in an established domain, motif, hotspot or informative constraint region. (I) 0705 - No comparable missense variants have previous evidence for pathogenicity. (I) 0807 - This variant has no previous evidence of pathogenicity. (I) 0905 - No published segregation evidence has been identified for this variant. (I) 1007 - No published functional evidence has been identified for this variant. (I) 1208 - Inheritance information for this variant is not currently available in this individual. (I) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign -

not provided

Uncertain:1

Jan 06, 2023

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

NFASC-related disorder

Benign:1

Nov 22, 2022

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

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.27

CADD

Benign

(source)

DANN

Uncertain

0.99

Eigen

Benign

-0.21

Eigen_PC

Benign

-0.016

FATHMM_MKL

Uncertain

0.89

LIST_S2

Uncertain

0.88

D;D;D;D;D;.;D;.;.

M_CAP

Benign

0.046

MetaRNN

Benign

0.0087

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

MetaSVM

Benign

-0.60

MutationAssessor

Benign

0.34

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

PhyloP100

2.3

PrimateAI

Benign

0.42

PROVEAN

Benign

0.92

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

REVEL

Benign

0.049

Sift

Benign

0.18

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

Sift4G

Benign

0.67

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

Polyphen

0.91

P;B;B;B;.;P;.;B;B

Vest4

0.41

MVP

0.53

MPC

0.96

ClinPred

0.036

GERP RS

5.0

gMVP

0.45

Mutation Taster

=86/14

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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1-204944337-C-T

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