1-204944382-G-A

Position:

chr1-204944382-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 3P and 3B. PM2PP2BP4_ModerateBS1_Supporting

The NM_001005388.3(NFASC):c.67G>A(p.Gly23Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00019 in 1,608,018 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000085 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00020 ( 1 hom. )

Consequence

NFASC
NM_001005388.3 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 0.541

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), NFASC. . Gene score misZ 2.5875 (greater than the threshold 3.09). Trascript score misZ 3.5105 (greater than threshold 3.09). GenCC has associacion of gene with neurodevelopmental disorder with central and peripheral motor dysfunction.

BP4

Computational evidence support a benign effect (MetaRNN=0.13341126).

BS1

Variant frequency is greater than expected in population nfe. gnomad4_exome allele frequency = 0.000201 (293/1455770) while in subpopulation NFE AF= 0.000244 (271/1108974). AF 95% confidence interval is 0.00022. There are 1 homozygotes in gnomad4_exome. There are 125 alleles in male gnomad4_exome subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NFASC	NM_001005388.3 linkuse as main transcript	c.67G>A	p.Gly23Arg	missense_variant	3/30	ENST00000339876.11
NFASC	NM_001160331.2 linkuse as main transcript	c.67G>A	p.Gly23Arg	missense_variant	2/28	ENST00000539706.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NFASC	ENST00000339876.11 linkuse as main transcript	c.67G>A	p.Gly23Arg	missense_variant	3/30	5	NM_001005388.3		O94856-9
NFASC	ENST00000539706.6 linkuse as main transcript	c.67G>A	p.Gly23Arg	missense_variant	2/28	5	NM_001160331.2	A2	O94856-11

Frequencies

GnomAD3 genomes

AF:

0.0000920

AC:

AN:

152130

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.000162

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000102

AC:

AN:

244664

Hom.:

AF XY:

0.000128

AC XY:

AN XY:

132634

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000123

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000558

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000468

Gnomad NFE exome

AF:

0.000162

Gnomad OTH exome

AF:

0.000168

GnomAD4 exome

AF:

0.000201

AC:

293

AN:

1455770

Hom.:

Cov.:

AF XY:

0.000173

AC XY:

125

AN XY:

723796

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000116

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000152

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.0000188

Gnomad4 NFE exome

AF:

0.000244

Gnomad4 OTH exome

AF:

0.000133

GnomAD4 genome

AF:

0.0000854

AC:

AN:

152248

Hom.:

Cov.:

AF XY:

0.0000537

AC XY:

AN XY:

74460

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.0000653

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000229

Hom.:

Bravo

AF:

0.000200

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00104

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000741

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000237

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 26, 2021

The c.67G>A (p.G23R) alteration is located in exon 3 (coding exon 1) of the NFASC gene. This alteration results from a G to A substitution at nucleotide position 67, causing the glycine (G) at amino acid position 23 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jul 06, 2022

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 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.17

BayesDel_noAF

Benign

-0.22

CADD

Benign

DANN

Uncertain

0.98

Eigen

Benign

-0.66

Eigen_PC

Benign

-0.65

FATHMM_MKL

Benign

0.022

LIST_S2

Benign

0.78

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

M_CAP

Benign

0.063

MetaRNN

Benign

0.13

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

MetaSVM

Benign

-0.72

MutationAssessor

Benign

0.34

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

MutationTaster

Benign

1.0

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

PrimateAI

Uncertain

0.53

PROVEAN

Benign

-1.2

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

REVEL

Benign

0.085

Sift

Uncertain

0.015

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

Sift4G

Uncertain

0.0060

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

Polyphen

0.013

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

Vest4

0.37

MutPred

0.63

Gain of solvent accessibility (P = 0.0456);Gain of solvent accessibility (P = 0.0456);Gain of solvent accessibility (P = 0.0456);Gain of solvent accessibility (P = 0.0456);Gain of solvent accessibility (P = 0.0456);Gain of solvent accessibility (P = 0.0456);Gain of solvent accessibility (P = 0.0456);Gain of solvent accessibility (P = 0.0456);Gain of solvent accessibility (P = 0.0456);

MVP

0.63

MPC

0.47

ClinPred

0.058

GERP RS

1.4

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over