rs7538403

Positions:

• chr1-204956805-G-A

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BS1 BS2

The NM_001005388.3(NFASC):​c.536-851G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.014 in 152,142 control chromosomes in the GnomAD database, including 44 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.014 (44 hom., cov: 32)
• Consequence: NFASC NM_001005388.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.148

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]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.78).
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.014 (2129/152142) while in subpopulation AFR AF= 0.0483 (2007/41514). AF 95% confidence interval is 0.0466. There are 44 homozygotes in gnomad4. There are 1017 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 44 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NFASC	NM_001005388.3	c.536-851G>A		intron_variant		ENST00000339876.11
NFASC	NM_001160331.2	c.518-851G>A		intron_variant		ENST00000539706.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NFASC	ENST00000339876.11	c.536-851G>A		intron_variant		5	NM_001005388.3
NFASC	ENST00000539706.6	c.518-851G>A		intron_variant		5	NM_001160331.2	A2

Frequencies

GnomAD3 genomes AF: 0.0140 AC: 2124 AN: 152026 Hom.: 43 Cov.: 32

Gnomad AFR AF: 0.0483

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00642

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00949

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.00907

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.0140 AC: 2129 AN: 152142 Hom.: 44 Cov.: 32 AF XY: 0.0137 AC XY: 1017 AN XY: 74370

Gnomad4 AFR AF: 0.0483

Gnomad4 AMR AF: 0.00641

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000441

Gnomad4 OTH AF: 0.00899

Alfa AF: 0.0112 Hom.: 8

Bravo AF: 0.0164

Asia WGS AF: 0.00202 AC: 7 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.78
CADD	Benign	1.5
DANN	Benign	0.75

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: rs7538403; hg19: chr1-204925933;