NM_001389617.1:c.983G>C

Variant names:

• chr1-201648790-G-C
• rs1337229622
• NM_001389617.1:c.983G>C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001389617.1(NAV1):​c.983G>C​(p.Gly328Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: NAV1 NM_001389617.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.146

Genes affected

NAV1 (HGNC:15989): (neuron navigator 1) This gene belongs to the neuron navigator family and is expressed predominantly in the nervous system. The encoded protein contains coiled-coil domains and a conserved AAA domain characteristic for ATPases associated with a variety of cellular activities. This gene is similar to unc-53, a Caenorhabditis elegans gene involved in axon guidance. The exact function of this gene is not known, but it is thought to play a role in in neuronal development and regeneration. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.12292278).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NAV1	NM_001389617.1	c.983G>C	p.Gly328Ala	missense_variant	Exon 5 of 34	ENST00000685211.1	NP_001376546.1
NAV1	NM_001389616.1	c.983G>C	p.Gly328Ala	missense_variant	Exon 4 of 32		NP_001376545.1
NAV1	NM_001389615.1	c.983G>C	p.Gly328Ala	missense_variant	Exon 5 of 31		NP_001376544.1
NAV1	NM_020443.5	c.122G>C	p.Gly41Ala	missense_variant	Exon 1 of 30		NP_065176.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NAV1	ENST00000685211.1	c.983G>C	p.Gly328Ala	missense_variant	Exon 5 of 34		NM_001389617.1	ENSP00000510803.1
NAV1	ENST00000367296.8	c.122G>C	p.Gly41Ala	missense_variant	Exon 1 of 30	5		ENSP00000356265.4
NAV1	ENST00000367302.5	c.161G>C	p.Gly54Ala	missense_variant	Exon 3 of 30	5		ENSP00000356271.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1361040 Hom.: 0 Cov.: 53 AF XY: 0.00 AC XY: 0 AN XY: 670066

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jul 26, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.122G>C (p.G41A) alteration is located in exon 1 (coding exon 1) of the NAV1 gene. This alteration results from a G to C substitution at nucleotide position 122, causing the glycine (G) at amino acid position 41 to be replaced by an alanine (A). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.079
BayesDel_addAF	Benign	-0.31	T
BayesDel_noAF	Benign	-0.68
CADD	Benign	16
DANN	Benign	0.96
DEOGEN2	Benign	0.014	.;T
Eigen	Benign	-0.57
Eigen_PC	Benign	-0.43
FATHMM_MKL	Benign	0.49	N
LIST_S2	Benign	0.70	T;T
M_CAP	Pathogenic	0.40	D
MetaRNN	Benign	0.12	T;T
MetaSVM	Benign	-0.97	T
MutationAssessor	Benign	0.34	.;N
PrimateAI	Pathogenic	0.87	D
PROVEAN	Benign	-0.14	N;N
REVEL	Benign	0.062
Sift	Uncertain	0.028	D;D
Sift4G	Benign	0.50	T;T
Vest4		0.12
MutPred		0.13		.;Loss of loop (P = 0.0128);
MVP		0.17
MPC		1.0
ClinPred		0.074	T
GERP RS		-0.11
Varity_R		0.087
gMVP		0.25

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: rs1337229622; hg19: chr1-201617918;