12-77968636-G-C

Variant names:

• chr12-77968636-G-C
• rs771641910
• NM_001024383.2:c.605G>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001024383.2(NAV3):​c.605G>C​(p.Arg202Pro) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R202Q) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: NAV3 NM_001024383.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.79
• Publications: 0 publications found

Genes affected

NAV3 (HGNC:15998): (neuron navigator 3) 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. Multiple alternatively spliced transcript variants for this gene have been described but only one has had its full-length nature determined. [provided by RefSeq, Jul 2008]

NAV3 Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AR Classification: DEFINITIVE Submitted by: Ambry Genetics
• neurodevelopmental disorder

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.14634785).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001024383.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NAV3	NM_001024383.2	MANE Select	c.605G>C	p.Arg202Pro	missense	Exon 5 of 40	NP_001019554.1	Q8IVL0-1
	NAV3	NM_014903.6		c.605G>C	p.Arg202Pro	missense	Exon 5 of 39	NP_055718.4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NAV3	ENST00000397909.7	TSL:1 MANE Select	c.605G>C	p.Arg202Pro	missense	Exon 5 of 40	ENSP00000381007.2	Q8IVL0-1
	NAV3	ENST00000536525.6	TSL:1	c.605G>C	p.Arg202Pro	missense	Exon 5 of 39	ENSP00000446132.2	Q8IVL0-2
	NAV3	ENST00000549464.5	TSL:5	c.605G>C	p.Arg202Pro	missense	Exon 5 of 10	ENSP00000446628.1	F8VZV4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Benign	-0.033	T
BayesDel_noAF	Benign	-0.29
CADD	Benign	22
DANN	Uncertain	0.98
DEOGEN2	Benign	0.0024	T
Eigen	Benign	-0.34
Eigen_PC	Benign	-0.26
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Benign	0.75	T
M_CAP	Benign	0.012	T
MetaRNN	Benign	0.15	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.69	N
PhyloP100		4.8
PrimateAI	Benign	0.40	T
PROVEAN	Benign	0.39	N
REVEL	Benign	0.16
Sift	Benign	0.35	T
Sift4G	Benign	0.36	T
Polyphen		0.0	B
Vest4		0.30
MutPred		0.30		Loss of helix (P = 0.0626)
MVP		0.27
MPC		0.26
ClinPred		0.34	T
GERP RS		3.5
Varity_R		0.17
gMVP		0.29
Mutation Taster		=69/31	polymorphism

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

Other links and lift over

dbSNP: rs771641910; hg19: chr12-78362416;