Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM2PP2PP3_StrongPP5

The NM_022041.4(GAN):c.505G>A(p.Glu169Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 11/19 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: not found (cov: 32)

Consequence

GAN
NM_022041.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity no assertion criteria provided P:1U:1

Conservation

PhyloP100: 9.60

Publications

3 publications found

Variant links:

Genes affected

GAN (HGNC:4137): (gigaxonin) This gene encodes a member of the cytoskeletal BTB/kelch (Broad-Complex, Tramtrack and Bric a brac) repeat family. The encoded protein plays a role in neurofilament architecture and is involved in mediating the ubiquitination and degradation of some proteins. Defects in this gene are a cause of giant axonal neuropathy (GAN). [provided by RefSeq, Oct 2008]

GAN Gene-Disease associations (from GenCC):

giant axonal neuropathy 1
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Labcorp Genetics (formerly Invitae), ClinGen, Orphanet

GAN links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 11 curated pathogenic missense variants (we use a threshold of 10). The gene has 3 curated benign missense variants. Trascript score misZ: -2.0288 (below the threshold of 3.09). GenCC associations: The gene is linked to giant axonal neuropathy 1.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.987

PP5

Variant 16-81354627-G-A is Pathogenic according to our data. Variant chr16-81354627-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 5038.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_022041.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GAN	NM_022041.4	MANE Select	c.505G>A	p.Glu169Lys	missense	Exon 3 of 11	NP_071324.1
	GAN	NM_001377486.1		c.-135G>A		5_prime_UTR	Exon 2 of 10	NP_001364415.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
GAN	ENST00000648994.2	MANE Select	c.505G>A	p.Glu169Lys	missense	Exon 3 of 11	ENSP00000497351.1
GAN	ENST00000718305.1		c.505G>A	p.Glu169Lys	missense	Exon 3 of 11	ENSP00000520738.1
GAN	ENST00000648349.3		n.*213G>A		non_coding_transcript_exon	Exon 2 of 10	ENSP00000498114.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Cov.:

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ClinVar

ClinVar submissions as Germline

Significance:Conflicting classifications of pathogenicity

Revision:no assertion criteria provided

View on ClinVar

Pathogenic

VUS

Benign

Condition

Giant axonal neuropathy 1 (2)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

1.0

BayesDel_addAF

Pathogenic

0.48

BayesDel_noAF

Pathogenic

0.45

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.79

Eigen

Pathogenic

1.0

Eigen_PC

Pathogenic

1.0

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.95

M_CAP

Uncertain

0.16

MetaRNN

Pathogenic

0.99

MetaSVM

Uncertain

0.48

MutationAssessor

Pathogenic

3.4

PhyloP100

9.6

PrimateAI

Pathogenic

0.80

Sift4G

Uncertain

0.028

Polyphen

1.0

Vest4

0.94

MutPred

0.95

Gain of ubiquitination at E169 (P = 0.023)

MVP

0.95

MPC

0.59

ClinPred

1.0

GERP RS

6.0

Varity_R

0.95

gMVP

0.69

Mutation Taster

=0/100

disease causing (ClinVar)

(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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

ClinVar submissions as Germline

Computational scores

Splicing

Publications

Other links and lift over