GAN p.Tyr394Tyr

Variant names:

• chr16-81363886-T-T
• NM_022041.4:c.

Your query was ambiguous. Multiple possible variants found:

• chr16-81363887--
• chr16-81363889-C-T

Variant summary

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

The NM_022041.4(GAN):​c. variant causes a exon region change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: GAN NM_022041.4 exon_region
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.47
• Publications: 0 publications found

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: Orphanet, Labcorp Genetics (formerly Invitae), G2P, ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GAN	NM_022041.4	MANE Select	c.		exon_region	Exon 11 of 11	NP_071324.1	A0A0S2Z4W2
	GAN	NM_022041.4	MANE Select	c.		3_prime_UTR	Exon 11 of 11	NP_071324.1	A0A0S2Z4W2
	GAN	NM_001377486.1		c.		exon_region	Exon 10 of 10	NP_001364415.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GAN	ENST00000648994.2	MANE Select	c.		exon_region	Exon 7 of 11	ENSP00000497351.1	Q9H2C0
	GAN	ENST00000718305.1		c.		exon_region	Exon 7 of 11	ENSP00000520738.1	Q9H2C0
	GAN	ENST00000880995.1		c.		exon_region	Exon 6 of 10	ENSP00000551054.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		7.5

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr16-81397491;