9-91298021-ACC-CCG

Variant names:

• chr9-91298021-ACC-CCG
• NM_001698.3:c.559_561delGGTinsCGG
• AUH p.Gly187Arg

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM1 PM5

The NM_001698.3(AUH):​c.559_561delGGTinsCGG​(p.Gly187Arg) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type MNV, and the frequency of such variant types in population databases may be underestimated and unreliable. 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. G187S) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: AUH NM_001698.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.89
• Publications: 0 publications found

Genes affected

AUH (HGNC:890): (AU RNA binding methylglutaconyl-CoA hydratase) This gene encodes bifunctional mitochondrial protein that has both RNA-binding and hydratase activities. The encoded protein is a methylglutaconyl-CoA hydratase that catalyzes the hydration of 3-methylglutaconyl-CoA to 3-hydroxy-3-methyl-glutaryl-CoA, a critical step in the leucine degradation pathway. This protein also binds AU-rich elements (AREs) found in the 3' UTRs of rapidly decaying mRNAs including c-fos, c-myc and granulocyte/ macrophage colony stimulating factor. ARE elements are involved in directing RNA to rapid degradation and deadenylation. This protein is localizes to the mitochondrial matrix and the inner mitochondrial membrane and may be involved in mitochondrial protein synthesis. Mutations in this gene are the cause of 3-methylglutaconic aciduria, type I. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2015]

AUH Gene-Disease associations (from GenCC):

• 3-methylglutaconic aciduria type 1

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_001698.3
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr9-91298023-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 30079.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001698.3. 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
	AUH	NM_001698.3	MANE Select	c.559_561delGGTinsCGG	p.Gly187Arg	missense	N/A	NP_001689.1	Q13825-1
	AUH	NM_001306190.2		c.472_474delGGTinsCGG	p.Gly158Arg	missense	N/A	NP_001293119.1	Q13825-2
	AUH	NM_001351431.2		c.232_234delGGTinsCGG	p.Gly78Arg	missense	N/A	NP_001338360.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AUH	ENST00000375731.9	TSL:1 MANE Select	c.559_561delGGTinsCGG	p.Gly187Arg	missense	N/A	ENSP00000364883.5	Q13825-1
	AUH	ENST00000303617.5	TSL:1	c.472_474delGGTinsCGG	p.Gly158Arg	missense	N/A	ENSP00000307334.5	Q13825-2
	AUH	ENST00000895926.1		c.589_591delGGTinsCGG	p.Gly197Arg	missense	N/A	ENSP00000565985.1

Frequencies

GnomAD3 genomes Cov.: 32

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

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		5.9

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: chr9-94060303;