chr22-41507953-C-G

Variant names:

• chr22-41507953-C-G
• rs786200924
• NM_001098.3:c.336C>G

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM2 PP3_Moderate PP5

The NM_001098.3(ACO2):​c.336C>G​(p.Ser112Arg) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S112G) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ACO2 NM_001098.3 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:2
• Conservation: PhyloP100: 5.80
• Publications: 14 publications found

Genes affected

ACO2 (HGNC:118): (aconitase 2) The protein encoded by this gene belongs to the aconitase/IPM isomerase family. It is an enzyme that catalyzes the interconversion of citrate to isocitrate via cis-aconitate in the second step of the TCA cycle. This protein is encoded in the nucleus and functions in the mitochondrion. It was found to be one of the mitochondrial matrix proteins that are preferentially degraded by the serine protease 15(PRSS15), also known as Lon protease, after oxidative modification. [provided by RefSeq, Jul 2008]

ACO2 Gene-Disease associations (from GenCC):

• infantile cerebellar-retinal degeneration

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae)
• optic atrophy 9

  Inheritance: Unknown, AD, AR Classification: STRONG, MODERATE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
• autosomal recessive optic atrophy

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.857
• PP5: Variant 22-41507953-C-G is Pathogenic according to our data. Variant chr22-41507953-C-G is described in ClinVar as Pathogenic. ClinVar VariationId is 29584.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ACO2	NM_001098.3	c.336C>G	p.Ser112Arg	missense_variant	Exon 3 of 18	ENST00000216254.9	NP_001089.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ACO2	ENST00000216254.9	c.336C>G	p.Ser112Arg	missense_variant	Exon 3 of 18	1	NM_001098.3	ENSP00000216254.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: no assertion criteria provided

Submissions by phenotype

Infantile cerebellar-retinal degeneration Pathogenic:2

Mar 09, 2012

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Aug 01, 2019

Section for Clinical Neurogenetics, University of Tübingen

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: research

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.090
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.59	D;.
Eigen	Pathogenic	0.76
Eigen_PC	Pathogenic	0.71
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	0.99	D;D
M_CAP	Uncertain	0.14	D
MetaRNN	Pathogenic	0.86	D;D
MetaSVM	Benign	-0.35	T
MutationAssessor	Uncertain	2.1	M;.
PhyloP100		5.8
PrimateAI	Pathogenic	0.83	D
PROVEAN	Pathogenic	-4.7	D;D
REVEL	Uncertain	0.53
Sift	Uncertain	0.0020	D;D
Sift4G	Uncertain	0.0080	D;D
Polyphen		0.98	D;D
Vest4		0.86
MutPred		0.56		Gain of MoRF binding (P = 0.0194);Gain of MoRF binding (P = 0.0194);
MVP		0.79
MPC		1.7
ClinPred		0.99	D
GERP RS		5.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.93
gMVP		0.91
Mutation Taster		=9/91	disease causing (ClinVar)

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: rs786200924; hg19: chr22-41903957;