12-32731118-C-G

Variant names:

• chr12-32731118-C-G
• rs121908531
• NM_001278464.2:c.1223C>G

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM1 PM2 PM5 PP2 PP3

The NM_012062.5(DNM1L):​c.1184C>G​(p.Ala395Gly) 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. 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. A395D) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: DNM1L NM_012062.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.71
• Publications: 51 publications found

Genes affected

DNM1L (HGNC:2973): (dynamin 1 like) This gene encodes a member of the dynamin superfamily of GTPases. The encoded protein mediates mitochondrial and peroxisomal division, and is involved in developmentally regulated apoptosis and programmed necrosis. Dysfunction of this gene is implicated in several neurological disorders, including Alzheimer's disease. Mutations in this gene are associated with the autosomal dominant disorder, encephalopathy, lethal, due to defective mitochondrial and peroxisomal fission (EMPF). Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jun 2013]

YARS2 (HGNC:24249): (tyrosyl-tRNA synthetase 2) This gene encodes a mitochondrial protein that catalyzes the attachment of tyrosine to tRNA(Tyr). Mutations in this gene are associated with myopathy with lactic acidosis and sideroblastic anemia type 2 (MLASA2). [provided by RefSeq, Jan 2011]

YARS2 Gene-Disease associations (from GenCC):

• myopathy, lactic acidosis, and sideroblastic anemia 2

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
• myopathy, lactic acidosis, and sideroblastic anemia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 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, 4 uncertain in NM_012062.5
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr12-32731118-C-A is described in ClinVar as Pathogenic. ClinVar VariationId is 6015.Status of the report is no_assertion_criteria_provided, 0 stars.
• PP2: Missense variant in the DNM1L gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 31 curated pathogenic missense variants (we use a threshold of 10). The gene has 9 curated benign missense variants. Gene score misZ: 3.8282 (above the threshold of 3.09). Trascript score misZ: 5.3198 (above the threshold of 3.09). GenCC associations: The gene is linked to encephalopathy, lethal, due to defective mitochondrial peroxisomal fission 1, optic atrophy 5, autosomal dominant optic atrophy, classic form, Leigh syndrome, encephalopathy due to mitochondrial and peroxisomal fission defect.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.816

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_012062.5. 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
	DNM1L	NM_001278464.2	MANE Plus Clinical	c.1223C>G	p.Ala408Gly	missense	Exon 11 of 21	NP_001265393.1	O00429-6
	DNM1L	NM_012062.5	MANE Select	c.1184C>G	p.Ala395Gly	missense	Exon 10 of 20	NP_036192.2	O00429-1
	DNM1L	NM_001278465.2		c.1223C>G	p.Ala408Gly	missense	Exon 11 of 20	NP_001265394.1	O00429-8

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DNM1L	ENST00000553257.6	TSL:2 MANE Plus Clinical	c.1223C>G	p.Ala408Gly	missense	Exon 11 of 21	ENSP00000449089.1	O00429-6
	DNM1L	ENST00000549701.6	TSL:1 MANE Select	c.1184C>G	p.Ala395Gly	missense	Exon 10 of 20	ENSP00000450399.1	O00429-1
	DNM1L	ENST00000381000.8	TSL:1	c.1223C>G	p.Ala408Gly	missense	Exon 11 of 20	ENSP00000370388.4	O00429-8

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.25	D
BayesDel_noAF	Uncertain	0.13
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.95	D
Eigen	Pathogenic	0.93
Eigen_PC	Pathogenic	0.83
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Uncertain	0.20	D
MetaRNN	Pathogenic	0.82	D
MetaSVM	Uncertain	0.66	D
MutationAssessor	Pathogenic	3.6	H
PhyloP100		7.7
PrimateAI	Pathogenic	0.87	D
PROVEAN	Uncertain	-3.8	D
REVEL	Pathogenic	0.81
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0070	D
Polyphen		1.0	D
Vest4		0.59
MutPred		0.73		Gain of catalytic residue at T394 (P = 0.0057)
MVP		0.89
MPC		2.3
ClinPred		1.0	D
GERP RS		4.9
Varity_R		0.95
gMVP		0.92
Mutation Taster		=0/100	disease causing

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: rs121908531; hg19: chr12-32884052;