chr12-32731021-G-A

Position:

• chr12-32731021-G-A

Variant summary

Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PM1 PM2 PM5 PP2 PP3_Moderate PP5_Moderate

The NM_001278464.2(DNM1L):​c.1126G>A​(p.Gly376Ser) 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. Variant has been reported in ClinVar as Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G376D) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: DNM1L NM_001278464.2 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 9.74

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]

ACMG classification

Verdict is Pathogenic. Variant got 11 ACMG points.

• PM1: In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 2 uncertain in NM_001278464.2
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr12-32731022-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 1299486.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), DNM1L. . Gene score misZ 3.8282 (greater than the threshold 3.09). Trascript score misZ 5.2186 (greater than threshold 3.09). GenCC has associacion of gene with encephalopathy, lethal, due to defective mitochondrial peroxisomal fission 1, encephalopathy due to mitochondrial and peroxisomal fission defect, optic atrophy 5, Leigh syndrome, autosomal dominant optic atrophy, classic form.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.914
• PP5: Variant 12-32731021-G-A is Pathogenic according to our data. Variant chr12-32731021-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 976414.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DNM1L	NM_001278464.2	c.1126G>A	p.Gly376Ser	missense_variant	11/21	ENST00000553257.6
DNM1L	NM_012062.5	c.1087G>A	p.Gly363Ser	missense_variant	10/20	ENST00000549701.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DNM1L	ENST00000553257.6	c.1126G>A	p.Gly376Ser	missense_variant	11/21	2	NM_001278464.2
DNM1L	ENST00000549701.6	c.1087G>A	p.Gly363Ser	missense_variant	10/20	1	NM_012062.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Encephalopathy, lethal, due to defective mitochondrial peroxisomal fission 1 Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Institute of Human Genetics, University of Leipzig Medical Center

Feb 19, 2021

This variant was identified as de novo (maternity and paternity confirmed). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.37
CADD	Pathogenic	31
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.91	.;.;.;D;D;.;.;.
Eigen	Pathogenic	0.98
Eigen_PC	Pathogenic	0.87
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	1.0	D;D;D;D;D;D;D;D
M_CAP	Uncertain	0.26	D
MetaRNN	Pathogenic	0.91	D;D;D;D;D;D;D;D
MetaSVM	Pathogenic	0.80	D
MutationAssessor	Pathogenic	3.8	H;.;.;H;.;H;H;.
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;D
PrimateAI	Pathogenic	0.82	D
PROVEAN	Pathogenic	-5.5	D;D;D;D;D;D;D;D
REVEL	Pathogenic	0.91
Sift	Pathogenic	0.0	D;D;D;D;D;D;D;D
Sift4G	Pathogenic	0.0010	D;D;D;D;D;D;D;D
Polyphen		1.0	.;.;.;D;.;.;.;.
Vest4		0.80
MutPred		0.77		Gain of catalytic residue at R365 (P = 0);.;.;Gain of catalytic residue at R365 (P = 0);.;Gain of catalytic residue at R365 (P = 0);Gain of catalytic residue at R365 (P = 0);.;
MVP		0.93
MPC		2.3
ClinPred		1.0	D
GERP RS		4.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.97
gMVP		0.97

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.18		Details are displayed if max score is > 0.2

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

Publications

LitVar

Other links and lift over

dbSNP: rs1954520736; hg19: chr12-32883955;