1-173825240-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_018122.5(DARS2):c.11C>G(p.Pro4Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: DARS2 NM_018122.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.0280

Genes affected

DARS2 (HGNC:25538): (aspartyl-tRNA synthetase 2, mitochondrial) The protein encoded by this gene belongs to the class-II aminoacyl-tRNA synthetase family. It is a mitochondrial enzyme that specifically aminoacylates aspartyl-tRNA. Mutations in this gene are associated with leukoencephalopathy with brainstem and spinal cord involvement and lactate elevation (LBSL). [provided by RefSeq, Nov 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.08271214).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DARS2	NM_018122.5	c.11C>G	p.Pro4Arg	missense_variant	1/17	ENST00000649689.2
DARS2	NM_001365212.1	c.11C>G	p.Pro4Arg	missense_variant	1/16
DARS2	NM_001365213.2	c.11C>G	p.Pro4Arg	missense_variant	1/14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DARS2	ENST00000649689.2	c.11C>G	p.Pro4Arg	missense_variant	1/17		NM_018122.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 30, 2021

The c.11C>G (p.P4R) alteration is located in exon 1 (coding exon 1) of the DARS2 gene. This alteration results from a C to G substitution at nucleotide position 11, causing the proline (P) at amino acid position 4 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.085
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.39
Cadd	Benign	6.8
Dann	Benign	0.72
DEOGEN2	Benign	0.031	T;.;.;.;T;.;.
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.035	N
M_CAP	Benign	0.031	D
MetaRNN	Benign	0.083	T;T;T;T;T;T;T
MetaSVM	Benign	-0.92	T
MutationAssessor	Benign	0.46	N;.;.;.;N;.;.
MutationTaster	Benign	1.0	N;N
PrimateAI	Benign	0.27	T
PROVEAN	Benign	0.20	N;.;.;.;.;.;.
REVEL	Benign	0.21
Sift	Benign	0.27	T;.;.;.;.;.;.
Sift4G	Uncertain	0.060	T;.;.;.;.;.;.
Polyphen		0.0	B;.;.;.;B;.;.
Vest4		0.077
MutPred		0.39		Gain of MoRF binding (P = 0.0026);Gain of MoRF binding (P = 0.0026);Gain of MoRF binding (P = 0.0026);Gain of MoRF binding (P = 0.0026);Gain of MoRF binding (P = 0.0026);Gain of MoRF binding (P = 0.0026);Gain of MoRF binding (P = 0.0026);
MVP		0.66
MPC		0.25
ClinPred		0.21	T
GERP RS		-0.37
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.034
gMVP		0.49

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-173794378;