Genetic Variant DARS1:p.Ser7_Arg8insAlaSer (chr2-135985447-G-GGCTGGC) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM4BP6BS1

The NM_001349.4(DARS1):c.16_21dupGCCAGC(p.Ser7_Arg8insAlaSer) variant causes a conservative inframe insertion change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00032 in 1,613,926 control chromosomes in the GnomAD database, including 2 homozygotes. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00029 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00032 ( 1 hom. )

Consequence

DARS1
NM_001349.4 conservative_inframe_insertion

Scores

Not classified

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:1

Conservation

PhyloP100: 2.18

Variant links:

Genes affected

DARS1 (HGNC:2678): (aspartyl-tRNA synthetase 1) This gene encodes a member of a multienzyme complex that functions in mediating the attachment of amino acids to their cognate tRNAs. The encoded protein ligates L-aspartate to tRNA(Asp). Mutations in this gene have been found in patients showing hypomyelination with brainstem and spinal cord involvement and leg spasticity. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jun 2014]

DARS1 links:

DARS1-AS1 (HGNC:40170): (DARS1 antisense RNA 1)

DARS1-AS1 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM4

Nonframeshift variant in NON repetitive region in NM_001349.4.

BP6

Variant 2-135985447-G-GGCTGGC is Benign according to our data. Variant chr2-135985447-G-GGCTGGC is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 808803.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=1}.

BS1

Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.000289 (44/152334) while in subpopulation SAS AF= 0.00394 (19/4826). AF 95% confidence interval is 0.00258. There are 1 homozygotes in gnomad4. There are 24 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DARS1	NM_001349.4 link	c.16_21dupGCCAGC	p.Ser7_Arg8insAlaSer	conservative_inframe_insertion	Exon 1 of 16	ENST00000264161.9	NP_001340.2	P14868-1A0A140VJW5
DARS1	NM_001293312.1 link	c.-227_-222dupGCCAGC		5_prime_UTR_variant	Exon 1 of 15		NP_001280241.1	P14868-2
DARS1-AS1	NR_110199.1 link	n.284_289dupCGCTGG		non_coding_transcript_exon_variant	Exon 1 of 4
DARS1-AS1	NR_110200.1 link	n.284_289dupCGCTGG		non_coding_transcript_exon_variant	Exon 1 of 4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DARS1	ENST00000264161.9 link	c.16_21dupGCCAGC	p.Ser7_Arg8insAlaSer	conservative_inframe_insertion	Exon 1 of 16	1	NM_001349.4	ENSP00000264161.4		P14868-1

Frequencies

GnomAD3 genomes

AF:

0.000289

AC:

AN:

152216

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00393

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000250

Gnomad OTH

AF:

0.000957

GnomAD3 exomes

AF:

0.000520

AC:

130

AN:

250022

Hom.:

AF XY:

0.000679

AC XY:

AN XY:

135398

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000868

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00330

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000222

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.000324

AC:

473

AN:

1461592

Hom.:

Cov.:

AF XY:

0.000430

AC XY:

313

AN XY:

727132

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00381

Gnomad4 FIN exome

AF:

0.0000751

Gnomad4 NFE exome

AF:

0.0000935

Gnomad4 OTH exome

AF:

0.000398

GnomAD4 genome

AF:

0.000289

AC:

AN:

152334

Hom.:

Cov.:

AF XY:

0.000322

AC XY:

AN XY:

74482

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.000261

Gnomad4 ASJ

AF:

0.000288

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00394

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000250

Gnomad4 OTH

AF:

0.000947

Alfa

AF:

0.000217

Hom.:

Bravo

AF:

0.000159

EpiCase

AF:

0.000382

EpiControl

AF:

0.000356

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:1

Oct 14, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jun 01, 2016

CeGaT Center for Human Genetics Tuebingen

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over