7-30612107-C-T

Variant names:

• chr7-30612107-C-T
• rs137852648
• NM_002047.4:c.893C>T

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PM1 PM2 PM5 PP3_Strong PP5

The NM_002047.4(GARS1):​c.893C>T​(p.Pro298Leu) 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. 12/21 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P298R) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: GARS1 NM_002047.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity no assertion criteria provided P:1 U:1 O:1
• Conservation: PhyloP100: 7.79
• Publications: 18 publications found

Genes affected

GARS1 (HGNC:4162): (glycyl-tRNA synthetase 1) This gene encodes glycyl-tRNA synthetase, one of the aminoacyl-tRNA synthetases that charge tRNAs with their cognate amino acids. The encoded enzyme is an (alpha)2 dimer which belongs to the class II family of tRNA synthetases. It has been shown to be a target of autoantibodies in the human autoimmune diseases, polymyositis or dermatomyositis. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2015]

GARS1 Gene-Disease associations (from GenCC):

• Charcot-Marie-Tooth disease type 2D

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), Orphanet
• neuronopathy, distal hereditary motor, type 5A

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Illumina, Laboratory for Molecular Medicine
• spinal muscular atrophy, infantile, James type

  Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics

ACMG classification

Our verdict: Pathogenic. The variant received 11 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 4 uncertain in NM_002047.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr7-30612107-C-G is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 3602190.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.995
• PP5: Variant 7-30612107-C-T is Pathogenic according to our data. Variant chr7-30612107-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 9209.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002047.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GARS1	NM_002047.4	MANE Select	c.893C>T	p.Pro298Leu	missense	Exon 8 of 17	NP_002038.2
	GARS1	NM_001316772.1		c.731C>T	p.Pro244Leu	missense	Exon 8 of 17	NP_001303701.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GARS1	ENST00000389266.8	TSL:1 MANE Select	c.893C>T	p.Pro298Leu	missense	Exon 8 of 17	ENSP00000373918.3
	GARS1	ENST00000675651.1		c.893C>T	p.Pro298Leu	missense	Exon 8 of 17	ENSP00000502513.1
	GARS1	ENST00000675810.1		c.791C>T	p.Pro264Leu	missense	Exon 7 of 16	ENSP00000502743.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1 Uncertain:1 Other:1

Revision: no assertion criteria provided

Submissions by phenotype

Charcot-Marie-Tooth disease type 2D Pathogenic:1 Uncertain:1 Other:1

GeneReviews

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

GARS1-HMSN (CMT2D & dSMA-V) [Abe & Hayasaka 2009, Griffin et al 2014]

May 01, 2009

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Jan 06, 2016

Inherited Neuropathy Consortium Ii, University Of Miami

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: literature only

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.37
CADD	Pathogenic	32
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.94	D
Eigen	Pathogenic	0.91
Eigen_PC	Pathogenic	0.82
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Pathogenic	1.0	D
M_CAP	Pathogenic	0.63	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Uncertain	0.75	D
PhyloP100		7.8
PrimateAI	Pathogenic	0.88	D
PROVEAN	Pathogenic	-9.1	D
REVEL	Pathogenic	0.85
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.97
MutPred		0.97		Loss of disorder (P = 0.0596)
MVP		0.91
MPC		1.1
ClinPred		1.0	D
GERP RS		4.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.2
Varity_R		0.99
gMVP		0.91
Mutation Taster		=8/92	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs137852648; hg19: chr7-30651723;