Is DARS2 p.Arg609Trp (c.1825C>T) pathogenic?

DARS2 p.Arg609Trp (c.1825C>T) is classified Uncertain significance in DARS2 (ClinVar, Multiple submitters, 6 submitters; last evaluated 2025-01-22). AlphaMissense: likely benign (0.1803); Very rare (popmax 0.00549%, sas); Associated with leukoencephalopathy with brain stem and spinal cord involvement-high lactate syndrome.

How common is DARS2 p.Arg609Trp (c.1825C>T) in the general population?

DARS2 p.Arg609Trp (c.1825C>T) is very rare (popmax 0.00549%, sas) (gnomAD).

What do computational predictors say about DARS2 p.Arg609Trp (c.1825C>T)?

AlphaMissense predicts likely benign (score 0.1803) — an in-silico prediction, not a clinical call.

DARS2 p.Arg609Trp

Q: What condition is associated with DARS2 p.Arg609Trp (c.1825C>T)?

DARS2 p.Arg609Trp (c.1825C>T) is associated with leukoencephalopathy with brain stem and spinal cord involvement-high lactate syndrome (ClinVar).

Q: How is Leukoencephalopathy with brain stem and spinal cord involvement-high lactate syndrome inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

c.1825C>T · rs200670286 · VCV30863

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 6 submitters

AlphaMissense

likely benign

0.1803 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00549%, sas)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

leukoencephalopathy with brain stem and spinal cord involvement-high lactate syndrome

Computational evidence

Protein change
AlphaMissense	0.1803	likely benign
REVEL	0.77	pathogenic-leaning
SaProt	LLR -7.48	tolerated
⇒ REVEL calls this damaging; AlphaMissense and SaProt do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 6.1	GERP 1.9, phastCons 1
Regional constraint	o/e 0.87	unconstrained · MANE · 32 kb · p 0.00036 · regional, not allelic
Overall
CADD	32.0	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00549% South Asian · 5/91,092 alleles

Filtering AF 0.0021% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00136%

Overall 0.00211% 34/1,614,002 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00549%	18,218
East Asian	0.00445%	22,450
European (non-Finnish)	0.0022%	45,385
Remaining individualsnot grpmax-eligible	0.0016%	62,482

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: DARS2
Protein: p.Arg609Trp
Coding: c.1825C>T
MANE Select: NM_018122
dbSNP: rs200670286
Type: single nucleotide variant
Location: chr1:173857592 (GRCh38)
Gene constraint: LOEUF 0.923 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 88.91 · 1 PDB

Full DARS2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

leukoencephalopathy with brain stem and spinal cord involvement-high lactate syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Leukoencephalopathy with brain stem and spinal cord involvement-high lactate syndrome (Orphanet):

Inheritance: Autosomal recessive
Onset: Adolescent, Adult, Antenatal, Childhood, Infancy, Neonatal

Similar variants

DARS2 c.228-15C>A Pathogenic/Likely pathogenic ★★ same condition
DARS2 c.228-16C>A Pathogenic/Likely pathogenic ★★ same condition
DARS2 c.397-2A>G Pathogenic/Likely pathogenic ★★ same condition
DARS2 c.492+2T>C Pathogenic ★★ same condition
DARS2 c.493-1G>C Likely pathogenic ★★ same condition
DARS2 p.Ala262Val Likely pathogenic ★★ ⚠ same condition
DARS2 p.Arg179His Pathogenic/Likely pathogenic ★★ same condition
DARS2 p.Arg188Ter Pathogenic/Likely pathogenic ★★ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/dars2-p-arg609trp (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown