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NM_001933.5:c.236C>T
p.Ala79Val · DLST
ACMG/AMP
0%
complete
Final classification
VUS
PM2
DLST
c.236C>T
p.Ala79Val
missense · exon 5
Gene context NCBI Gene ↗

DLST encodes a mitochondrial protein that forms part of the 2-oxoglutarate dehydrogenase complex, which helps convert 2-oxoglutarate into succinyl-CoA and carbon dioxide as part of cellular energy production. It has been associated with disease through disruption of mitochondrial energy metabolism. No established role in cancer is known.

This variant

DLST encodes a mitochondrial component of the 2-oxoglutarate dehydrogenase complex involved in cellular energy production, and disruption may affect mitochondrial energy metabolism.

Transcript
NM_001933.5
HGVS · transcript:coding
NM_001933.5:c.236C>T
GRCh38
chr14:74889311 C>T
GRCh37
chr14:75356014 C>T
VUS: PM2 (supporting) is the only met criterion and does not meet generic ACMG/AMP thresholds for a definitive classification.
Classification rationale
PM2 VUS
DLST c.236C>T missense · exon 5

PM2 supporting: gnomAD v4.1 allele frequency is 1.24e-06 with zero homozygotes.

PM2 → VUS
LYFE Sciences is an AI system, and it can make mistakes. Criteria may be applied incorrectly, sources may be misread, and a confident-looking classification can still be wrong. Double-check every criterion and its underlying evidence before relying on any call.
Gene diagram · NM_001933.5 · variants mapped to exon structure
DLST NM_001933.5
Fetching transcript structure from UCSC…
Applied criteria · 1 applied · 23 assessed
MetEvidence satisfies this criterion.
Not metEvaluated against available evidence; threshold not reached.
Not assessedApplies in principle, but no evidence was found to evaluate it.
N/ADoesn't apply to this variant type.
Applied · 1
Strength Supporting Moderate Strong Very strong
PM2 supporting Pathogenic
Met at supporting strength: gnomAD v4.1 allele frequency is 1.24e-06, below the <=0.0001 PM2 threshold, with zero homozygotes.
The variant is absent from gnomAD v2.1.gnomAD v4.1 reports 2 variant alleles among 1,611,108 total alleles, an all-comers allele frequency of 1.2413817074957111e-06, zero homozygotes, and a highest subpopulation frequency of 1.6953319036034279e-06 in European (non-Finnish) individuals.The supplied ClinGen SVI generic PM2 recommendation uses allele frequency <=0.0001 for supporting evidence (PMID:25741868).
Assessed · not applied · 7 not met · 16 not assessed
Pathogenic
PS1 Not assessed: no documented pathogenic same-amino-acid comparator was available for the DLST Ala79Val substitution.
PS2 Not assessed: no proband phenotype or parental genotype results establish de novo occurrence of NM_001933.5:c.236C>T.
PS3 Not assessed: no variant-specific functional assay, validated control comparison, or biological assay result is available for NM_001933.5:c.236C>T.
PS4 Not assessed: no affected-case series, control comparison, odds ratio, or statistically significant enrichment value is available for this exact variant.
PM1 Not assessed: no governing DLST domain table was available and no statistically significant hotspot was identified at residue 79.
PM3 Not assessed: no affected-proband observation, second pathogenic allele, or informative trans phase is documented for this DLST variant.
PM5 Not assessed: zero same-residue comparator variants were available, so no pathogenic alternate change at DLST residue 79 could be evaluated.
PM6 Not assessed: no affected individual or parental testing documents a presumed de novo occurrence for this DLST variant.
PP1 Not assessed: no pedigree, informative meioses, or affected-relative genotypes are available to demonstrate cosegregation.
PP2 Not assessed: no validated DLST-specific evidence establishes a predominant missense disease mechanism or low benign missense rate.
PP3 Not met: REVEL 0.519 is below the 0.644 supporting PP3 threshold for missense variants.
PP4 Not assessed: no individual phenotype or clinical diagnosis is provided to evaluate specificity for a DLST-related disorder.
PP5 Not met: the exact variant is absent from ClinVar, so no expert-panel Pathogenic or Likely pathogenic assertion exists to support PP5.
Benign
BA1 Not met: gnomAD v4.1 allele frequency is 1.24e-06, far below the >=0.05 BA1 threshold.
BS1 Not met: gnomAD v4.1 allele frequency is 1.24e-06, below the >=0.01 generic BS1 threshold.
BS2 Not met: gnomAD v4.1 reports zero homozygotes, which is absence of positive BS2 evidence rather than benign homozygote observation.
BS3 Not assessed: no variant-specific functional assay, validated control comparison, or preserved-function result is available for NM_001933.5:c.236C>T.
BS4 Not assessed: no affected-family genotypes or phenotype data demonstrate non-segregation of the DLST variant.
BP1 Not assessed: no validated DLST framework establishes that disease is restricted to truncating variants and excludes a missense mechanism.
BP2 Not assessed: no documented cis or trans relationship with a pathogenic variant, or affected individual with an alternate pathogenic explanation, is available.
BP4 Not met: REVEL 0.519 exceeds the 0.29 supporting BP4 threshold for missense variants.
BP5 Not assessed: no individual phenotype or documented alternate molecular basis is available to evaluate whether another cause explains the disorder.
BP6 Not met: the exact variant is absent from ClinVar, so no expert-panel Benign or Likely benign assertion exists to support BP6.
N/A · 4 PVS1 · PM4 · BP3 · BP7
Research & evidence
Population frequency
gnomAD v4.1 screenshot
gnomAD v4.1
gnomAD v2.1 screenshot
gnomAD v2.1
v4.1
This variant is present in gnomAD v4.1 (AF= 1.24138e-06; MAF= 0.00012%, 2/1611108 alleles, homozygotes = 0) and has highest observed frequency in the European (non-Finnish) population (AF= 1.69533e-06; MAF= 0.00017%, 2/1179710 alleles, homozygotes = 0); grpmax FAF= 2.8e-07.
v2.1
Absent from gnomAD v2.1.
🇨🇦 CA
Not available in gnomAD-Canada v1.0.
Allele frequency by ancestry
three datasets · side by side
gnomAD v4.1
0.00012% · 2 / 1,611,108
0 hom · FAF 2.8e-05%
European (non-Finnish)
2 / 1,179,710
0.00017%
+ 9 not observed (Remaining individuals, Admixed American, European (Finnish), Amish, East Asian, Middle Eastern, South Asian, Ashkenazi Jewish, African/African American)
gnomAD v2.1
Absent · 0 / ?
0 hom
Not observed in any ancestry group.
gnomAD Canada 🇨🇦
Absent · 0 / ?
0 hom
Not observed in any ancestry group.
ClinVar screenshot
ClinVar
This variant is absent from ClinVar.
SpliceAI screenshot
In silico
SpliceAI predicts no significant splice impact for this variant (max delta score = 0.08). REVEL score = 0.519. BayesDel score = 0.235208.
Functional No data
No calibrated functional assay or RNA evidence was identified for this variant.
OncoKB ↗
COSMIC screenshot
COSMIC
Cancer hotspots screenshot
Cancer hotspots
Somatic evidence Not in COSMIC / hotspots
COSMIC
This variant does not lie in a statistically significant hotspot. This variant has not previously been reported in somatic cancers (COSMIC).
Hotspots
This variant does not lie in a statistically significant hotspot.
Sources & reference links
8Sources
ClinVar
gnomAD v2.1
gnomAD v4.1
gnomAD-Canada
SpliceAI
OncoKB
COSMIC
Cancer hotspots