LIG3

Chr 17AR

DNA ligase 3

Also known as: LIG2, LIG3alpha, MTDPS20

This gene is a member of the DNA ligase family. Each member of this family encodes a protein that catalyzes the joining of DNA ends but they each have a distinct role in DNA metabolism. The protein encoded by this gene is involved in excision repair and is located in both the mitochondria and nucleus, with translation initiation from the upstream start codon allowing for transport to the mitochondria and translation initiation from a downstream start codon allowing for transport to the nucleus. Additionally, alternate transcriptional splice variants, encoding different isoforms, have been characterized. [provided by RefSeq, Jul 2008]

OMIMResearchGenerating clinical summary…

Primary Disease Associations & Inheritance

Mitochondrial DNA depletion syndrome 20 (MNGIE type)MIM #619780
AR

Clinical highlights

Gene-disease validity (ClinGen)
mitochondrial disease · ARDefinitivesufficient evidence for diagnostic panels
0
Active trials
33
Pubs (1 yr)
P/LP submissions
P/LP missense
0.68
LOEUF
DN
Mechanism· predicted

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

Tolerant — LoF & missense variants common in population
LoF Constraint?
0.68LOEUF
pLI 0.000
Z-score 3.39
OE 0.49 (0.350.68)
Tolerant

Typical tolerance to LoF variation

Missense Constraint?
1.63Z-score
OE missense 0.81 (0.750.88)
478 obs / 589.1 exp
Tolerant

Mild missense constraint

Observed / Expected Ratios?
LoF OE?0.49 (0.350.68)
00.351.4
Missense OE?0.81 (0.750.88)
00.61.4
Synonymous OE?0.96
01.21.6
LoF obs/exp: 25 / 51.2Missense obs/exp: 478 / 589.1Syn Z: 0.43

ClinVar Variant Classifications

0 submitted variants in ClinVar

Protein Context — Lollipop Plot

LIG3 · protein map & ClinVar variants

Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.

Clinical Trials

Active and recruiting trials from ClinicalTrials.gov

No active trials found for this gene.

Search ClinicalTrials.gov →