- EMDB-42150: Human Mitochondrial DNA Polymerase Gamma Binary Complex -
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Basic information
Entry
Database: EMDB / ID: EMD-42150
Title
Human Mitochondrial DNA Polymerase Gamma Binary Complex
Map data
LocSpiral Processed Map
Sample
Complex: Human Mitochondrial DNA Polymerase Gamma Binary Complex
Complex: DNA polymerase subunit gamma-1,DNA polymerase subunit gamma-2
Protein or peptide: DNA polymerase subunit gamma-1
Protein or peptide: DNA polymerase subunit gamma-2, mitochondrial
Complex: DNA
DNA: DNA (5'-D(P*AP*AP*AP*AP*CP*GP*AP*CP*GP*GP*CP*CP*AP*GP*TP*GP*CP*CP*AP*TP*AP*C)-3')
DNA: DNA (5'-D(P*AP*GP*GP*TP*AP*TP*GP*GP*CP*AP*CP*TP*GP*GP*CP*CP*GP*TP*CP*GP*TP*TP*TP*T)-3')
Keywords
Mitochondrial / DNA Polymerase / TRANSFERASE / TRANSFERASE-DNA complex
Function / homology
Function and homology information
gamma DNA polymerase complex / mitochondrial DNA replication / positive regulation of DNA-directed DNA polymerase activity / single-stranded DNA 3'-5' DNA exonuclease activity / Hydrolases; Acting on ester bonds; Exodeoxyribonucleases producing 5'-phosphomonoesters / DNA metabolic process / DNA replication proofreading / DNA polymerase processivity factor activity / mitochondrial nucleoid / Lyases; Carbon-oxygen lyases; Other carbon-oxygen lyases ...gamma DNA polymerase complex / mitochondrial DNA replication / positive regulation of DNA-directed DNA polymerase activity / single-stranded DNA 3'-5' DNA exonuclease activity / Hydrolases; Acting on ester bonds; Exodeoxyribonucleases producing 5'-phosphomonoesters / DNA metabolic process / DNA replication proofreading / DNA polymerase processivity factor activity / mitochondrial nucleoid / Lyases; Carbon-oxygen lyases; Other carbon-oxygen lyases / 5'-deoxyribose-5-phosphate lyase activity / DNA polymerase binding / 3'-5' exonuclease activity / base-excision repair, gap-filling / Transcriptional activation of mitochondrial biogenesis / base-excision repair / DNA-templated DNA replication / double-stranded DNA binding / protease binding / in utero embryonic development / DNA-directed DNA polymerase / DNA-directed DNA polymerase activity / mitochondrial matrix / intracellular membrane-bounded organelle / chromatin binding / protein-containing complex / mitochondrion / DNA binding / identical protein binding / cytoplasm Similarity search - Function
DNA-directed DNA-polymerase, family A, mitochondria / DNA mitochondrial polymerase, exonuclease domain / : / DNA mitochondrial polymerase exonuclease domain / POLG2, C-terminal / Glycyl-tRNA synthetase/DNA polymerase subunit gamma-2 / Anticodon-binding / Anticodon binding domain / DNA-directed DNA polymerase, family A, conserved site / DNA polymerase family A signature. ...DNA-directed DNA-polymerase, family A, mitochondria / DNA mitochondrial polymerase, exonuclease domain / : / DNA mitochondrial polymerase exonuclease domain / POLG2, C-terminal / Glycyl-tRNA synthetase/DNA polymerase subunit gamma-2 / Anticodon-binding / Anticodon binding domain / DNA-directed DNA polymerase, family A, conserved site / DNA polymerase family A signature. / Anticodon-binding domain superfamily / DNA-directed DNA polymerase, family A, palm domain / DNA polymerase A domain / Class II Aminoacyl-tRNA synthetase/Biotinyl protein ligase (BPL) and lipoyl protein ligase (LPL) / Ribonuclease H-like superfamily / DNA/RNA polymerase superfamily Similarity search - Domain/homology
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
R01AI134611
United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM145925
United States
Citation
Journal: Sci Adv / Year: 2024 Title: An interaction network in the polymerase active site is a prerequisite for Watson-Crick base pairing in Pol γ. Authors: Joon Park / Geoffrey K Herrmann / Arkanil Roy / Christie K Shumate / G Andrés Cisneros / Y Whitney Yin / Abstract: The replication accuracy of DNA polymerase gamma (Pol γ) is essential for mitochondrial genome integrity. Mutation of human Pol γ arginine-853 has been linked to neurological diseases. Although not ...The replication accuracy of DNA polymerase gamma (Pol γ) is essential for mitochondrial genome integrity. Mutation of human Pol γ arginine-853 has been linked to neurological diseases. Although not a catalytic residue, Pol γ arginine-853 mutants are void of polymerase activity. To identify the structural basis for the disease, we determined a crystal structure of the Pol γ mutant ternary complex with correct incoming nucleotide 2'-deoxycytidine 5'-triphosphate (dCTP). Opposite to the wild type that undergoes open-to-closed conformational changes when bound to a correct nucleotide that is essential for forming a catalytically competent active site, the mutant complex failed to undergo the conformational change, and the dCTP did not base pair with its Watson-Crick complementary templating residue. Our studies revealed that arginine-853 coordinates an interaction network that aligns the 3'-end of primer and dCTP with the catalytic residues. Disruption of the network precludes the formation of Watson-Crick base pairing and closing of the active site, resulting in an inactive polymerase.
Macromolecule #4: DNA (5'-D(P*AP*GP*GP*TP*AP*TP*GP*GP*CP*AP*CP*TP*GP*GP*CP*CP*GP*TP...
Macromolecule
Name: DNA (5'-D(P*AP*GP*GP*TP*AP*TP*GP*GP*CP*AP*CP*TP*GP*GP*CP*CP*GP*TP*CP*GP*TP*TP*TP*T)-3') type: dna / ID: 4 / Number of copies: 1 / Classification: DNA
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