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5W34

Crystal structure of the RNA polymerase domain (RPD) of Mycobacterium tuberculosis primase DnaG in complex with double-stranded DNA GACCGGAAGTGG

Summary for 5W34
Entry DOI10.2210/pdb5w34/pdb
Related5w33 5w35 5w36
DescriptorDNA primase, DNA oligomer 5'-CCACTTCCGGTC, DNA oligomer 5'-GACCGGAAGTGG (3 entities in total)
Functional Keywordsdna replication, replisome, toprim fold, dna binding, transferase
Biological sourceMycobacterium tuberculosis (strain ATCC 25618 / H37Rv)
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Total number of polymer chains4
Total formula weight78227.60
Authors
Hou, C.,Tsodikov, O.V. (deposition date: 2017-06-07, release date: 2018-03-28, Last modification date: 2023-10-04)
Primary citationHou, C.,Biswas, T.,Tsodikov, O.V.
Structures of the Catalytic Domain of Bacterial Primase DnaG in Complexes with DNA Provide Insight into Key Priming Events.
Biochemistry, 57:2084-2093, 2018
Cited by
PubMed Abstract: Bacterial primase DnaG is an essential nucleic acid polymerase that generates primers for replication of chromosomal DNA. The mechanism of DnaG remains unclear due to the paucity of structural information on DnaG in complexes with other replisome components. Here we report the first crystal structures of noncovalent DnaG-DNA complexes, obtained with the RNA polymerase domain of Mycobacterium tuberculosis DnaG and various DNA ligands. One structure, obtained with ds DNA, reveals interactions with DnaG as it slides on ds DNA and suggests how DnaG binds template for primer synthesis. In another structure, DNA in the active site of DnaG mimics the primer, providing insight into mechanisms for the nucleotide transfer and DNA translocation. In conjunction with the recent cryo-EM structure of the bacteriophage T7 replisome, this study yields a model for primer elongation and hand-off to DNA polymerase.
PubMed: 29558114
DOI: 10.1021/acs.biochem.8b00036
PDB entries with the same primary citation
Experimental method
X-RAY DIFFRACTION (2.95 Å)
Structure validation

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