Structures of the Catalytic Domain of Bacterial Primase DnaG in Complexes with DNA Provide Insight into Key Priming Events
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. Furthermore 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.
- Authors:
-
- Univ. of Kentucky, Lexington, KY (United States)
- Univ. of California, San Diego, La Jolla, CA (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- SER-CAT
- OSTI Identifier:
- 1438848
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Biochemistry
- Additional Journal Information:
- Journal Volume: 57; Journal Issue: 14; Journal ID: ISSN 0006-2960
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- ENGLISH
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES; anions; peptides and proteins; genetics; crystal structure; ions; DNA replication; replisome; DNA binding; tuberculosis
Citation Formats
Hou, Caixia, Biswas, Tapan, and Tsodikov, Oleg V. Structures of the Catalytic Domain of Bacterial Primase DnaG in Complexes with DNA Provide Insight into Key Priming Events. United States: N. p., 2018.
Web. doi:10.1021/acs.biochem.8b00036.
Hou, Caixia, Biswas, Tapan, & Tsodikov, Oleg V. Structures of the Catalytic Domain of Bacterial Primase DnaG in Complexes with DNA Provide Insight into Key Priming Events. United States. https://doi.org/10.1021/acs.biochem.8b00036
Hou, Caixia, Biswas, Tapan, and Tsodikov, Oleg V. Tue .
"Structures of the Catalytic Domain of Bacterial Primase DnaG in Complexes with DNA Provide Insight into Key Priming Events". United States. https://doi.org/10.1021/acs.biochem.8b00036. https://www.osti.gov/servlets/purl/1438848.
@article{osti_1438848,
title = {Structures of the Catalytic Domain of Bacterial Primase DnaG in Complexes with DNA Provide Insight into Key Priming Events},
author = {Hou, Caixia and Biswas, Tapan and Tsodikov, Oleg V.},
abstractNote = {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. Furthermore 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.},
doi = {10.1021/acs.biochem.8b00036},
journal = {Biochemistry},
number = 14,
volume = 57,
place = {United States},
year = {Tue Mar 20 00:00:00 EDT 2018},
month = {Tue Mar 20 00:00:00 EDT 2018}
}
Web of Science
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Works referencing / citing this record:
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