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Insights into Base Selectivity from the 1.8 Å Resolution Structure of an RB69 DNA Polymerase Ternary Complex†
[Image: see text] Bacteriophage RB69 DNA polymerase (RB69 pol) has served as a model for investigating how B family polymerases achieve a high level of fidelity during DNA replication. We report here the structure of an RB69 pol ternary complex at 1.8 Å resolution, extending the resolution from our...
Autores principales: | , , , , , |
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Formato: | Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2010
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3036992/ https://www.ncbi.nlm.nih.gov/pubmed/21158418 http://dx.doi.org/10.1021/bi101192f |
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author | Wang, Mina Xia, Shuangluo Blaha, Gregor Steitz, Thomas A. Konigsberg, William H. Wang, Jimin |
author_facet | Wang, Mina Xia, Shuangluo Blaha, Gregor Steitz, Thomas A. Konigsberg, William H. Wang, Jimin |
author_sort | Wang, Mina |
collection | PubMed |
description | [Image: see text] Bacteriophage RB69 DNA polymerase (RB69 pol) has served as a model for investigating how B family polymerases achieve a high level of fidelity during DNA replication. We report here the structure of an RB69 pol ternary complex at 1.8 Å resolution, extending the resolution from our previously reported structure at 2.6 Å [Franklin, M. C., et al. (2001) Cell 105, 657−667]. In the structure presented here, a network of five highly ordered, buried water molecules can be seen to interact with the N3 and O2 atoms in the minor groove of the DNA duplex. This structure reveals how the formation of the closed ternary complex eliminates two ordered water molecules, which are responsible for a kink in helix P in the apo structure. In addition, three pairs of polar−nonpolar interactions have been observed between (i) the Cα hydrogen of G568 and the N3 atom of the dG templating base, (ii) the O5′ and C5 atoms of the incoming dCTP, and (iii) the OH group of S565 and the aromatic face of the dG templating base. These interactions are optimized in the dehydrated environment that envelops Watson−Crick nascent base pairs and serve to enhance base selectivity in wild-type RB69 pol. |
format | Text |
id | pubmed-3036992 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2010 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-30369922012-02-01 Insights into Base Selectivity from the 1.8 Å Resolution Structure of an RB69 DNA Polymerase Ternary Complex† Wang, Mina Xia, Shuangluo Blaha, Gregor Steitz, Thomas A. Konigsberg, William H. Wang, Jimin Biochemistry [Image: see text] Bacteriophage RB69 DNA polymerase (RB69 pol) has served as a model for investigating how B family polymerases achieve a high level of fidelity during DNA replication. We report here the structure of an RB69 pol ternary complex at 1.8 Å resolution, extending the resolution from our previously reported structure at 2.6 Å [Franklin, M. C., et al. (2001) Cell 105, 657−667]. In the structure presented here, a network of five highly ordered, buried water molecules can be seen to interact with the N3 and O2 atoms in the minor groove of the DNA duplex. This structure reveals how the formation of the closed ternary complex eliminates two ordered water molecules, which are responsible for a kink in helix P in the apo structure. In addition, three pairs of polar−nonpolar interactions have been observed between (i) the Cα hydrogen of G568 and the N3 atom of the dG templating base, (ii) the O5′ and C5 atoms of the incoming dCTP, and (iii) the OH group of S565 and the aromatic face of the dG templating base. These interactions are optimized in the dehydrated environment that envelops Watson−Crick nascent base pairs and serve to enhance base selectivity in wild-type RB69 pol. American Chemical Society 2010-12-15 2011-02-01 /pmc/articles/PMC3036992/ /pubmed/21158418 http://dx.doi.org/10.1021/bi101192f Text en Copyright © 2010 American Chemical Society http://pubs.acs.org This is an open-access article distributed under the ACS AuthorChoice Terms & Conditions. Any use of this article, must conform to the terms of that license which are available at http://pubs.acs.org. |
spellingShingle | Wang, Mina Xia, Shuangluo Blaha, Gregor Steitz, Thomas A. Konigsberg, William H. Wang, Jimin Insights into Base Selectivity from the 1.8 Å Resolution Structure of an RB69 DNA Polymerase Ternary Complex† |
title | Insights into Base Selectivity from the 1.8 Å Resolution Structure of an RB69 DNA Polymerase Ternary Complex† |
title_full | Insights into Base Selectivity from the 1.8 Å Resolution Structure of an RB69 DNA Polymerase Ternary Complex† |
title_fullStr | Insights into Base Selectivity from the 1.8 Å Resolution Structure of an RB69 DNA Polymerase Ternary Complex† |
title_full_unstemmed | Insights into Base Selectivity from the 1.8 Å Resolution Structure of an RB69 DNA Polymerase Ternary Complex† |
title_short | Insights into Base Selectivity from the 1.8 Å Resolution Structure of an RB69 DNA Polymerase Ternary Complex† |
title_sort | insights into base selectivity from the 1.8 å resolution structure of an rb69 dna polymerase ternary complex† |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3036992/ https://www.ncbi.nlm.nih.gov/pubmed/21158418 http://dx.doi.org/10.1021/bi101192f |
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