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https://hdl.handle.net/2440/99753
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Type: | Journal article |
Title: | Heterogeneous nucleation is required for crystallization of the ZnuA domain of pneumococcal AdcA |
Author: | Luo, Z. Morey, J. McDevitt, C. Kobe, B. |
Citation: | Acta Crystallographica Section F: Structural Biology Communications, 2015; 71(Pt 12):1459-1464 |
Publisher: | International Union of Crystallography |
Issue Date: | 2015 |
ISSN: | 2053-230X 2053-230X |
Statement of Responsibility: | Z. Luo, J. R. Morey, C. A. McDevitt and B. Kobe |
Abstract: | Zn²⁺ is an essential nutrient for all known forms of life. In the major human pathogen Streptococcus pneumoniae, the acquisition of Zn²⁺ is facilitated by two Zn²⁺-specific solute-binding proteins: AdcA and AdcAII. To date, there has been a paucity of structural information on AdcA, which has hindered a deeper understanding of the mechanism underlying pneumococcal Zn²⁺ acquisition. Native AdcA consists of two domains: an N-terminal ZnuA domain and a C-terminal ZinT domain. In this study, the ZnuA domain of AdcA was crystallized. The initial crystals of the ZnuA-domain protein were obtained using dried seaweed as a heterogeneous nucleating agent. No crystals were obtained in the absence of the heterogeneous nucleating agent. These initial crystals were subsequently used as seeds to produce diffraction-quality crystals. The crystals diffracted to 2.03 Å resolution and had the symmetry of space group P1. This study demonstrates the utility of heterogeneous nucleation. The solution of the crystal structures will lead to further understanding of Zn²⁺ acquisition by S. pneumoniae. |
Keywords: | AdcA Streptococcus pneumoniae Zn2+ ZnuA heterogeneous nucleation seaweed solute-binding protein |
Rights: | © International Union of Crystallography |
DOI: | 10.1107/S2053230X15021330 |
Grant ID: | http://purl.org/au-research/grants/nhmrc/565526 http://purl.org/au-research/grants/nhmrc/1071659 http://purl.org/au-research/grants/nhmrc/1022240 http://purl.org/au-research/grants/nhmrc/1080784 http://purl.org/au-research/grants/arc/DP120103957 http://purl.org/au-research/grants/arc/DP150101856 |
Published version: | http://dx.doi.org/10.1107/s2053230x15021330 |
Appears in Collections: | Aurora harvest 7 Molecular and Biomedical Science publications |
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