Abstract

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. We have shown the uptake of gold using live plants of alfalfa and Chilopsis linearis which results in the formation of gold nanoparticles. In addition, we have also shown the formation of gold nanoparticles on inactivated tissues of alfalfa, oat, wheat, and hops. However, more recently we have been investigating the extraction of gold nanoparticles from both the living and inactivated biological materials. We have seen some success using CTAB a quaternary ammonium ion. The extraction of gold nanoparticles is plagued by questions of nanoparticle stability and XAS provides an excellent method to follow the stability of gold nanoparticles by comparison of the XANES and EXAFS results obtained from the extraction procedures that we will be using. In addition, we have been investigating methods to increase gold uptake by live plants using gold chelating agents. Yet, the effects of these chemicals on the formation of the gold nanoparticles have not been studied in depth. We have seen from preliminary results from XAS studies the chemistry of the gold within the live plants is dependent on the chemical chelating agent used. Gold introduced in the growth media in the presence of thiocyanate resulted in the production of gold nanoparticles within the live plant. But, the use of thiourea resulted in a mixture of compounds indicating the presence of both gold-sulfur containing compounds and gold nanoparticles, this needs to be investigated further to understand the compounds coordinating the gold within the plants. In addition, we are currently testing compounds and digestion protocols for the extraction of gold nanoparticles from the living plant tissues, which XAS will be an invaluable tool for these studies. XAS will provide us with important information on the stability of gold nanoparticles during the extraction process from both live and inactivated biological tiss

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
5P41RR001209-27
Application #
7370545
Study Section
Special Emphasis Panel (ZRG1-BPC-E (40))
Project Start
2006-03-01
Project End
2007-02-28
Budget Start
2006-03-01
Budget End
2007-02-28
Support Year
27
Fiscal Year
2006
Total Cost
$219
Indirect Cost

  Institution

Name
Stanford University
Department
Chemistry
Type
Schools of Arts and Sciences
DUNS #
009214214
City
Stanford
State
CA
Country
United States
Zip Code
94305

  Publications

Vickers, Chelsea; Liu, Feng; Abe, Kento et al. (2018) Endo-fucoidan hydrolases from glycoside hydrolase family 107 (GH107) display structural and mechanistic similarities to ?-l-fucosidases from GH29. J Biol Chem 293:18296-18308
Nguyen, Phong T; Lai, Jeffrey Y; Lee, Allen T et al. (2018) Noncanonical role for the binding protein in substrate uptake by the MetNI methionine ATP Binding Cassette (ABC) transporter. Proc Natl Acad Sci U S A 115:E10596-E10604
Aleman, Fernando; Tzarum, Netanel; Kong, Leopold et al. (2018) Immunogenetic and structural analysis of a class of HCV broadly neutralizing antibodies and their precursors. Proc Natl Acad Sci U S A 115:7569-7574
Herrera, Nadia; Maksaev, Grigory; Haswell, Elizabeth S et al. (2018) Elucidating a role for the cytoplasmic domain in the Mycobacterium tuberculosis mechanosensitive channel of large conductance. Sci Rep 8:14566
Lal, Neeraj K; Nagalakshmi, Ugrappa; Hurlburt, Nicholas K et al. (2018) The Receptor-like Cytoplasmic Kinase BIK1 Localizes to the Nucleus and Regulates Defense Hormone Expression during Plant Innate Immunity. Cell Host Microbe 23:485-497.e5
Pluvinage, Benjamin; Grondin, Julie M; Amundsen, Carolyn et al. (2018) Molecular basis of an agarose metabolic pathway acquired by a human intestinal symbiont. Nat Commun 9:1043
Beyerlein, Kenneth R; Jönsson, H Olof; Alonso-Mori, Roberto et al. (2018) Ultrafast nonthermal heating of water initiated by an X-ray Free-Electron Laser. Proc Natl Acad Sci U S A 115:5652-5657
Yoshizawa, Takuya; Ali, Rustam; Jiou, Jenny et al. (2018) Nuclear Import Receptor Inhibits Phase Separation of FUS through Binding to Multiple Sites. Cell 173:693-705.e22
Dods, Robert; Båth, Petra; Arnlund, David et al. (2017) From Macrocrystals to Microcrystals: A Strategy for Membrane Protein Serial Crystallography. Structure 25:1461-1468.e2
de Vries, Robert P; Tzarum, Netanel; Peng, Wenjie et al. (2017) A single mutation in Taiwanese H6N1 influenza hemagglutinin switches binding to human-type receptors. EMBO Mol Med 9:1314-1325

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