In the second grant we demonstrated that novel low molecular weight (MW) displacers can be successfully employed for high resolution/high-throughput protein purifications in ion exchange systems. We demonstrated that low molecular weight displacers can also be used for oligonucleotide purification and that the stationary phase has a significant effect on the efficacy of various low molecular weight displacers. Preliminary results indicate that high-throughput screening can be successfully employed to evaluate a wide variety of displacer chemistries. Further results from our laboratory indicate that this data can be employed in concert with novel quantitative structure efficacy relationship models to both predict and interpret displacer efficacy. Finally, preliminary results in our laboratory indicate that chemically selective displacers can be identified which can dramatically increase the selectivity of ion exchange systems. In the next phase of this project we will incorporate these new lines of research into our ongoing investigation into the rational design of displacers for the purification of biomolecules. We will incorporate the tools of high-throughput screening and synthesis, and quantitative structure activity relationship models into the research and we will address several critical issues related to the design of both high affinity and chemically selective low MW displacers for proteins and oligonucleotides in ion exchange systems. The next phase of the project will include high throughput screening, quantitative structure activity relationship models, displacer synthesis, chemoenzymatic synthesis of displacer libraries, the development of high affinity displacers for cation and anion exchange systems, development of selective displacers, and the application of these displacers for purification of biomolecules from complex mixtures. The synthetic work will include structural variants of low MW displacers identified in the second grant as well as variants of other promising candidates recently identified in our laboratory. The displacers developed in this research will be employed in a detailed investigation of the interplay between displacer chemistry and its ability to act as a high affinity or selective displacers for various classes of separation problems. This research will evaluate several hypotheses related to displacer design. The low MW displacers developed in this research will be employed for the purification of proteins and oligonucleotides from complex biological mixtures. Finally, these high affinity displacers will be employed to develop a generic displacement technique for purification of a range of proteins with possible applications to proteomics. The proposed research will provide significant insight into the design of efficient low MW displacers for protein and oligonucleotide purification and will enable more efficient purification of a wide range of biopharmaceuticals. Furthermore, this work will facilitate the use of this high resolution/high throughput technique by medical researchers at the bench scale for the rapid purification of novel biomolecules from dilute complex mixtures. ? ? ?

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
5R01GM047372-09
Application #
6894594
Study Section
Special Emphasis Panel (ZRG1-BECM (01))
Program Officer
Edmonds, Charles G
Project Start
1995-09-01
Project End
2007-04-30
Budget Start
2005-05-01
Budget End
2006-04-30
Support Year
9
Fiscal Year
2005
Total Cost
$516,079
Indirect Cost
Name
Rensselaer Polytechnic Institute
Department
Engineering (All Types)
Type
Schools of Engineering
DUNS #
002430742
City
Troy
State
NY
Country
United States
Zip Code
12180
Levy, Miriam H; Plawsky, Joel; Cramer, Steven M (2013) Photopolymerized sol-gel monoliths for separations of glycosylated proteins and peptides in microfluidic chips. J Sep Sci 36:2358-65
Evans, Steven T; Holstein, Melissa; Cramer, Steven M (2011) Detection of trace proteins in multicomponent mixtures using displacement chromatography. Anal Chem 83:4184-92
Evans, Steven T; Morrison, Christopher J; Freed, Alexander et al. (2010) The effect of feed composition on the behavior of chemically selective displacement systems. J Chromatogr A 1217:1249-54
Morrison, Christopher J; Godawat, Rahul; McCallum, Scott A et al. (2009) Mechanistic studies of displacer-protein binding in chemically selective displacement systems using NMR and MD simulations. Biotechnol Bioeng 102:1428-37
Evans, Steven T; Freed, Alexander; Cramer, Steven M (2009) Displacer concentration effects in displacement chromatography. Implications for trace solute detection. J Chromatogr A 1216:79-85
Morrison, Christopher J; Cramer, Steven M (2009) Characterization and design of chemically selective cationic displacers using a robotic high-throughput screen. Biotechnol Prog 25:825-33
Morrison, Christopher J; Park, Sun Kyu; Simocko, Chester et al. (2008) Synthesis and characterization of fluorescent displacers for online monitoring of displacement chromatography. J Am Chem Soc 130:17029-37
Liu, Jia; Hilton, Zachary A; Cramer, Steven M (2008) Chemically selective displacers for high-resolution protein separations in ion-exchange systems: effect of displacer-protein interactions. Anal Chem 80:3357-64
Rege, Kaushal; Viswanathan, Gunaranjan; Zhu, Guangyu et al. (2006) In vitro transcription and protein translation from carbon nanotube-DNA assemblies. Small 2:718-22
Rege, Kaushal; Ladiwala, Asif; Hu, Shanghui et al. (2005) Investigation of DNA-binding properties of an aminoglycoside-polyamine library using quantitative structure-activity relationship (QSAR) models. J Chem Inf Model 45:1854-63

Showing the most recent 10 out of 25 publications