Monday, 31 October 2005
93ah

Mapping Msp1-19 Binding Regions in Band 3 Peptide

Heather L. Mentzer, Chemical Engineering, Research Experince for Undergraduates at University of Illinois, Chicago, 1400 Greene Street, USC P.O. Box 81688, Columbia, SC 29225

The overall purpose of this research was to understand the mechanisms of the plasmodium falciparum invasion of erythrocytes with band 3 as a host receptor in the red blood cells, for merozoite surface protein 1 (MSP1-19) in the malaria parasite. From this knowledge, new vaccines can be created. The objectives are to test the binding strengths of two segments 5ABC and 6A from band 3 peptide with MSP1-19 found in a malaria parasite. The secondary objectives are to test the binding strengths of two truncated forms of the segment 5ABC, 5 and 6 as well as test two chimeric proteins 5ABC6A and 6A5ABC. The experiments will use GST-5ABC, GST-5ABC6A and GST-6A5ABC and Trx-MSP1-19, Trx-MSP1-19A, Trx-MSP1-19B, where GST and Trx are moiety fusion proteins. The results of the experiments showed signs of strong binding with GST-5ABC and GST-6A with Trx-MSP1-19, Trx-MSP1-19A, and Trx-MSP1-19B. Weak binding was found for GST-5 and GST-6 with Trx-19. Stronger binding occurred in the experiments of GST-5 and GST-6 with Trx-19A. The proteins, GST-5ABC6A and GST-6A5ABC with the Trx-19 showed no signs of binding occurring when GST-5ABC6A or GST-6A5ABC were immobilized on the chip as ligands. Stronger binding appeared when Trx-MSP1-19A was immobilized on the sensor chip and the experiments were repeated. The two segments 5ABC and 6A seemed to bind to the malaria parasite, meaning that the MSP1-19 had a role in the invasion of the red blood cells.


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