Rapid Diagnostic Assay for Intact Influenza Virus ... - ACS Publications

May 12, 2017 - that results in approximately 500 000 deaths globally each year. Commercially available rapid ... specific flu strains.4 During the 201...
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A Rapid Diagnostic Assay for Intact Influenza Virus Using a High Affinity Hemagglutinin Binding Protein Caitlin E. Anderson, Carly A. Holstein, Eva-Maria Strauch, Steven Bennett, Aaron Chevalier, Jorgen W. Nelson, Elain Fu, David Baker, and Paul Yager Anal. Chem., Just Accepted Manuscript • Publication Date (Web): 12 May 2017 Downloaded from http://pubs.acs.org on May 13, 2017

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Analytical Chemistry

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Page 5 of 14

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Analytical Chemistry

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Figure 1. Illustration of the influenza virus and the targeted sites for binder development. The virus at left shows the trimeric hemagglutinin (HA) protein (in blue) on the viral surface. The images at center and right show the two classes of conserved sites (in yellow) to which the synthetic binders were targeted. Influenza virus image from cdc.gov. 339x171mm (96 x 96 DPI)

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Figure 2. Illustration of the influenza surface protein HA (purple) bound to the computationally-designed head region binder (orange). Detailed information about the binder proteins is provided in Supplemental Table 1. 193x101mm (96 x 96 DPI)

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Analytical Chemistry

Figure 3. Illustrations of the novel influenza HA “assay stacks” demonstrated herein. (A) Assay stacks for recombinant HA detection, including all antibody detection (top) and head region binder capture with antibody detection (bottom) (B) Assay stacks for intact influenza virus, including all antibody detection (left), the mixed assay stack with head region binder capture and antibody detection (middle), and head region binder capture and detection (right). (C) Figure legend describing each molecular component. Note that the molecular components are not to scale. 464x236mm (96 x 96 DPI)

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Figure 4. Recombinant Flu HA assays with either antibody or novel head region binder as capture agent, with antibody gold readout. Representative test lines and the full assay response curves are provided. Each condition was tested with n=4 replicates. (A) Antibody capture assay run with recombinant HA. (B) Head region binder capture assay run with recombinant HA. 281x122mm (96 x 96 DPI)

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Analytical Chemistry

Figure 5. Flu HA assay with novel head region binder as both capture and detection of influenza virus. (A) Antibody capture and detection of intact influenza virus. (B) Head region binder capture and antibody detection of intact influenza virus. (C) Head region binder capture and detection of intact influenza virus. As the antibodies are replaced with the head region binders, a reduction in the lower limit of detection can be seen, with the lowest LOD shown in panel C. Representative test lines and the full assay response curves are provided. Each condition was tested with n=3 replicates. 154x346mm (96 x 96 DPI)

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Table of contents graphic 513x278mm (96 x 96 DPI)

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