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- W3000274311 abstract "Abstract We propose an integrated structural approach to search potential aptamer molecules for targeting cancer receptor proteins. We used the outer cellular domain of the B‐lymphocyte antigen, CD19, as the target for this study. First, using available protein‐aptamer structures deposited in the protein data bank as resources, structural annotation was performed to seek the most probable binding aptamer and its potential initial configuration to the CD19 structure. Using this initial structure, molecular dynamics (MD) simulations were performed for adjustment of the aptamer‐binding. During this process, we observed an “aptamer walking” mechanism of the binding of the single‐stranded RNA‐aptamer to CD19: the aptamer molecule gradually adjusts its configurations and shifts toward favorable binding positions. However, the target molecule CD19 maintained a relatively stable conformation during this process. The interface area between the RNA‐aptamer and CD19 increased from less than 8 nm 2 to over 12 nm 2 during a 2‐μs MD simulation. Using a stable binding pose as the starting structure, we manually mutated the RNA‐aptamer to a DNA‐aptamer and found that the interface area was further increased to over 16 nm 2 , indicating a stronger affinity compared to the RNA‐aptamer. The RNA‐ and DNA‐aptamers and their stable binding‐poses to the CD19 molecule may be used as templates in designing potential aptamer molecules that target the B‐cell marker molecule CD19 with enhanced specificity and stability." @default.
- W3000274311 created "2020-01-23" @default.
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- W3000274311 date "2020-01-11" @default.
- W3000274311 modified "2023-10-16" @default.
- W3000274311 title "Atomistic probing of aptameric binding of CD19 outer membrane domain reveals an “aptamer walking” mechanism" @default.
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- W3000274311 doi "https://doi.org/10.1002/btpr.2957" @default.
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