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- W2324894449 abstract "In this article, interactions between Bacillus subtilis single-stranded DNA binding proteins (BsSSB) and single-stranded DNA (ssDNA) were systematically studied. The effect of different molar ratios between BsSSB and ssDNA on their binding modes was first investigated by electrophoretic mobility shift assays (EMSAs). It is found that a high molar ratio of BsSSB to ssDNA can produce BsSSB–ssDNA complexes formed in the mode of two proteins binding one 65-nt (nucleotide) ssDNA whereas a low molar ratio facilitates the formation of BsSSB–ssDNA complexes in the mode of one protein binding one 65-nt ssDNA. Furthermore, two binding modes are in dynamic equilibrium. The unbinding force of BsSSB–ssDNA complexes was measured quantitatively in solutions with different salt concentrations by using AFM-based single-molecule force spectroscopy (SMFS). Our results show that the unbinding force is about 10 pN higher at high salt concentration (0.5 M NaCl) than at low salt concentration (0.1 M NaCl) and the lifetime of BsSSB–ssDNA complexes at high salt concentration is twice as long as that at low salt concentration. These results indicate that more tightly packed BsSSB–ssDNA complexes can form at high salt (0.5 M NaCl) concentration. In addition, the results of EMSA show that ssDNA, which is bound to BsSSB, can dissociate from BsSSB in the presence of the cDNA strand, indicating the dynamic nature of BsSSB–ssDNA interactions." @default.
- W2324894449 created "2016-06-24" @default.
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- W2324894449 creator A5078199792 @default.
- W2324894449 creator A5085108258 @default.
- W2324894449 date "2011-11-22" @default.
- W2324894449 modified "2023-10-17" @default.
- W2324894449 title "EMSA and Single-Molecule Force Spectroscopy Study of Interactions between <i>Bacillus subtilis</i> Single-Stranded DNA-Binding Protein and Single-Stranded DNA" @default.
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- W2324894449 doi "https://doi.org/10.1021/la203752y" @default.
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