Part:BBa_K3798004

ssDNA, a good aptamer for Ag+ ion 1

Silver is one of the most wasted precious metals that can be found in effluents, streams and even food. As our project is to develop a precious metal recycling platform, we chose Ag+ as the demonstration ion of this phase of the project. Aptamers are oligonucleotides that can bind targeted molecules with its secondary structures, in our project, Ag+ ion. BBa_K3798004 is a Ag+ aptamer obtained from a previous paper[1]. Sequence and Features

Assembly Compatibility:

• 10
  COMPATIBLE WITH RFC[10]
• 12
  COMPATIBLE WITH RFC[12]
• 21
  COMPATIBLE WITH RFC[21]
• 23
  COMPATIBLE WITH RFC[23]
• 25
  COMPATIBLE WITH RFC[25]
• 1000
  COMPATIBLE WITH RFC[1000]

Binding efficiency and stability

Fig.1 Remaining Ag+ ion concentration of the solution after treated by different types of aptamers.

Although Aptamer 3 has the highest binding ability (the remaining ion concentration of Aptamer 3 is 86ug/L lower than that of Aptamer 4), the performance of it is not as stable as that of Aptamer 4 (larger error bound) and cannot be used in large scale implementation. Therefore, further inspection of this aptamer did not proceed.

Reference

1. Shen, F., Mao, S., Mathivanan, J., Wu, Y., Chandrasekaran, A., & Liu, H. et al. (2020). Short DNA Oligonucleotide as a Ag+ Binding Detector. ACS Omega, 5(44), 28565-28570. doi: 10.1021/acsomega.0c03372