Journal
POLYMERS
Volume 12, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/polym12122983
Keywords
ssDNA aptamers; in-silico approach; binding affinity; mycotoxins; fumonisin B1; aflatoxin B1; ochratoxin A
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Funding
- MYCOKEY project Integrated and innovative key actions for mycotoxin management in the food and feed chain (H2020) [678781]
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Aptamers are single-stranded oligonucleotides selected by SELEX (Systematic Evolution of Ligands by EXponential Enrichment) able to discriminate target molecules with high affinity and specificity, even in the case of very closely related structures. Aptamers have been produced for several targets including small molecules like mycotoxins; however, the high affinity for their respective target molecules is a critical requirement. In the last decade, the screening through computational methods of aptamers for their affinity against specific targets has greatly increased and is becoming a commonly used procedure due to its convenience and low costs. This paper describes an in-silico approach for rapid screening of ten ssDNA aptamer sequences against fumonisin B1 (FB1, n = 3), aflatoxin B1 (AFB1, n = 2) and ochratoxin A (OTA, n = 5). Theoretical results were compared with those obtained by testing the same aptamers by fluorescent microscale thermophoresis and by magnetic beads assay for their binding affinity (K-D) revealing a good agreement.
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