Cas14a1-mediated nucleic acid detectifon platform for pathogens

Abstract

Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)-associated nuclease (Cas) based biosensing system provides a novel genomic diagnostic tool for pathogenic detection. However, most of the discovered Cas effectors have poor single strand DNA (ssDNA) target recognition capability with the constraint of protospacer adjacent motif (PAM) sites, which are not suitable for universal pathogenic diagnosis. Herein, we developed a highly sensitive and specific fluorescence tool for bacterial detection by utilizing the unique collateral cleavage activity of a Cas14a1-mediated nucleic acid detection platform (CMP). We combine CMP with molecular amplification to build a CRISPR-Cas based bioanalysis technique, offering fast nucleic acid detection with high sensitivity and specificity. This technique can identify different species of pathogens in milk samples with excellent accuracy. The CMP technique is a promising platform for pathogenic genomic diagnostic in biomedicine and food safety field.