Characterization Of An Atypical, Thermostable, Organic Solvent- And Acid-Tolerant 2′-Deoxyribosyltransferase From Chroococcidiopsis Thermalis

In our search for thermophilic and acid-tolerant nucleoside 2′-deoxyribosyltransferases (NDTs), we found a good candidate in an enzyme encoded by Chroococcidiopsis thermalis PCC 7203 (CtNDT). Biophysical and biochemical characterization revealed CtNDT as a homotetramer endowed with good activity and stability at both high temperatures (50–100 °C) and a wide range of pH values (from 3 to 7). CtNDT recognizes purine bases and their corresponding 2′-deoxynucleosides but is also proficient using cytosine and 2′-deoxycytidine as substrates. These unusual features preclude the strict classification of CtNDT as either a type I or a type II NDT and further suggest that this simple subdivision may need to be updated in the future. Our findings also hint at a possible link between oligomeric state and NDT’s substrate specificity. Interestingly from a practical perspective, CtNDT displays high activity (80–100%) in the presence of several water-miscible co-solvents in a proportion of up to 20% and was successfully employed in the enzymatic production of several therapeutic nucleosides such as didanosine, vidarabine, and cytarabine.

• Autores: Del Arco, Jon; Sánchez Murcia, Pedro Alejandro; Mancheño José Miguel, José Miguel; Gago, Federico; Fernandez Lucas, Jesus
• Tipo de recurso: Article of journal
• Fecha de publicación: 2018
• Institución: Corporación Universidad de la Costa
• Repositorio: REDICUC - Repositorio CUC
• Idioma: eng
• OAI Identifier: oai:repositorio.cuc.edu.co:11323/1093
• Acceso en línea: https://hdl.handle.net/11323/1093; https://repositorio.cuc.edu.co/
• Palabra clave: Enzymatic Synthesis; Extremophiles; Homology Modeling; Nucleoside 2′-Deoxyribosyltransferase; Nucleoside Analogues
• Rights: openAccess
• License: Atribución – No comercial – Compartir igual