Crystal Structure of 3WJ Core Revealing Divalent Ion-promoted Thermostability and Assembly of the Ph

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  Bacteriophage phi29 DNA packaging motor, one of the strongest biological motors constructed to date, is geared by a packaging RNA (pRNA) ring.The special properties of phi29 pRNA have led to the development of this RNA as a novel vehicle for applications in nanotcchnology and medicine.Recently, it has been found that the core structure of phi29 pRNA, a 54-m three-way junction (3WJ), exhibits extreme thermodynamic stability.
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