Mechanism of action of Acyclov ir is

(D) Inhibitor of HSV polymerase # Mechanism of action:> Acyclovir differs from previous nucleoside analogues in containing only a partial nucleoside structure: the sugar ring is replaced with an open-chain structure. It is selectively converted into acyclo-guanosine monophosphate (acyclo-GMP) by viral thymidine kinase, which is far more effective (3000 times) in phosphorylation than cellular thymidine kinase.ANTIVIRAL AGENTS ACTIVE AGAINST HERPESVIRUSESAgentDescription* AcyclovirInhibits HSV polymerase* FamciclovirProdrug of penciclovir (a guanosine analogue)* ValacyclovirProdrug of acyclovir; better absorption* GanciclovirMore potent polymerase inhibitor; more toxic than acyclovir* ValganciclovirProdrug of ganciclovir; better absorption* CidofovirNucleotide analogue of cytosine* FoscarnetPhosphonoformic acid; inhibits viral DNA polymerase