4pie | pdb_00004pie

Crystal structure of human adenovirus 2 protease a substrate based nitrile inhibitor

spinqualitylabelsall models 4pie, resolution 1.94Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4pie is a 2 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: 3FO, ACT, SO4, ZN Related: 4piq, 4pis Activity: Adenain, with EC number 3.4.22.39 Resources: FirstGlance, OCA, RCSB, PDBsum Function [PRO_ADE02] Cleaves viral precursor proteins (pTP, pIIIa, pVI, pVII, pVIII, and pX) inside newly assembled particles giving rise to mature virions. Protease complexed to its cofactor slides along the viral DNA to specifically locate and cleave the viral precursors. Mature virions have a weakened organization compared to the unmature virions, thereby facilitating subsequent uncoating. Without maturation, the particle lacks infectivity and is unable to uncoat. Late in adenovirus infection, in the cytoplasm, may participate in the cytoskeleton destruction. Cleaves host cells cytoskeletal keratins K7 and K18. [CAP6_ADE02] Pre-protein VI: During virus assembly, promotes hexon trimers nuclear import through nuclear pore complexes via an importin alpha/beta-dependent mechanism. By analogy to herpesviruses capsid assembly, might act as a scaffold protein to promote the formation of the icosahedral capsid. Endosome lysis protein: Structural component of the virion that provides increased stability to the particle shell through its interaction with the core-capsid bridging protein. Fibers shedding during virus entry into host cell allows the endosome lysis protein to be exposed as a membrane-lytic peptide. Exhibits pH-independent membrane fragmentation activity and probably mediates viral rapid escape from host endosome via organellar membrane lysis. It is not clear if it then remains partially associated with the capsid and involved in the intracellular microtubule-dependent transport of capsid to the nucleus, or if it is lost during endosomal penetration. Protease cofactor: Cofactor that activates the viral protease. Binds to viral protease in a 1:1 ratio. Publication Abstract from PubMed The cysteine protease adenain is the essential protease of adenovirus and, as such, represents a promising target for the treatment of ocular and other adenoviral infections. Through a concise two-pronged hit discovery approach we identified tetrapeptide nitrile 1 and pyrimidine nitrile 2 as complementary starting points for adenain inhibition. These hits enabled the first high-resolution X-ray cocrystal structures of adenain with inhibitors bound and revealed the binding mode of 1 and 2. The screening hits were optimized by a structure-guided medicinal chemistry strategy into low nanomolar drug-like inhibitors of adenain. Discovery and structure-based optimization of adenain inhibitors.,Mac Sweeney A, Grosche P, Ellis D, Combrink K, Erbel P, Hughes N, Sirockin F, Melkko S, Bernardi A, Ramage P, Jarousse N, Altmann E ACS Med Chem Lett. 2014 Jun 20;5(8):937-41. doi: 10.1021/ml500224t. eCollection, 2014 Aug 14. PMID:25147618 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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