3zbr

Catalytic domain of mouse 2',3'-cyclic nucleotide 3'- phosphodiesterase, with mutation H230S, crystallized with NADP

spinqualitylabelsall models 3zbr, resolution 2.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3zbr is a 2 chain structure with sequence from Lk3 transgenic mice. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: NAP Related: 2xmi, 2y1p, 2y3x, 2ydb, 2ydc, 2ydd, 2yoz, 2yp0, 2ypc, 2ype, 2yph, 2yq9 Activity: 2',3'-cyclic-nucleotide 3'-phosphodiesterase, with EC number 3.1.4.37 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [CN37_MOUSE] May participate in RNA metabolism in the myelinating cell, CNP is the third most abundant protein in central nervous system myelin. Publication Abstract from PubMed 2H phosphoesterases catalyze reactions on nucleotide substrates and contain two conserved histidine residues in the active site. Very limited information is currently available on the details of the active site and substrate/product binding during the catalytic cycle of these enzymes. We performed a comprehensive X-ray crystallographic study of mouse 2',3'-cyclic nucleotide 3'-phosphodiesterase (CNPase), a membrane-associated enzyme present at high levels in the tetrapod myelin sheath. We determined crystal structures of the CNPase phosphodiesterase domain complexed with substrate, product, and phosphorothioate analogues. The data provide detailed information on the CNPase reaction mechanism, including substrate binding mode and coordination of the nucleophilic water molecule. Linked to the reaction, an open/close motion of the beta5-alpha7 loop is observed. The role of the N terminus of helix alpha7 - unique for CNPase in the 2H family - during the reaction indicates that 2H phosphoesterases differ in their respective reaction mechanisms, despite the conserved catalytic residues. Furthermore, based on small-angle X-ray scattering, we present a model for the full-length enzyme, indicating the two domains of CNPase form an elongated molecule. Finally, based on our structural data and a comprehensive bioinformatics study, we discuss the conservation of CNPase in various organisms. Crystallographic analysis of the reaction cycle of 2',3'-cyclic nucleotide 3'-phosphodiesterase, a unique member of the 2H phosphoesterase family.,Myllykoski M, Raasakka A, Lehtimaki M, Han H, Kursula I, Kursula P J Mol Biol. 2013 Jul 2. pii: S0022-2836(13)00391-4. doi:, 10.1016/j.jmb.2013.06.012. PMID:23831225 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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