3igo

Crystal structure of Cryptosporidium parvum CDPK1, cgd3_920

spinqualitylabelsall models 3igo, resolution 2.25Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3igo is a 1 chain structure with sequence from Cryptosporidium parvum Iowa II. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.25Å Ligands: ANP, CA, GOL, PO4, SRT Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A3FQ16_CRYPI Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Calcium-dependent protein kinases (CDPKs) have pivotal roles in the calcium-signaling pathway in plants, ciliates and apicomplexan parasites and comprise a calmodulin-dependent kinase (CaMK)-like kinase domain regulated by a calcium-binding domain in the C terminus. To understand this intramolecular mechanism of activation, we solved the structures of the autoinhibited (apo) and activated (calcium-bound) conformations of CDPKs from the apicomplexan parasites Toxoplasma gondii and Cryptosporidium parvum. In the apo form, the C-terminal CDPK activation domain (CAD) resembles a calmodulin protein with an unexpected long helix in the N terminus that inhibits the kinase domain in the same manner as CaMKII. Calcium binding triggers the reorganization of the CAD into a highly intricate fold, leading to its relocation around the base of the kinase domain to a site remote from the substrate binding site. This large conformational change constitutes a distinct mechanism in calcium signal-transduction pathways. Structures of apicomplexan calcium-dependent protein kinases reveal mechanism of activation by calcium.,Wernimont AK, Artz JD, Finerty P Jr, Lin YH, Amani M, Allali-Hassani A, Senisterra G, Vedadi M, Tempel W, Mackenzie F, Chau I, Lourido S, Sibley LD, Hui R Nat Struct Mol Biol. 2010 May;17(5):596-601. Epub 2010 May 2. PMID:20436473 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Calcium-dependent protein kinase

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