6k3h

Crystallographic Analysis of Nucleoside Diphosphate Kinase (NDK) from Aspergillus Flavus

spinqualitylabelsall models 6k3h, resolution 2.18Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6k3h is a 24 chain structure with sequence from Aspergillus flavus NRRL3357. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.179Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function B8NQF0_ASPFN Publication Abstract from PubMed The fundamental biological function of nucleoside diphosphate kinase (NDK) is to catalyze the reversible exchange of the gamma-phosphate between nucleoside triphosphate (NTP) and nucleoside diphosphate (NDP). This kinase also has functions that extend beyond its canonically defined enzymatic role as a phosphotransferase. However, the role of NDK in filamentous fungi, especially in Aspergillus flavus (A. flavus), is not yet known. Here we report that A. flavus has two NDK-encoding gene copies as assessed by qPCR. Using gene-knockout and complementation experiments, we found that AfNDK regulates spore and sclerotia development and is involved in plant virulence as assessed in corn and peanut seed-based assays. An antifungal test with the inhibitor azidothymidine suppressed AfNDK activity in vitro and prevented spore production and sclerotia formation in A. flavus, confirming AfNDK's regulatory functions. Crystallographic analysis of AfNDK, coupled with site-directed mutagenesis experiments, revealed three residues (R104, H117, and D120) as key sites that contribute to spore and sclerotia development. These results not only enrich our knowledge of the regulatory role of this important protein in A. flavus, but also provide insights into the prevention of A. flavus infection in plants and seeds, as well as into the structural features relevant for future antifungal drug development. Molecular and structural basis of nucleoside diphosphate kinase-mediated regulation of spore and sclerotia development in the fungus Aspergillus flavus.,Wang Y, Wang S, Nie X, Yang K, Xu P, Wang X, Liu M, Yang Y, Chen Z, Wang S J Biol Chem. 2019 Jun 26. pii: RA119.007505. doi: 10.1074/jbc.RA119.007505. PMID:31243100 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Nucleoside diphosphate kinase 3D structures

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