5bu1

Structure of the truncated C-terminal domain of lpg1496 from Legionella pneumophila

spinqualitylabelsall models 5bu1, resolution 1.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5bu1 is a 1 chain structure with sequence from Legionella pneumophila subsp. pneumophila ATCC 43290. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.6Å Ligands: MLI Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Pathogenic gram-negative bacteria use specialized secretion systems that translocate bacterial proteins, termed effectors, directly into host cells where they interact with host proteins and biochemical processes for the benefit of the pathogen. Lpg1496 is a previously uncharacterized effector of Legionella pneumophila, the causative agent of Legionnaire's disease. Here, we crystallized three nucleotide-binding domains from lpg1496. The C-terminal domain, which is conserved among the SidE family of effectors, is formed of two largely alpha-helical lobes with a nucleotide-binding cleft. A structural homology search has shown similarity to phosphodiesterases involved in cleavage of cyclic nucleotides. We have also crystallized a novel domain that occurs twice in the N-terminal half of the protein that we term KLAMP domains due to the presence of homologous domains in bacterial histidine kinase-like ATP-binding region-containing proteins and S-adenosylmethionine-dependent methyltransferase proteins. Both KLAMP structures are very similar but selectively bind 3',5'-cAMP and ADP. A co-crystal of the KLAMP1 domain with 3',5'-cAMP reveals the contribution of Tyr61 and Tyr69 that produce pi-stacking interactions with the adenine ring of the nucleotide. Our study provides the first structural insights into two novel nucleotide-binding domains associated with bacterial virulence. Structure of the Legionella Effector, lpg1496, Suggests a Role in Nucleotide Metabolism.,Wong K, Kozlov G, Zhang Y, Gehring K J Biol Chem. 2015 Aug 20. pii: jbc.M115.671263. PMID:26294765 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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