5xu1

Structure of a non-canonical ABC transporter from Streptococcus pneumoniae R6

spinqualitylabelsall models 5xu1, resolution 3.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5xu1 is a 4 chain structure with sequence from Streptococcus pneumoniae R6. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 3.3Å Ligands: MG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q8DQF8_STRR6 Publication Abstract from PubMed The spr0693-spr0694-spr0695 operon of Streptococcus pneumoniae encodes a putative ATP-binding cassette (ABC)-type efflux pump involved in the resistance of antibiotics and antimicrobial peptides. Here we report the crystal structures of Spr0694-0695 at 3.3 A and Spr0693 at 3.0 A resolution, revealing a MacAB-like efflux pump. The dimeric Spr0694-0695 adopts a non-canonical fold of ABC transporter, the transmembrane domain of which consists of eight tightly packed transmembrane helices with an insertion of extracellular domain between the first and second helices, whereas Spr0693 forms a nanotube channel docked onto the ABC transporter. Structural analyses combined with ATPase activity and antimicrobial susceptibility assays, enable us to propose a putative substrate-entrance tunnel with a lateral access controlled by a guard helix. Altogether, our findings provide structural insights and putative transport mechanism of a MacAB-like efflux pump in Gram-positive bacteria. Structure of a MacAB-like efflux pump from Streptococcus pneumoniae.,Yang HB, Hou WT, Cheng MT, Jiang YL, Chen Y, Zhou CZ Nat Commun. 2018 Jan 15;9(1):196. doi: 10.1038/s41467-017-02741-4. PMID:29335499 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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