5lv1

2.12 A resolution structure of PtxB from Prochlorococcus marinus (MIT 9301) in complex with phosphite

spinqualitylabelsall models 5lv1, resolution 2.12Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5lv1 is a 3 chain structure with sequence from Prochlorococcus marinus str. MIT 9301. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.12Å Ligands: 78T Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function PHND2_PROM0 Probably part of the ABC transporter complex PhnC2D2E2. Binds strongly to methylphosphonate (MPn), ethylphosphonate (EPn) and inorganic phosphite. Publication Abstract from PubMed Inorganic phosphate is the major bioavailable form of the essential nutrient phosphorus. However, the concentration of phosphate in most natural habitats is low enough to limit microbial growth. Under phosphate-depleted conditions some bacteria utilise phosphite and hypophosphite as alternative sources of phosphorus, but the molecular basis of reduced phosphorus acquisition from the environment is not fully understood. Here, we present crystal structures and ligand binding affinities of periplasmic binding proteins from bacterial phosphite and hypophosphite ATP-binding cassette transporters. We reveal that phosphite and hypophosphite specificity results from a combination of steric selection and the presence of a P-H...pi interaction between the ligand and a conserved aromatic residue in the ligand-binding pocket. The characterisation of high affinity and specific transporters has implications for the marine phosphorus redox cycle, and might aid the use of phosphite as an alternative phosphorus source in biotechnological, industrial and agricultural applications. The molecular basis of phosphite and hypophosphite recognition by ABC-transporters.,Bisson C, Adams NBP, Stevenson B, Brindley AA, Polyviou D, Bibby TS, Baker PJ, Hunter CN, Hitchcock A Nat Commun. 2017 Nov 23;8(1):1746. doi: 10.1038/s41467-017-01226-8. PMID:29170493 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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