3QUJ
Crystal structure of the phosphonate binding protein, PhnD, from Escherichia coli
Summary for 3QUJ
| Entry DOI | 10.2210/pdb3quj/pdb |
| Related | 3P7I 3QK6 |
| Descriptor | PhnD, subunit of alkylphosphonate ABC transporter, UNKNOWN LIGAND (3 entities in total) |
| Functional Keywords | bind and transport of phosphonates, transport protein |
| Biological source | Escherichia coli UTI89 |
| Total number of polymer chains | 4 |
| Total formula weight | 144546.86 |
| Authors | Alicea, I.,Schreiter, E.R. (deposition date: 2011-02-24, release date: 2011-10-12, Last modification date: 2024-11-06) |
| Primary citation | Alicea, I.,Marvin, J.S.,Miklos, A.E.,Ellington, A.D.,Looger, L.L.,Schreiter, E.R. Structure of the Escherichia coli Phosphonate Binding Protein PhnD and Rationally Optimized Phosphonate Biosensors. J.Mol.Biol., 414:356-369, 2011 Cited by PubMed Abstract: The phnD gene of Escherichia coli encodes the periplasmic binding protein of the phosphonate (Pn) uptake and utilization pathway. We have crystallized and determined structures of E. coli PhnD (EcPhnD) in the absence of ligand and in complex with the environmentally abundant 2-aminoethylphosphonate (2AEP). Similar to other bacterial periplasmic binding proteins, 2AEP binds near the center of mass of EcPhnD in a cleft formed between two lobes. Comparison of the open, unliganded structure with the closed 2AEP-bound structure shows that the two lobes pivot around a hinge by ~70° between the two states. Extensive hydrogen bonding and electrostatic interactions stabilize 2AEP, which binds to EcPhnD with low nanomolar affinity. These structures provide insight into Pn uptake by bacteria and facilitated the rational design of high signal-to-noise Pn biosensors based on both coupled small-molecule dyes and autocatalytic fluorescent proteins. PubMed: 22019591DOI: 10.1016/j.jmb.2011.09.047 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.2 Å) |
Structure validation
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