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==Solution NMR structure of Pseudomonas aeruginosa TonB CTD==
<StructureSection load='6fip' size='340' side='right'caption='[[6fip]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6fip]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Pseudomonas_aeruginosa Pseudomonas aeruginosa]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6FIP OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6FIP FirstGlance]. <br>
</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6fip FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6fip OCA], [https://pdbe.org/6fip PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6fip RCSB], [https://www.ebi.ac.uk/pdbsum/6fip PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6fip ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/TONB_PSEAE TONB_PSEAE] Interacts with outer membrane receptor proteins that carry out high-affinity binding and energy dependent uptake into the periplasmic space of specific substrates. It could act to transduce energy from the cytoplasmic membrane to specific energy-requiring processes in the outer membrane, resulting in the release into the periplasm of ligands bound by these outer membrane proteins (By similarity).
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== Publication Abstract from PubMed ==
The TonB protein plays an essential role in the energy transduction system to drive active transport across the outer membrane (OM) using the proton-motive force of the cytoplasmic membrane of Gram-negative bacteria. The C-terminal domain (CTD) of TonB protein is known to interact with the conserved TonB box motif of TonB-dependent OM transporters, which likely induces structural changes in the OM transporters. Several distinct conformations of differently dissected CTDs of Escherichia coli TonB have been previously reported. Here we determined the solution NMR structure of a 96-residue fragment of Pseudomonas aeruginosa TonB (PaTonB-96). The structure shows a monomeric structure with the flexible C-terminal region (residues 338-342), different from the NMR structure of E. coli TonB (EcTonB-137). The extended and flexible C-terminal residues are confirmed by (15)N relaxation analysis and molecular dynamics simulation. We created models for the PaTonB-96/TonB box interaction and propose that the internal fluctuations of PaTonB-96 makes it more accessible for the interactions with the TonB box and possibly plays a role in disrupting the plug domain of the TonB-dependent OM transporters.

NMR structure of the C-terminal domain of TonB protein from Pseudomonas aeruginosa.,Oeemig JS, Ollila OHS, Iwai H PeerJ. 2018 Aug 27;6:e5412. doi: 10.7717/peerj.5412. eCollection 2018. PMID:30186676<ref>PMID:30186676</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
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==See Also==
*[[TonB|TonB]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Pseudomonas aeruginosa]]
[[Category: Heikkinen HA]]
[[Category: Iwai H]]
[[Category: Oeemig JS]]
[[Category: Samuli Ollila OH]]