3puz: Difference between revisions

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[[Image:3puz.png|left|200px]]


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==Crystal Structure of a pre-translocation state MBP-Maltose transporter complex bound to AMP-PNP==
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<StructureSection load='3puz' size='340' side='right'caption='[[3puz]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
You may change the PDB parameter (which sets the PDB file loaded into the applet)  
== Structural highlights ==
or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
<table><tr><td colspan='2'>[[3puz]] is a 5 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3PUZ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3PUZ FirstGlance]. <br>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.9&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ANP:PHOSPHOAMINOPHOSPHONIC+ACID-ADENYLATE+ESTER'>ANP</scene>, <scene name='pdbligand=GLC:ALPHA-D-GLUCOSE'>GLC</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=PGV:(1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL+(11E)-OCTADEC-11-ENOATE'>PGV</scene>, <scene name='pdbligand=PRD_900001:alpha-maltose'>PRD_900001</scene></td></tr>
{{STRUCTURE_3puz|  PDB=3puz  |  SCENE= }}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3puz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3puz OCA], [https://pdbe.org/3puz PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3puz RCSB], [https://www.ebi.ac.uk/pdbsum/3puz PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3puz ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/MALE_ECOLI MALE_ECOLI] Involved in the high-affinity maltose membrane transport system MalEFGK. Initial receptor for the active transport of and chemotaxis toward maltooligosaccharides.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Adenosine triphosphate (ATP)-binding cassette (ABC) transporters convert chemical energy from ATP hydrolysis to mechanical work for substrate translocation. They function by alternating between two states, exposing the substrate-binding site to either side of the membrane. A key question that remains to be addressed is how substrates initiate the transport cycle. Using x-ray crystallography, we have captured the maltose transporter in an intermediate step between the inward- and outward-facing states. We show that interactions with substrate-loaded maltose-binding protein in the periplasm induce a partial closure of the MalK dimer in the cytoplasm. ATP binding to this conformation then promotes progression to the outward-facing state. These results, interpreted in light of biochemical and functional studies, provide a structural basis to understand allosteric communication in ABC transporters.


===Crystal Structure of a pre-translocation state MBP-Maltose transporter complex bound to AMP-PNP===
Crystal structure of the maltose transporter in a pretranslocation intermediate state.,Oldham ML, Chen J Science. 2011 Jun 3;332(6034):1202-5. Epub 2011 May 12. PMID:21566157<ref>PMID:21566157</ref>


From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3puz" style="background-color:#fffaf0;"></div>


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==See Also==
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*[[Maltose-binding protein 3D structures|Maltose-binding protein 3D structures]]
(as it appears on PubMed at http://www.pubmed.gov), where 21566157 is the PubMed ID number.
== References ==
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<references/>
{{ABSTRACT_PUBMED_21566157}}
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</StructureSection>
==About this Structure==
[[Category: Escherichia coli K-12]]
[[3puz]] is a 5 chain structure with sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3PUZ OCA].
[[Category: Large Structures]]
 
[[Category: Chen J]]
==Reference==
[[Category: Oldham ML]]
<ref group="xtra">PMID:021566157</ref><references group="xtra"/>
[[Category: Escherichia coli]]
[[Category: Chen, J.]]
[[Category: Oldham, M L.]]
[[Category: Abc transporter]]
[[Category: Atp binding]]
[[Category: Atp binding cassette]]
[[Category: Atpase]]
[[Category: Importer]]
[[Category: Maltodextrin binding]]
[[Category: Membrane protein]]
[[Category: Nucleotide binding domain]]
[[Category: Substrate binding protein]]
[[Category: Transmembrane integral membrane]]
[[Category: Transport protein]]
Retrieved from "https://proteopedia.org/3puz"