1urp: Difference between revisions
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==D-RIBOSE-BINDING PROTEIN FROM ESCHERICHIA COLI== | ==D-RIBOSE-BINDING PROTEIN FROM ESCHERICHIA COLI== | ||
<StructureSection load='1urp' size='340' side='right' caption='[[1urp]], [[Resolution|resolution]] 2.30Å' scene=''> | <StructureSection load='1urp' size='340' side='right' caption='[[1urp]], [[Resolution|resolution]] 2.30Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1urp]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1URP OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1URP FirstGlance]. <br> | <table><tr><td colspan='2'>[[1urp]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1URP OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1URP FirstGlance]. <br> | ||
</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1urp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1urp OCA], [http://pdbe.org/1urp PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1urp RCSB], [http://www.ebi.ac.uk/pdbsum/1urp PDBsum]</span></td></tr> | </td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1urp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1urp OCA], [http://pdbe.org/1urp PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1urp RCSB], [http://www.ebi.ac.uk/pdbsum/1urp PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1urp ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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Check<jmol> | Check<jmol> | ||
<jmolCheckbox> | <jmolCheckbox> | ||
<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ur/1urp_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ur/1urp_consurf.spt"</scriptWhenChecked> | ||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
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[[Category: Mowbray, S L]] | [[Category: Mowbray, S L]] | ||
[[Category: Chemotaxis]] | [[Category: Chemotaxis]] | ||
[[Category: Periplasm]] | |||
[[Category: Transport]] | [[Category: Transport]] | ||
Revision as of 10:54, 28 March 2018
D-RIBOSE-BINDING PROTEIN FROM ESCHERICHIA COLID-RIBOSE-BINDING PROTEIN FROM ESCHERICHIA COLI
Structural highlights
Function[RBSB_ECOLI] Involved in the high-affinity D-ribose membrane transport system and also serves as the primary chemoreceptor for chemotaxis. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedConformational changes are necessary for the function of bacterial periplasmic receptors in chemotaxis and transport. Such changes allow entry and exit of ligand, and enable the correct interaction of the ligand-bound proteins with the membrane components of each system. Three open, ligand-free forms of the Escherichia coli ribose-binding protein were observed here by X-ray crystallographic studies. They are opened by 43 degrees, 50 degrees and 64 degrees with respect to the ligand-bound protein reported previously. The three open forms are not distinct, but show a clear relationship to each other. All are the product of a similar opening motion, and are stabilized by a new, almost identical packing interface between the domains. The changes are generated by similar bond rotations, although some differences in the three hinge segments are needed to accommodate the various structural scenarios. Some local repacking also occurs as interdomain contacts are lost. The least open (43 degrees) form is probably the dominant one in solution under normal conditions, although a mixture of species seems likely. The open and closed forms have distinct surfaces in the regions known to be important in chemotaxis and transport, which will differentiate their interactions with the membrane components. It seems certain that the conformational path that links the forms described here is that followed during ligand retrieval, and in ligand release into the membrane-bound permease system. Multiple open forms of ribose-binding protein trace the path of its conformational change.,Bjorkman AJ, Mowbray SL J Mol Biol. 1998 Jun 12;279(3):651-64. PMID:9641984[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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