1pv7: Difference between revisions
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==Crystal structure of lactose permease with TDG== | ==Crystal structure of lactose permease with TDG== | ||
<StructureSection load='1pv7' size='340' side='right' caption='[[1pv7]], [[Resolution|resolution]] 3.60Å' scene=''> | <StructureSection load='1pv7' size='340' side='right' caption='[[1pv7]], [[Resolution|resolution]] 3.60Å' scene=''> | ||
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=TDG:THIODIGALACTOSIDE'>TDG</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=TDG:THIODIGALACTOSIDE'>TDG</scene></td></tr> | ||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1pv6|1pv6]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1pv6|1pv6]]</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=1pv7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1pv7 OCA], [http://pdbe.org/1pv7 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1pv7 RCSB], [http://www.ebi.ac.uk/pdbsum/1pv7 PDBsum]</span></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=1pv7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1pv7 OCA], [http://pdbe.org/1pv7 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1pv7 RCSB], [http://www.ebi.ac.uk/pdbsum/1pv7 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1pv7 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/pv/1pv7_consurf.spt"</scriptWhenChecked> | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/pv/1pv7_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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==See Also== | ==See Also== | ||
*[[Major Facilitators|Major Facilitators]] | *[[Major Facilitators|Major Facilitators]] | ||
== References == | == References == | ||
Revision as of 11:17, 24 February 2018
Crystal structure of lactose permease with TDGCrystal structure of lactose permease with TDG
Structural highlights
Function[LACY_ECOLI] Responsible for transport of beta-galactosides into the cell, with the concomitant import of a proton (symport system). 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 PubMedMembrane transport proteins that transduce free energy stored in electrochemical ion gradients into a concentration gradient are a major class of membrane proteins. We report the crystal structure at 3.5 angstroms of the Escherichia coli lactose permease, an intensively studied member of the major facilitator superfamily of transporters. The molecule is composed of N- and C-terminal domains, each with six transmembrane helices, symmetrically positioned within the permease. A large internal hydrophilic cavity open to the cytoplasmic side represents the inward-facing conformation of the transporter. The structure with a bound lactose homolog, beta-D-galactopyranosyl-1-thio-beta-D-galactopyranoside, reveals the sugar-binding site in the cavity, and residues that play major roles in substrate recognition and proton translocation are identified. We propose a possible mechanism for lactose/proton symport (co-transport) consistent with both the structure and a large body of experimental data. Structure and mechanism of the lactose permease of Escherichia coli.,Abramson J, Smirnova I, Kasho V, Verner G, Kaback HR, Iwata S Science. 2003 Aug 1;301(5633):610-5. PMID:12893935[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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