4d2b: Difference between revisions
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== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[4d2b]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptococcus_thermophilus_LMG_18311 Streptococcus thermophilus LMG 18311]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4D2B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4D2B FirstGlance]. <br> | <table><tr><td colspan='2'>[[4d2b]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptococcus_thermophilus_LMG_18311 Streptococcus thermophilus LMG 18311]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4D2B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4D2B FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=78M:(2S)-2,3-DIHYDROXYPROPYL(7Z)-PENTADEC-7-ENOATE'>78M</scene>, <scene name='pdbligand=78N:(2R)-2,3-DIHYDROXYPROPYL(7Z)-PENTADEC-7-ENOATE'>78N</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></td></tr> | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.35Å</td></tr> | ||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=78M:(2S)-2,3-DIHYDROXYPROPYL(7Z)-PENTADEC-7-ENOATE'>78M</scene>, <scene name='pdbligand=78N:(2R)-2,3-DIHYDROXYPROPYL(7Z)-PENTADEC-7-ENOATE'>78N</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene></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=4d2b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4d2b OCA], [https://pdbe.org/4d2b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4d2b RCSB], [https://www.ebi.ac.uk/pdbsum/4d2b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4d2b ProSAT]</span></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=4d2b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4d2b OCA], [https://pdbe.org/4d2b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4d2b RCSB], [https://www.ebi.ac.uk/pdbsum/4d2b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4d2b ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
[https://www.uniprot.org/uniprot/Q5M4H8_STRT2 Q5M4H8_STRT2] | |||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
Latest revision as of 15:19, 20 December 2023
Structure of a ligand free POT family peptide transporterStructure of a ligand free POT family peptide transporter
Structural highlights
FunctionPublication Abstract from PubMedAn enigma in the field of peptide transport is the structural basis for ligand promiscuity, as exemplified by PepT1, the mammalian plasma membrane peptide transporter. Here, we present crystal structures of di- and tripeptide-bound complexes of a bacterial homologue of PepT1, which reveal at least two mechanisms for peptide recognition that operate within a single, centrally located binding site. The dipeptide was orientated laterally in the binding site, whereas the tripeptide revealed an alternative vertical binding mode. The co-crystal structures combined with functional studies reveal that biochemically distinct peptide-binding sites likely operate within the POT/PTR family of proton-coupled symporters and suggest that transport promiscuity has arisen in part through the ability of the binding site to accommodate peptides in multiple orientations for transport. Structural basis for polyspecificity in the POT family of proton-coupled oligopeptide transporters.,Lyons JA, Parker JL, Solcan N, Brinth A, Li D, Shah ST, Caffrey M, Newstead S EMBO Rep. 2014 Jun 10. pii: e201338403. PMID:24916388[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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