4c7r: Difference between revisions

<table><tr><td colspan='2'>[[4c7r]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/"micrococcus_glutamicus"_kinoshita_et_al._1958 "micrococcus glutamicus" kinoshita et al. 1958]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4C7R OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4C7R FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=CM5:5-CYCLOHEXYL-1-PENTYL-BETA-D-MALTOSIDE'>CM5</scene>, <scene name='pdbligand=FLC:CITRATE+ANION'>FLC</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene>, <scene name='pdbligand=PGT:(1S)-2-{[{[(2R)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL+STEARATE'>PGT</scene></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=4c7r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4c7r OCA], [http://pdbe.org/4c7r PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4c7r RCSB], [http://www.ebi.ac.uk/pdbsum/4c7r PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4c7r ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/BETP_CORGL BETP_CORGL]] High-affinity uptake of glycine betaine (By similarity).

Bilayer lipids contribute to the stability of membrane transporters and are crucially involved in their proper functioning. However, the molecular knowledge of how surrounding lipids affect membrane transport is surprisingly limited and despite its general importance is rarely considered in the molecular description of a transport mechanism. One reason is that only few atomic resolution structures of channels or transporters reveal a functional interaction with lipids, which are difficult to detect in X-ray structures per se. Overcoming these difficulties, we report here on a new structure of the osmotic stress-regulated betaine transporter BetP in complex with anionic lipids. This lipid-associated BetP structure is important in the molecular understanding of osmoregulation due to the strong dependence of activity regulation in BetP on the presence of negatively charged lipids. We detected eight resolved palmitoyl-oleoyl phosphatidyl glycerol (PG) lipids mimicking parts of the membrane leaflets and interacting with key residues in transport and regulation. The lipid-protein interactions observed here in structural detail in BetP provide molecular insights into the role of lipids in osmoregulated secondary transport.

 

== References ==

[[Category: Micrococcus glutamicus kinoshita et al. 1958]]

[[Category: Koshy, C]]

[[Category: Yildiz, O]]

[[Category: Ziegler, C]]

[[Category: Transport]]