View source for 6nwr


==Thioester acyl-intermediate of Apolipoprotein N-acyltransferase (Lnt)==
<StructureSection load='6nwr' size='340' side='right'caption='[[6nwr]], [[Resolution|resolution]] 3.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6nwr]] is a 2 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=6NWR OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6NWR FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.5&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=D12:DODECANE'>D12</scene>, <scene name='pdbligand=LMT:DODECYL-BETA-D-MALTOSIDE'>LMT</scene>, <scene name='pdbligand=P1L:S-PALMITOYL-L-CYSTEINE'>P1L</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=6nwr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6nwr OCA], [https://pdbe.org/6nwr PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6nwr RCSB], [https://www.ebi.ac.uk/pdbsum/6nwr PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6nwr ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/LNT_ECOLI LNT_ECOLI] Transfers the fatty acyl group on membrane lipoproteins.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Lipoproteins are important components of the cell envelope and are responsible for many essential cellular functions. They are produced by the post-translational covalent attachment of lipids that occurs via a sequential 3-step process controlled by three integral membrane enzymes. The last step of this process, unique to Gram-negative bacteria, is the N-acylation of the terminal cysteine by Apolipoprotein N-acyltransferase (Lnt) to form the final mature lipoprotein. Here we report 2 crystal forms of Lnt from Escherichia coli. In one form we observe a highly dynamic arm that is able to restrict access to the active site as well as a covalent modification to the active site cysteine consistent with the thioester acyl-intermediate. In the second form, the enzyme crystallized in an open conformation exposing the active site to the environment. In total we observe 3 unique Lnt molecules that when taken together suggest the movement of essential loops and residues are triggered by substrate binding that could control the interaction between Lnt and the incoming substrate apolipoprotein. The results provide a dynamic context for residues shown to be central for Lnt function and provide further insights into its mechanism.

Conformational changes in Apolipoprotein N-acyltransferase (Lnt).,Wiseman B, Hogbom M Sci Rep. 2020 Jan 20;10(1):639. doi: 10.1038/s41598-020-57419-7. PMID:31959792<ref>PMID:31959792</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6nwr" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Escherichia coli K-12]]
[[Category: Large Structures]]
[[Category: Hogbom M]]
[[Category: Wiseman B]]