View source for 6rs9


==X-ray crystal structure of LsAA9B (xylotetraose soak)==
<StructureSection load='6rs9' size='340' side='right'caption='[[6rs9]], [[Resolution|resolution]] 1.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6rs9]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Panus_similis Panus similis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6RS9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6RS9 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]] 1.4&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BCN:BICINE'>BCN</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=XYP:BETA-D-XYLOPYRANOSE'>XYP</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=6rs9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6rs9 OCA], [https://pdbe.org/6rs9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6rs9 RCSB], [https://www.ebi.ac.uk/pdbsum/6rs9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6rs9 ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Lytic polysaccharide monooxygenases (LPMOs) are redox-enzymes involved in biomass degradation. All characterized LPMOs possess an active site of two highly conserved histidine residues coordinating a copper ion (the histidine brace), which are essential for LPMO activity. However, some protein sequences that belong to the AA9 LPMO family display a natural N-terminal His to Arg substitution (Arg-AA9). These are found almost entirely in the phylogenetic fungal class Agaricomycetes, associated with wood decay, but no function has been demonstrated for any Arg-AA9. Through bioinformatics, transcriptomic, and proteomic analyses we present data, which suggest that Arg-AA9 proteins could have a hitherto unidentified role in fungal degradation of lignocellulosic biomass in conjunction with other secreted fungal enzymes. We present the first structure of an Arg-AA9, LsAA9B, a naturally occurring protein from Lentinus similis The LsAA9B structure reveals gross changes in the region equivalent to the canonical LPMO copper-binding site, whereas features implicated in carbohydrate binding in AA9 LPMOs have been maintained. We obtained a structure of LsAA9B with xylotetraose bound on the surface of the protein although with a considerably different binding mode compared with other AA9 complex structures. In addition, we have found indications of protein phosphorylation near the N-terminal Arg and the carbohydrate-binding site, for which the potential function is currently unknown. Our results are strong evidence that Arg-AA9s function markedly different from canonical AA9 LPMO, but nonetheless, may play a role in fungal conversion of lignocellulosic biomass.

Insights into an unusual Auxiliary Activity 9 family member lacking the histidine brace motif of lytic polysaccharide monooxygenases.,Frandsen KEH, Tovborg M, Jorgensen CI, Spodsberg N, Rosso MN, Hemsworth GR, Garman EF, Grime GW, Poulsen JN, Batth TS, Miyauchi S, Lipzen A, Daum C, Grigoriev IV, Johansen KS, Henrissat B, Berrin JG, Lo Leggio L J Biol Chem. 2019 Nov 8;294(45):17117-17130. doi: 10.1074/jbc.RA119.009223. Epub , 2019 Aug 30. PMID:31471321<ref>PMID:31471321</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6rs9" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Panus similis]]
[[Category: Frandsen KEH]]
[[Category: Johansen KS]]
[[Category: Lo Leggio L]]
[[Category: Poulsen JCN]]
[[Category: Tovborg M]]