3s60: Difference between revisions

From Proteopedia
Jump to navigationJump to search
← Older edit
OCA (talk | contribs)
Bots, Bureaucrats, journal, Administrators
3,331,613 edits
No edit summary
OCA (talk | contribs)
Bots, Bureaucrats, journal, Administrators
3,331,613 edits
No edit summary
 
(3 intermediate revisions by the same user not shown)
Line 1: Line 1:
==Structure of the cyanobacterial Oscillatoria Agardhii Agglutinin (OAA) in free state obtained at 25 degree Celsius==
==Structure of the cyanobacterial Oscillatoria Agardhii Agglutinin (OAA) in free state obtained at 25 degree Celsius==
<StructureSection load='3s60' size='340' side='right' caption='[[3s60]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
<StructureSection load='3s60' size='340' side='right'caption='[[3s60]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[3s60]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Planktothrix_agardhii Planktothrix agardhii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3S60 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3S60 FirstGlance]. <br>
<table><tr><td colspan='2'>[[3s60]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Planktothrix_agardhii Planktothrix agardhii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3S60 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3S60 FirstGlance]. <br>
</td></tr><tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3s5v|3s5v]], [[3s5x|3s5x]], [[3obl|3obl]]</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]] 1.6&#8491;</td></tr>
<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">OAA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1160 Planktothrix agardhii])</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=3s60 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3s60 OCA], [https://pdbe.org/3s60 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3s60 RCSB], [https://www.ebi.ac.uk/pdbsum/3s60 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3s60 ProSAT]</span></td></tr>
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3s60 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3s60 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3s60 RCSB], [http://www.ebi.ac.uk/pdbsum/3s60 PDBsum]</span></td></tr>
</table>
<table>
== Function ==
<div style="background-color:#fffaf0;">
[https://www.uniprot.org/uniprot/LEC1_PLAAG LEC1_PLAAG] Lectin specific for high mannose N-glycans, recognizes the branched moiety of these glycans. Does not recognize other types of N-glycans or monosaccharides. Agglutinates trypsin-treated rabbit erythrocytes. Does not require divalent cations for activity. Inhibits HIV replication in MT4 cells with an EC(50) of 45 nM. Binds to the HIV envelope glycoprotein gp120.<ref>PMID:10817903</ref> <ref>PMID:17314091</ref>  
== Publication Abstract from PubMed ==
The cyanobacterial Oscillatory Agardhii agglutinin (OAA) is a recently discovered HIV-inactivating lectin that interacts with high-mannose sugars. Nuclear magnetic resonance (NMR) binding studies between OAA and alpha3,alpha6-mannopentaose (Manalpha(1-3)[Manalpha(1-3)[Manalpha(1-6)]Manalpha(1-6)]Man), the branched core unit of Man-9, revealed two binding sites at opposite ends of the protein, exhibiting essentially identical affinities. Atomic details of the specific protein-sugar contacts in the recognition loops of OAA were delineated in the high-resolution crystal structures of free and glycan-complexed protein. No major changes in the overall protein structure are induced by carbohydrate binding, with essentially identical apo- and sugar-bound conformations in binding site 1. A single peptide bond flip at W77-G78 is seen in binding site 2. Our combined NMR and crystallographic results provide structural insights into the mechanism by which OAA specifically recognizes the branched Man-9 core, distinctly different from the recognition of the D1 and D3 arms at the nonreducing end of high-mannose carbohydrates by other antiviral lectins.
 
Structural basis of the anti-HIV activity of the cyanobacterial Oscillatoria Agardhii agglutinin.,Koharudin LM, Gronenborn AM Structure. 2011 Aug 10;19(8):1170-81. PMID:21827952<ref>PMID:21827952</ref>


From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br>
==See Also==
</div>
*[[Agglutinin 3D structures|Agglutinin 3D structures]]
== References ==
== References ==
<references/>
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Large Structures]]
[[Category: Planktothrix agardhii]]
[[Category: Planktothrix agardhii]]
[[Category: Gronenborn, A M.]]
[[Category: Gronenborn AM]]
[[Category: Koharudin, L M.I.]]
[[Category: Koharudin LMI]]
[[Category: Anti-hiv lectin]]
[[Category: Beta barrel like fold]]
[[Category: Carbohydrate]]
[[Category: Protein binding]]
Retrieved from "https://proteopedia.org/3s60"