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2jec

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Revision as of 07:44, 25 December 2014

CRYSTAL STRUCTURE OF RECOMBINANT DIOCLEA GRANDIFLORA LECTIN MUTANT E123A-H131N-K132Q COMPLEXED WITH 5-BROMO-4-CHLORO-3-INDOLYL-A-D-MANNOSE

Structural highlights

2jec is a 4 chain structure with sequence from Dioclea grandiflora. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Related:	1dgl, 1vln, 2je9, 2jdz, 2je7
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[LECA_DIOGR] D-mannose/D-glucose-binding lectin. Has anti-inflammatory activity in rats. Induces histamine release in mast cells from rat. Induces lymphocyte proliferation and IFNG production. Shows toxicity against the aquatic snail B.glabrata at concentrations higher than 50 ug/ml.^[1] ^[2] ^[3] ^[4] ^[5] ^[6]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

The structural ground underlying the pH-dependency of the dimer-tetramer transition of Diocleinae lectins was investigated by equilibrium sedimentation and X-ray crystal structure determination of wild-type and site-directed mutants of recombinant lectins. Synthetic genes coding for the full-length alpha-chains of the seed lectins of Dioclea guianensis (termed r-alphaDguia) and Dioclea grandiflora (termed r-alphaDGL) were designed and expressed in Escherichia coli. This pioneering approach, which will be described in detail in the present paper, yielded recombinant lectins displaying carbohydrate-binding activity, dimer-tetramer equilibria and crystal structures indistinguishable from their natural homologues. Conversion of the pH-stable tetrameric r-alphaDGL into a structure exhibiting pH-dependent dimer-tetramer transition was accomplished through mutations that abolished the interdimeric interactions at the central cavity of the tetrameric lectins. Both the central and the peripheral interacting regions bear structural information for formation of the canonical legume lectin tetramer. We hypothesize that the strength of the ionic contacts at these sites may be modulated by the pH, leading to dissociation of those lectin structures that are not locked into a pH-stable tetramer through interdimeric contacts networking the central cavity loops.

Insights into the structural basis of the pH-dependent dimer-tetramer equilibrium through crystallographic analysis of recombinant Diocleinae lectins.,Nagano CS, Calvete JJ, Barettino D, Perez A, Cavada BS, Sanz L Biochem J. 2008 Jan 15;409(2):417-28. PMID:17937659^[7]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Barral-Netto M, Santos SB, Barral A, Moreira LI, Santos CF, Moreira RA, Oliveira JT, Cavada BS. Human lymphocyte stimulation by legume lectins from the Diocleae tribe. Immunol Invest. 1992 Jul;21(4):297-303. PMID:1398779
↑ Gomes JC, Ferreira RR, Cavada BS, Moreira RA, Oliveira JT. Histamine release induced by glucose (mannose)-specific lectins isolated from Brazilian beans. Comparison with concanavalin A. Agents Actions. 1994 May;41(3-4):132-5. PMID:7524287
↑ Assreuy AM, Shibuya MD, Martins GJ, De Souza ML, Cavada BS, Moreira RA, Oliveira JT, Ribeiro RA, Flores CA. Anti-inflammatory effect of glucose-mannose binding lectins isolated from Brazilian beans. Mediators Inflamm. 1997;6(3):201-10. PMID:18472821 doi:http://dx.doi.org/10.1080/09629359791695
↑ Dam TK, Cavada BS, Grangeiro TB, Santos CF, de Sousa FA, Oscarson S, Brewer CF. Diocleinae lectins are a group of proteins with conserved binding sites for the core trimannoside of asparagine-linked oligosaccharides and differential specificities for complex carbohydrates. J Biol Chem. 1998 May 15;273(20):12082-8. PMID:9575151
↑ Dam TK, Cavada BS, Grangeiro TB, Santos CF, Ceccatto VM, de Sousa FA, Oscarson S, Brewer CF. Thermodynamic binding studies of lectins from the diocleinae subtribe to deoxy analogs of the core trimannoside of asparagine-linked oligosaccharides. J Biol Chem. 2000 May 26;275(21):16119-26. PMID:10747944 doi:http://dx.doi.org/10.1074/jbc.M000670200
↑ dos Santos AF, Cavada BS, da Rocha BA, do Nascimento KS, Sant'Ana AE. Toxicity of some glucose/mannose-binding lectins to Biomphalaria glabrata and Artemia salina. Bioresour Technol. 2010 Jan;101(2):794-8. doi: 10.1016/j.biortech.2009.07.062., Epub 2009 Sep 17. PMID:19765980 doi:http://dx.doi.org/10.1016/j.biortech.2009.07.062
↑ Nagano CS, Calvete JJ, Barettino D, Perez A, Cavada BS, Sanz L. Insights into the structural basis of the pH-dependent dimer-tetramer equilibrium through crystallographic analysis of recombinant Diocleinae lectins. Biochem J. 2008 Jan 15;409(2):417-28. PMID:17937659 doi:10.1042/BJ20070942

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/2jec"

@@ Line 3: / Line 3: @@
 == Structural highlights ==
 <table><tr><td colspan='2'>[[2jec]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Dioclea_grandiflora Dioclea grandiflora]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2JEC OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2JEC FirstGlance]. <br>
-</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=XMM:(2R,3S,4S,5S,6R)-2-(5-BROMO-4-CHLORO-1H-INDOL-3-YLOXY)-TETRAHYDRO-6-(HYDROXYMETHYL)-2H-PYRAN-3,4,5-TRIOL'>XMM</scene><br>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=XMM:(2R,3S,4S,5S,6R)-2-(5-BROMO-4-CHLORO-1H-INDOL-3-YLOXY)-TETRAHYDRO-6-(HYDROXYMETHYL)-2H-PYRAN-3,4,5-TRIOL'>XMM</scene></td></tr>
-<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1dgl|1dgl]], [[1vln|1vln]], [[2je9|2je9]], [[2jdz|2jdz]], [[2je7|2je7]]</td></tr>
+<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1dgl|1dgl]], [[1vln|1vln]], [[2je9|2je9]], [[2jdz|2jdz]], [[2je7|2je7]]</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=2jec FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2jec OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2jec RCSB], [http://www.ebi.ac.uk/pdbsum/2jec PDBsum]</span></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=2jec FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2jec OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2jec RCSB], [http://www.ebi.ac.uk/pdbsum/2jec PDBsum]</span></td></tr>
-<table>
+</table>
+== Function ==
+[[http://www.uniprot.org/uniprot/LECA_DIOGR LECA_DIOGR]] D-mannose/D-glucose-binding lectin. Has anti-inflammatory activity in rats. Induces histamine release in mast cells from rat. Induces lymphocyte proliferation and IFNG production. Shows toxicity against the aquatic snail B.glabrata at concentrations higher than 50 ug/ml.<ref>PMID:1398779</ref> <ref>PMID:7524287</ref> <ref>PMID:18472821</ref> <ref>PMID:9575151</ref> <ref>PMID:10747944</ref> <ref>PMID:19765980</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 30: / Line 32: @@
 </StructureSection>
 [[Category: Dioclea grandiflora]]
-[[Category: Calvete, J J.]]
+[[Category: Calvete, J J]]
-[[Category: Cavada, B S.]]
+[[Category: Cavada, B S]]
-[[Category: Nagano, C S.]]
+[[Category: Nagano, C S]]
-[[Category: Sanz, L.]]
+[[Category: Sanz, L]]
 [[Category: Carbohydrate binding protein]]
 [[Category: Cona-like]]

2jec

From Proteopedia

Revision as of 07:44, 25 December 2014

CRYSTAL STRUCTURE OF RECOMBINANT DIOCLEA GRANDIFLORA LECTIN MUTANT E123A-H131N-K132Q COMPLEXED WITH 5-BROMO-4-CHLORO-3-INDOLYL-A-D-MANNOSE

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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