1j4u: Difference between revisions
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==Structure of Artocarpin Complexed with Me-alpha-Mannose== | ==Structure of Artocarpin Complexed with Me-alpha-Mannose== | ||
<StructureSection load='1j4u' size='340' side='right' caption='[[1j4u]], [[Resolution|resolution]] 2.90Å' scene=''> | <StructureSection load='1j4u' size='340' side='right'caption='[[1j4u]], [[Resolution|resolution]] 2.90Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1j4u]] is a 4 chain structure with sequence from [ | <table><tr><td colspan='2'>[[1j4u]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Artocarpus_integer Artocarpus integer]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1J4U OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1J4U FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.9Å</td></tr> | ||
<tr id=' | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=AYA:N-ACETYLALANINE'>AYA</scene>, <scene name='pdbligand=MMA:O1-METHYL-MANNOSE'>MMA</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=1j4u FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1j4u OCA], [https://pdbe.org/1j4u PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1j4u RCSB], [https://www.ebi.ac.uk/pdbsum/1j4u PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1j4u ProSAT]</span></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | |||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/Q7M1T4_ARTIN Q7M1T4_ARTIN] | |||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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</StructureSection> | </StructureSection> | ||
[[Category: Artocarpus integer]] | [[Category: Artocarpus integer]] | ||
[[Category: Jeyaprakash | [[Category: Large Structures]] | ||
[[Category: Pratap | [[Category: Jeyaprakash AA]] | ||
[[Category: Rani | [[Category: Pratap JV]] | ||
[[Category: Sekar | [[Category: Rani PG]] | ||
[[Category: Surolia | [[Category: Sekar K]] | ||
[[Category: Vijayan | [[Category: Surolia A]] | ||
[[Category: Vijayan M]] | |||
Latest revision as of 02:42, 28 December 2023
Structure of Artocarpin Complexed with Me-alpha-MannoseStructure of Artocarpin Complexed with Me-alpha-Mannose
Structural highlights
FunctionEvolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe seeds of jack fruit (Artocarpus integrifolia) contain two tetrameric lectins, jacalin and artocarpin. Jacalin was the first lectin found to exhibit the beta-prism I fold, which is characteristic of the Moraceae plant lectin family. Jacalin contains two polypeptide chains produced by a post-translational proteolysis which has been shown to be crucial for generating its specificity for galactose. Artocarpin is a single chain protein with considerable sequence similarity with jacalin. It, however, exhibits many properties different from those of jacalin. In particular, it is specific to mannose. The structures of two crystal forms, form I and form II, of the native lectin have been determined at 2.4 and 2.5 A resolution, respectively. The structure of the lectin complexed with methyl-alpha-mannose, has also been determined at 2.9 A resolution. The structure is similar to jacalin, although differences exist in details. The crystal structures and detailed modelling studies indicate that the following differences between the carbohydrate binding sites of artocarpin and jacalin are responsible for the difference in the specificities of the two lectins. Firstly, artocarpin does not contain, unlike jacalin, an N terminus generated by post-translational proteolysis. Secondly, there is no aromatic residue in the binding site of artocarpin whereas there are four in that of jacalin. A comparison with similar lectins of known structures or sequences, suggests that, in general, stacking interactions with aromatic residues are important for the binding of galactose while such interactions are usually absent in the carbohydrate binding sites of mannose-specific lectins with the beta-prism I fold. Crystal structures of artocarpin, a Moraceae lectin with mannose specificity, and its complex with methyl-alpha-D-mannose: implications to the generation of carbohydrate specificity.,Pratap JV, Jeyaprakash AA, Rani PG, Sekar K, Surolia A, Vijayan M J Mol Biol. 2002 Mar 22;317(2):237-47. PMID:11902840[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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