2enr
From Proteopedia
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|PDB= 2enr |SIZE=350|CAPTION= <scene name='initialview01'>2enr</scene>, resolution 2.35Å | |PDB= 2enr |SIZE=350|CAPTION= <scene name='initialview01'>2enr</scene>, resolution 2.35Å | ||
|SITE= <scene name='pdbsite=S1:Transition+Metal+Binding+Site+S1+6-Coordinated+Octahedra+...'>S1</scene> and <scene name='pdbsite=S2:Ca+Binding+Site+S2+7-Coordinated+Distorted+Octahedral+Co+...'>S2</scene> | |SITE= <scene name='pdbsite=S1:Transition+Metal+Binding+Site+S1+6-Coordinated+Octahedra+...'>S1</scene> and <scene name='pdbsite=S2:Ca+Binding+Site+S2+7-Coordinated+Distorted+Octahedral+Co+...'>S2</scene> | ||
| - | |LIGAND= <scene name='pdbligand=CD:CADMIUM ION'>CD</scene> | + | |LIGAND= <scene name='pdbligand=CD:CADMIUM+ION'>CD</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2enr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2enr OCA], [http://www.ebi.ac.uk/pdbsum/2enr PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2enr RCSB]</span> | ||
}} | }} | ||
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[[Category: Loris, R.]] | [[Category: Loris, R.]] | ||
[[Category: Wyns, L.]] | [[Category: Wyns, L.]] | ||
| - | [[Category: CD]] | ||
[[Category: cadmium]] | [[Category: cadmium]] | ||
[[Category: carbohydrate binding]] | [[Category: carbohydrate binding]] | ||
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[[Category: plant lectin]] | [[Category: plant lectin]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 02:51:32 2008'' |
Revision as of 23:51, 30 March 2008
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| , resolution 2.35Å | |||||||
|---|---|---|---|---|---|---|---|
| Sites: | and | ||||||
| Ligands: | |||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CO-CRYSTALS OF DEMETALLIZED CONCANAVALIN A WITH CADMIUM HAVING A CADMIUM ION BOUND IN BOTH THE S1 SITE AND THE S2 SITE
Overview
The crystal structures of cadmium/cadmium and zinc/calcium concanavalin A (con A) at pH 5.0 and pH 6.15, respectively, were determined. The structure of cadmium/cadmium con A confirms that the secondary Cd(2+)-binding site S3 is empty at pH 5. The metal-binding sites S1 and S2 are only very slightly affected by the substitution with cadmium. On the other hand, S1 and S2 and most of the protein surface of zinc/calcium con A at pH 6.15 differ from other fully metal-bound and carbohydrate-free structures. Most of these structural differences at the protein surface are a result of the interplay between metal binding, protonation and crystal packing. This interplay is expressed by relative rotations and translations of the con A units in alternative crystal packings and participation in space-group conversions inside crystals in situ. The particular crystal packing of zinc/calcium con A creates a novel zinc-binding site S4. The Zn(2+) ion in S4 ligates two aspartates from one tetramer and a histidine from a symmetry-related tetramer.
About this Structure
2ENR is a Single protein structure of sequence from Canavalia ensiformis. Full crystallographic information is available from OCA.
Reference
Zinc/calcium- and cadmium/cadmium-substituted concanavalin A: interplay of metal binding, pH and molecular packing., Bouckaert J, Loris R, Wyns L, Acta Crystallogr D Biol Crystallogr. 2000 Dec;56(Pt 12):1569-76. PMID:11092923
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