3por

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[[Image:3por.jpg|left|200px]]
[[Image:3por.jpg|left|200px]]
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{{Structure
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|PDB= 3por |SIZE=350|CAPTION= <scene name='initialview01'>3por</scene>, resolution 2.5&Aring;
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The line below this paragraph, containing "STRUCTURE_3por", creates the "Structure Box" on the page.
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|LIGAND= <scene name='pdbligand=C8E:(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE'>C8E</scene>, <scene name='pdbligand=TRS:2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>TRS</scene>
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{{STRUCTURE_3por| PDB=3por | SCENE= }}
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3por FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3por OCA], [http://www.ebi.ac.uk/pdbsum/3por PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=3por RCSB]</span>
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'''PORIN CONFORMATION IN THE ABSENCE OF CALCIUM; REFINED STRUCTURE AT 2.5 ANGSTROMS RESOLUTION'''
'''PORIN CONFORMATION IN THE ABSENCE OF CALCIUM; REFINED STRUCTURE AT 2.5 ANGSTROMS RESOLUTION'''
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[[Category: Schulz, G E.]]
[[Category: Schulz, G E.]]
[[Category: Weiss, M S.]]
[[Category: Weiss, M S.]]
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[[Category: integral membrane protein porin]]
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[[Category: Integral membrane protein porin]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 22:10:54 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 05:35:30 2008''
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Revision as of 19:10, 4 May 2008

Image:3por.jpg

Template:STRUCTURE 3por

PORIN CONFORMATION IN THE ABSENCE OF CALCIUM; REFINED STRUCTURE AT 2.5 ANGSTROMS RESOLUTION


Overview

The crystal structure of porin from Rhodobacter capsulatus in the absence of divalent calcium ions has been refined to convergence at a resolution of 2.5 A using the simulated annealing refinement method. The final model consists of all 301 amino acid residues, 77 solvent molecules, one tris(hydroxymethyl)-aminomethane molecule and one unknown ligand modeled as n-octyltetraoxyethylene. A superposition with the previously described model containing three calcium ions showed structural changes at the segment 108-116 of the inner loop beta 5-beta 6, and at loops beta 8-beta 9 and beta 11-beta 12 at the extracellular side of the porin molecule. Evidence is presented that the conformational changes depend on the presence or absence of calcium ions. A possible influence on porin function is discussed.

About this Structure

3POR is a Single protein structure of sequence from Rhodobacter capsulatus. Full crystallographic information is available from OCA.

Reference

Porin conformation in the absence of calcium. Refined structure at 2.5 A resolution., Weiss MS, Schulz GE, J Mol Biol. 1993 Jun 5;231(3):817-24. PMID:7685826 Page seeded by OCA on Sun May 4 22:10:54 2008

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