2omb
From Proteopedia
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[[Image:2omb.jpg|left|200px]] | [[Image:2omb.jpg|left|200px]] | ||
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'''Bence Jones KWR Protein- Immunoglobulin Light Chain Dimer, P3(1)21 Crystal Form''' | '''Bence Jones KWR Protein- Immunoglobulin Light Chain Dimer, P3(1)21 Crystal Form''' | ||
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==About this Structure== | ==About this Structure== | ||
| - | + | Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2OMB OCA]. | |
==Reference== | ==Reference== | ||
Bence Jones KWR protein structures determined by X-ray crystallography., Makino DL, Henschen-Edman AH, Larson SB, McPherson A, Acta Crystallogr D Biol Crystallogr. 2007 Jul;63(Pt 7):780-92. Epub 2007, Jun 15. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17582169 17582169] | Bence Jones KWR protein structures determined by X-ray crystallography., Makino DL, Henschen-Edman AH, Larson SB, McPherson A, Acta Crystallogr D Biol Crystallogr. 2007 Jul;63(Pt 7):780-92. Epub 2007, Jun 15. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17582169 17582169] | ||
| - | [[Category: Homo sapiens]] | ||
| - | [[Category: Protein complex]] | ||
[[Category: Larson, S B.]] | [[Category: Larson, S B.]] | ||
[[Category: Makino, D L.]] | [[Category: Makino, D L.]] | ||
[[Category: McPherson, A.]] | [[Category: McPherson, A.]] | ||
| - | [[Category: | + | [[Category: Immunoglobulin light chain]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 11:12:25 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 08:12, 4 May 2008
Bence Jones KWR Protein- Immunoglobulin Light Chain Dimer, P3(1)21 Crystal Form
Overview
A Bence Jones protein isolated in the early 1960s from a patient (initials KWR) suffering from plasma-cell dyscrasia was crystallized and its structure was analyzed in four different unit cells by X-ray diffraction. The final models of the molecule in all crystal forms were virtually the same, although the elbow angles relating the constant and variable domains of the Bence Jones dimers varied over a range of 10 degrees. The tetragonal form had an R factor of 22.6% and an R(free) of 28.3% at 2.2 A resolution. Phosphate or sulfate ions (depending on the crystallization conditions) were found in the antigen-combining sites in all crystals, as well as an unidentified ligand tightly bound in the hydrophobic 'deep pocket' beneath the antigen-binding site. The ligand was treated as a phenol molecule. Two trigonal crystal forms were among those solved. One was grown at pH 4.0 and the other was only obtained after sitting for more than eight months at room temperature. The latter crystal was composed of molecules that were degraded in their constant domains. Both low pH and proteolytic degradation of constant domains are known to promote the polymerization of some Bence Jones proteins into amyloid fibrils. Indeed, in both trigonal crystal forms the molecules are organized with pseudo-hexagonal symmetry about the unique crystallographic axes in a manner suggestive of such fibrils. The arrangement of Bence Jones dimers is also consistent with other observations regarding Bence Jones amyloid-fibril structure and current models.
About this Structure
Full crystallographic information is available from OCA.
Reference
Bence Jones KWR protein structures determined by X-ray crystallography., Makino DL, Henschen-Edman AH, Larson SB, McPherson A, Acta Crystallogr D Biol Crystallogr. 2007 Jul;63(Pt 7):780-92. Epub 2007, Jun 15. PMID:17582169 Page seeded by OCA on Sun May 4 11:12:25 2008
