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3cxd

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Revision as of 13:16, 7 November 2018

Crystal structure of anti-osteopontin antibody 23C3 in complex with its epitope peptide

Structural highlights

3cxd is a 3 chain structure with sequence from Mus musculus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, ,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[OSTP_HUMAN] Binds tightly to hydroxyapatite. Appears to form an integral part of the mineralized matrix. Probably important to cell-matrix interaction. Acts as a cytokine involved in enhancing production of interferon-gamma and interleukin-12 and reducing production of interleukin-10 and is essential in the pathway that leads to type I immunity (By similarity).

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

Osteopontin plays an important role in the development and perpetuation of rheumatoid arthritis (RA). Antibodies targeting osteopontin have shown promising therapeutic benefits against this disease. We have previously reported a novel anti-RA monoclonal antibody, namely, 23C3, and shown it capable of alleviating the symptoms of RA in a murine collagen-induced arthritis model, restoring the cytokine production profile in joint tissues, and reducing T-cell recall responses to collagen type II. We describe here the crystal structure of 23C3 in complex with its epitope peptide. Analyses of the complex structure reveal the molecular mechanism of osteopontin recognition by 23C3. The peptide folds into two tandem beta-turns, and two key residues of the peptide are identified to be critical for the recognition by 23C3: TrpP43 is deeply embedded into a hydrophobic pocket formed by AlaL34, TyrL36, LeuL46, TyrL49, PheL91, and MetH102 and therefore has extensive hydrophobic interactions with 23C3, while AspP47 has a network of hydrophilic interactions with residues ArgH50, ArgH52, SerH53, and AsnH56 of the antibody. Besides the complementarity-determining region loops, the framework region L2 of 23C3 is also shown to interact with the epitope peptide, which is not common in the antibody-antigen interactions and thus could be exploited in the engineering of 23C3. These results not only provide valuable information for further improvement of 23C3 such as chimerization or humanization for its therapeutic application, but also reveal the features of this specific epitope of osteopontin that may be useful for the development of new antibody drugs against RA.

Molecular basis of recognition of human osteopontin by 23C3, a potential therapeutic antibody for treatment of rheumatoid arthritis.,Du J, Hou S, Zhong C, Lai Z, Yang H, Dai J, Zhang D, Wang H, Guo Y, Ding J J Mol Biol. 2008 Oct 17;382(4):835-42. Epub 2008 Jul 31. PMID:18694758^[1]

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

References

↑ Du J, Hou S, Zhong C, Lai Z, Yang H, Dai J, Zhang D, Wang H, Guo Y, Ding J. Molecular basis of recognition of human osteopontin by 23C3, a potential therapeutic antibody for treatment of rheumatoid arthritis. J Mol Biol. 2008 Oct 17;382(4):835-42. Epub 2008 Jul 31. PMID:18694758 doi:10.1016/j.jmb.2008.07.075

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3cxd"

@@ Line 1: / Line 1: @@
 ==Crystal structure of anti-osteopontin antibody 23C3 in complex with its epitope peptide==
 <StructureSection load='3cxd' size='340' side='right' caption='[[3cxd]], [[Resolution|resolution]] 2.80&Aring;' scene=''>
@@ Line 4: / Line 5: @@
 <table><tr><td colspan='2'>[[3cxd]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3CXD OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3CXD FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></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=3cxd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3cxd OCA], [http://pdbe.org/3cxd PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3cxd RCSB], [http://www.ebi.ac.uk/pdbsum/3cxd 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=3cxd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3cxd OCA], [http://pdbe.org/3cxd PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3cxd RCSB], [http://www.ebi.ac.uk/pdbsum/3cxd PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3cxd ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 12: / Line 13: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/cx/3cxd_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/cx/3cxd_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 29: / Line 30: @@
 ==See Also==
-*[[Antibody|Antibody]]
+*[[Antibody 3D structures|Antibody 3D structures]]
 == References ==
 <references/>

3cxd

From Proteopedia

Revision as of 13:16, 7 November 2018

Crystal structure of anti-osteopontin antibody 23C3 in complex with its epitope peptide

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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