1mim: Difference between revisions
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|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
|DOMAIN= | |||
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1mim FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mim OCA], [http://www.ebi.ac.uk/pdbsum/1mim PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1mim RCSB]</span> | |||
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==Overview== | ==Overview== | ||
A specific drug targeted to the IL-2 receptor on activated T lymphocytes could limit acute immunological rejection during organ transplantation. A high-affinity monoclonal antibody directed against the alpha-chain of the IL-2 receptor (CD25) was chimerized with the constant regions of the human IgG1 heavy and k light chain resulting in SDZ CHII621 [Amlot, Rawlings, Fernando, Griffin, Heinrich, Schreier, Castaigne, Moore & Sweny (1995). Transplantation, 60, 748-756]. The Fab fragment of SDZ CHI621 has been purified and crystallized (P2(l), a = 39.58, b = 59.76, c = 102.09 A, beta = 99.98 degrees ). Its structure has been determined by molecular replacement and refined at 2.6 A to a crystallographic R factor of 19.7%. The protein exhibits the typical immunoglobulin fold. The complementary determining regions (CDR's) 1 and 2 of both heavy and light chains show similar conformations to other known reported structures whereas the CDR3 from the light chain seems to adopt a novel type of conformation. There is a network of interactions which maintain the CDR3 of both chains together and limit their solvent accessibility. The interaction between V(L) and C(L) has been strengthened by the chimerization whereas that between V(H) and C(H)1 has been weakened. | A specific drug targeted to the IL-2 receptor on activated T lymphocytes could limit acute immunological rejection during organ transplantation. A high-affinity monoclonal antibody directed against the alpha-chain of the IL-2 receptor (CD25) was chimerized with the constant regions of the human IgG1 heavy and k light chain resulting in SDZ CHII621 [Amlot, Rawlings, Fernando, Griffin, Heinrich, Schreier, Castaigne, Moore & Sweny (1995). Transplantation, 60, 748-756]. The Fab fragment of SDZ CHI621 has been purified and crystallized (P2(l), a = 39.58, b = 59.76, c = 102.09 A, beta = 99.98 degrees ). Its structure has been determined by molecular replacement and refined at 2.6 A to a crystallographic R factor of 19.7%. The protein exhibits the typical immunoglobulin fold. The complementary determining regions (CDR's) 1 and 2 of both heavy and light chains show similar conformations to other known reported structures whereas the CDR3 from the light chain seems to adopt a novel type of conformation. There is a network of interactions which maintain the CDR3 of both chains together and limit their solvent accessibility. The interaction between V(L) and C(L) has been strengthened by the chimerization whereas that between V(H) and C(H)1 has been weakened. | ||
==About this Structure== | ==About this Structure== | ||
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[[Category: immunoglobulin]] | [[Category: immunoglobulin]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 22:16:30 2008'' | ||
