1t3f: Difference between revisions
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'''THREE DIMENSIONAL STRUCTURE OF A HUMANIZED ANTI-IFN-GAMMA FAB (HuZAF) IN P21 21 21 SPACE GROUP''' | {{Structure | ||
|PDB= 1t3f |SIZE=350|CAPTION= <scene name='initialview01'>1t3f</scene>, resolution 2.00Å | |||
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'''THREE DIMENSIONAL STRUCTURE OF A HUMANIZED ANTI-IFN-GAMMA FAB (HuZAF) IN P21 21 21 SPACE GROUP''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1T3F is a [ | 1T3F is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1T3F OCA]. | ||
==Reference== | ==Reference== | ||
Three-dimensional structures of a humanized anti-IFN-gamma Fab (HuZAF) in two crystal forms., Bourne PC, Terzyan SS, Cloud G, Landolfi NF, Vasquez M, Edmundson AB, Acta Crystallogr D Biol Crystallogr. 2004 Oct;60(Pt 10):1761-9. Epub 2004, Sep 23. PMID:[http:// | Three-dimensional structures of a humanized anti-IFN-gamma Fab (HuZAF) in two crystal forms., Bourne PC, Terzyan SS, Cloud G, Landolfi NF, Vasquez M, Edmundson AB, Acta Crystallogr D Biol Crystallogr. 2004 Oct;60(Pt 10):1761-9. Epub 2004, Sep 23. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15388922 15388922] | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Protein complex]] | [[Category: Protein complex]] | ||
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[[Category: x-ray structure]] | [[Category: x-ray structure]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 14:13:14 2008'' | ||
Revision as of 15:13, 20 March 2008
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THREE DIMENSIONAL STRUCTURE OF A HUMANIZED ANTI-IFN-GAMMA FAB (HuZAF) IN P21 21 21 SPACE GROUP
OverviewOverview
Three-dimensional structures were determined for two crystal forms (orthorhombic P2(1)2(1)2(1) and monoclinic C2) of the Fab from the humanized version of a murine monoclonal antibody (AF2) that possesses binding and potent neutralizing activity against human interferon gamma (IFN-gamma). This humanized antibody (HuZAF; USAN name fontolizumab) is currently in phase II clinical trials for the treatment of Crohn's disease. HuZAF exhibits binding and IFN-gamma neutralizing capacities that closely approximate those of the original antibody. It is shown that HuZAF, whose VH domain was designed using a best-sequence-fit approach, is closer structurally to its mouse precursor than is a version whose VH was constructed using a human sequence with lower homology to the original mouse sequence. This work thus offers direct structural evidence in support of the best-sequence-fit approach and adds to previous results of biological and biochemical evaluations of distinctly engineered antibodies that also favored the use of a best-sequence-fit strategy. A second crystal type appeared during attempts to crystallize the Fab-IFN-gamma complex. The antibody-antigen complex that existed in solution dissociated in the crystallization mixture. A conformationally altered but unliganded HuZAF protein crystallized in a different space group (C2), with two Fab molecules in the asymmetric unit. In this crystal lattice, no space was available for accommodating the IFN-gamma antigen. Thus, there are currently three slightly different structures of the HuZAF Fab.
About this StructureAbout this Structure
1T3F is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.
ReferenceReference
Three-dimensional structures of a humanized anti-IFN-gamma Fab (HuZAF) in two crystal forms., Bourne PC, Terzyan SS, Cloud G, Landolfi NF, Vasquez M, Edmundson AB, Acta Crystallogr D Biol Crystallogr. 2004 Oct;60(Pt 10):1761-9. Epub 2004, Sep 23. PMID:15388922
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