1ce1 | pdb_00001ce1

1.9A STRUCTURE OF THE THERAPEUTIC ANTIBODY CAMPATH-1H FAB IN COMPLEX WITH A SYNTHETIC PEPTIDE ANTIGEN

spinqualitylabelsall models 1ce1, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1ce1 is a 3 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT 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 CAMPATH-1 antibodies have a long and successful history in the treatment of leukaemia, autoimmune disease and transplant rejection. The first antibody to undergo "humanisation", CAMPATH-1H, permits treatment with limited patient anti-globulin response. It recognises the CD52 antigen which is a small glycosylphosphatidylinositol(GPI)-anchored protein expressed on lymphocytes and mediates cell depletion. We present the 1.9 A structure of the CAMPATH-1H Fab complexed [corrected] with an analogue of the antigenic determinant of CD52. Analysis of the CAMPATH-1H binding site reveals that in contrast to most antibodies CDR L3 plays a dominant role in antigen binding. Furthermore CDR H3, which is essential for effective antigen recognition in most antibodies, participates in only two main-chain interactions in CAMPATH-1H. The CAMPATH-1H binding site is highly basic; ionic interaction with the enthanolamine phosphate of the CD52 GPI anchor has long been hypothesised to be important in antigen binding. The structure reveals a number of important specific ionic interactions, including Lys53H but not Lys52bH as had previously been suggested. Prolonged treatment with CAMPATH-1H can lead to patient anti-idiotype responses which may be exacerbated by the unusually high number of basic residues in the antibody. This suggests that a strategy where redundant basic residues are replaced with neutral counterparts may be effective in further reducing the immunogenicity of this versatile and widely used antibody. 1.9 A structure of the therapeutic antibody CAMPATH-1H fab in complex with a synthetic peptide antigen.,James LC, Hale G, Waldmann H, Bloomer AC J Mol Biol. 1999 Jun 4;289(2):293-301. PMID:10366506 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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