4pp2 | pdb_00004pp2

The crystal structure of Der p 1 allergen complexed with Fab fragment of mAb 10B9

spinqualitylabelsall models 4pp2, resolution 2.74Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4pp2 is a 6 chain structure with sequence from [1] and Dermatophagoides pteronyssinus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CA, NAG Related: 3rvw, 3rvv, 3rvx, 4poz, 4pp1 Activity: Peptidase 1 (mite), with EC number 3.4.22.65 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [PEPT1_DERPT] Thiol protease, with a preference for substrates with a large hydrophobic side chain in the P2 position, or with basic residues. Publication Abstract from PubMed Der p 1 is a major allergen from the house dust mite, Dermatophagoides pteronyssinus, that belongs to the papain-like cysteine protease family. To investigate the antigenic determinants of Der p 1, we determined two crystal structures of Der p 1 in complex with the Fab fragments of mAbs 5H8 or 10B9. Epitopes for these two Der p 1-specific Abs are located in different, nonoverlapping parts of the Der p 1 molecule. Nevertheless, surface area and identity of the amino acid residues involved in hydrogen bonds between allergen and Ab are similar. The epitope for mAb 10B9 only showed a partial overlap with the previously reported epitope for mAb 4C1, a cross-reactive mAb that binds Der p 1 and its homolog Der f 1 from Dermatophagoides farinae. Upon binding to Der p 1, the Fab fragment of mAb 10B9 was found to form a very rare alpha helix in its third CDR of the H chain. To provide an overview of the surface properties of the interfaces formed by the complexes of Der p 1-10B9 and Der p 1-5H8, along with the complexes of 4C1 with Der p 1 and Der f 1, a broad analysis of the surfaces and hydrogen bonds of all complexes of Fab-protein or Fab-peptide was performed. This work provides detailed insight into the cross-reactive and specific allergen-Ab interactions in group 1 mite allergens. The surface data of Fab-protein and Fab-peptide interfaces can be used in the design of conformational epitopes with reduced Ab binding for immunotherapy. Structural Analysis of Der p 1-Antibody Complexes and Comparison with Complexes of Proteins or Peptides with Monoclonal Antibodies.,Osinski T, Pomes A, Majorek KA, Glesner J, Offermann LR, Vailes LD, Chapman MD, Minor W, Chruszcz M J Immunol. 2015 Jul 1;195(1):307-16. doi: 10.4049/jimmunol.1402199. Epub 2015 May, 29. PMID:26026055 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also 3D structures of antibody

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