Volume 8, Issue 10, Pages (October 2000)

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Volume 8, Issue 10, Pages 1069-1077 (October 2000) Mutual Conformational Adaptations in Antigen and Antibody upon Complex Formation between an Fab and HIV-1 Capsid Protein p24 Stéphanie Monaco-Malbet, Carmen Berthet-Colominas, Armelle Novelli, Nicole Battaı̈, Nadia Piga, Valérie Cheynet, François Mallet, Stephen Cusack Structure Volume 8, Issue 10, Pages 1069-1077 (October 2000) DOI: 10.1016/S0969-2126(00)00507-4

Figure 1 Amino Acid Sequences of the Heavy and Light Chains of Fab13B5 The CDRs, according to Kabat's [20], are surrounded with rectangles. Nucleotides corresponding to the last four residues of the light chain (in italics) were not sequenced due to choice of primer and are assumed to be RNEC as in other light chains. Electron density for Arg-209 and Asn-210 are observed in the crystal structure Structure 2000 8, 1069-1077DOI: (10.1016/S0969-2126(00)00507-4)

Figure 2 Stereographic Ribbon Representation of the Fab13B5-p24 Complex p24 is colored in blue, with H10 and H11 taking part of the interaction with the Fab and depicted, respectively, in magenta and green. The light chain of the Fab13B5 is colored in cyan while its heavy chain is in yellow Structure 2000 8, 1069-1077DOI: (10.1016/S0969-2126(00)00507-4)

Figure 3 Solid and Transparent Surface Representations of the Complex Fab-p24 The p24 molecule is translated away from the interaction surface to allow a clearer view of the binding interface Structure 2000 8, 1069-1077DOI: (10.1016/S0969-2126(00)00507-4)

Figure 4 (a) Stereographic Representation of the Variable Domains of the Fab Bound to the p24 Epitope (a and b) Two views at 90 degrees. The CDRs of the Fab involved in the binding are colored red and labeled H1, H2, H3, and L3 for CDR-H1, CDR-H2, CDR-H3, and CDR-L3. (c) As (b) but with full side chains of the amino acids involved in hydrogen bonds and some residues involved in van der Waals contacts between Fab and p24 shown. Some regions of the light chain have been truncated for clarity Structure 2000 8, 1069-1077DOI: (10.1016/S0969-2126(00)00507-4)

Figure 5 Superposition of the Free and Complexed Structures of the Fab13B5 via Their VL Domains The free Fab13B5 is colored in yellow (VH) and in cyan (VL), while the bound Fab complexed to the C-terminal domain of the antigen is colored in red. (a) and (b) are two views of the structure differing by a rotation of 90 degrees Structure 2000 8, 1069-1077DOI: (10.1016/S0969-2126(00)00507-4)

Figure 6 Adaptation of the p24 Epitope upon Fab Binding The C-terminal domain of p24 in the epitope region (H10-turn-H11) as in the Fab complex (red) is superposed on the isolated C-terminal domain of p24 (green; Protein Data Bank entry 1AM3, [19]), showing conformational differences at Pro-207 Structure 2000 8, 1069-1077DOI: (10.1016/S0969-2126(00)00507-4)