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Bapineuzumab captures the N-terminus of the Alzheimer's disease amyloid-beta peptide in a helical conformation.

ABSTRACT: Bapineuzumab is a humanized antibody developed by Pfizer and Johnson & Johnson targeting the amyloid (A?) plaques that underlie Alzheimer's disease neuropathology. Here we report the crystal structure of a Fab-A? peptide complex that reveals Bapineuzumab surprisingly captures A? in a monomeric helical conformation at the N-terminus. Microscale thermophoresis suggests that the Fab binds soluble A?(1-40) with a K(D) of 89 (±9) nM. The structure explains the antibody's exquisite selectivity for particular A? species and why it cannot recognize N-terminally modified or truncated A? peptides.

SUBMITTER: Miles LA 

PROVIDER: S-EPMC3575012 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature

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Bapineuzumab captures the N-terminus of the Alzheimer's disease amyloid-beta peptide in a helical conformation.

Miles Luke A LA   Crespi Gabriela A N GA   Doughty Larissa L   Parker Michael W MW  

Scientific reports 20130101

Bapineuzumab is a humanized antibody developed by Pfizer and Johnson & Johnson targeting the amyloid (Aβ) plaques that underlie Alzheimer's disease neuropathology. Here we report the crystal structure of a Fab-Aβ peptide complex that reveals Bapineuzumab surprisingly captures Aβ in a monomeric helical conformation at the N-terminus. Microscale thermophoresis suggests that the Fab binds soluble Aβ(1-40) with a K(D) of 89 (±9) nM. The structure explains the antibody's exquisite selectivity for par  ...[more]

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