Abstract
The Bcr-Abl oncoprotein is responsible for a wide range of human leukemias, including most cases of Philadelphia chromosome-positive chronic myelogenous leukemia. Oligomerization of Bcr-Abl is essential for oncogenicity. We determined the crystal structure of the N-terminal oligomerization domain of Bcr-Abl (residues 1–72 or Bcr1–72) and found a novel mode of oligomer formation. Two N-shaped monomers dimerize by swap** N-terminal helices and by forming an antiparallel coiled coil between C-terminal helices. Two dimers then stack onto each other to form a tetramer. The Bcr1–72 structure provides a basis for the design of inhibitors of Bcr-Abl transforming activity by disrupting Bcr-Abl oligomerization.
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Acknowledgements
We thank J. Pang and C. Kitidis for technical assistance; L. Gaffney for assistance in preparation of the manuscript; B. Chen, S. Johnston, A. Keating, C. Liu, J. Marszalek, J. Newman, R. Ren and M. Root for comments on manuscript; and C. Ogata for assistance at the Howard Hughes Medical Institute beamline (X4A) at the National Synchrotron Light Source (Brookhaven National Laboratory, Upton, NY). This research was funded by the National Institutes of Health and National Science Foundation, and utilized the W. M. Keck Foundation X-ray Crystallography Facility (Whitehead Institute, Cambridge, MA). X.Z. was supported by an Anna Fuller fellowship, and S.G. was supported by a Clinician Scientist Award from the NIH.
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Zhao, X., Ghaffari, S., Lodish, H. et al. Structure of the Bcr-Abl oncoprotein oligomerization domain. Nat Struct Mol Biol 9, 117–120 (2002). https://doi.org/10.1038/nsb747
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DOI: https://doi.org/10.1038/nsb747
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