For FY13, we have used multi-dimensional NMR, X-ray crystallography, site-directed mutagenesis coupled with isothermal titration calorimetry to study how nucleosomes and histones are recognized by other proteins. We have determined the crystal structure of the CENP-C-CENP-A nucleosome complex and found a conserved mechanism for recognition of the centromeric nucleosome by the kinetochore protein CENP-C. We have built a structure model for the H1-nucleosome complex with residue-level information, which shows a unique orientation of H1 in the H1-nucleosome complex. In addition, we have investigated how the centromere-specific histone is recognized by its chaperone. We found that the centromere histone in budding yeast (Sc and Kl) has a partially unfolded conformation that is specifically recognized by the chaperone Scm3. We also solve the structure of histone variant H2A.Z in complex with the N-terminal region of the Swr1 subunit of the SWR1 remoldeler. Our results show that Swr1 deliver the H2A.Z-H2B by a chaperone mechanism.

National Institute of Health (NIH)
National Cancer Institute (NCI)
Investigator-Initiated Intramural Research Projects (ZIA)
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National Cancer Institute Division of Basic Sciences
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Zhou, Bing-Rui; Jiang, Jiansheng; Feng, Hanqiao et al. (2015) Structural Mechanisms of Nucleosome Recognition by Linker Histones. Mol Cell 59:628-38
Hong, Jingjun; Feng, Hanqiao; Wang, Feng et al. (2014) The catalytic subunit of the SWR1 remodeler is a histone chaperone for the H2A.Z-H2B dimer. Mol Cell 53:498-505
Hong, Jingjun; Feng, Hanqiao; Zhou, Zheng et al. (2013) Identification of functionally conserved regions in the structure of the chaperone/CenH3/H4 complex. J Mol Biol 425:536-45
Kato, Hidenori; Jiang, Jiansheng; Zhou, Bing-Rui et al. (2013) A conserved mechanism for centromeric nucleosome recognition by centromere protein CENP-C. Science 340:1110-3
Chu, Xiakun; Wang, Yong; Gan, Linfeng et al. (2012) Importance of electrostatic interactions in the association of intrinsically disordered histone chaperone Chz1 and histone H2A.Z-H2B. PLoS Comput Biol 8:e1002608
Kato, Hidenori; van Ingen, Hugo; Zhou, Bing-Rui et al. (2011) Architecture of the high mobility group nucleosomal protein 2-nucleosome complex as revealed by methyl-based NMR. Proc Natl Acad Sci U S A 108:12283-8
Zhou, Zheng; Feng, Hanqiao; Zhou, Bing-Rui et al. (2011) Structural basis for recognition of centromere histone variant CenH3 by the chaperone Scm3. Nature 472:234-7