@article {2120,
	title = {Identification and structural characterization of a CBP/p300-binding domain from the ETS family transcription factor GABP alpha},
	journal = {Journal of Molecular Biology},
	volume = {377},
	number = {3},
	year = {2008},
	note = {ISI Document Delivery No.: 293ZPTimes Cited: 5Cited Reference Count: 60Kang, Hyun-Seo Nelson, Mary L. Mackereth, Cameron D. Scharpf, Manuela Graves, Barbara J. McIntosh, Lawrence P.},
	month = {Mar},
	pages = {636-646},
	type = {Article},
	abstract = {Using NMR spectroscopy, we identified and characterized a previously unrecognized structured domain near the N-terminus (residues 35-121) of the ETS family transcription factor GABP alpha. The monomeric domain folds as a five-stranded beta-sheet crossed by a distorted helix. Although globally resembling ubiquitin, the GABP(x fragment differs in its secondary structure topology and thus appears to represent a new protein fold that we term the OST (On-SighT) domain. The surface of the GABP alpha OST domain contains two predominant clusters of negatively-charged residues suggestive of electrostatically driven interactions with positively-charged partner proteins. Following a best-candidate approach to identify such a partner, we demonstrated through NMR-monitored titrations and glutathione S-transferase pulldown assays that the OST domain binds to the CH1 and CH3 domains of the co-activator histone acetyltransferase CBP/p300. This provides a direct structural link between GABP and a central component of the transcriptional machinery. (C) 2008 Elsevier Ltd. All rights reserved.},
	keywords = {BACKBONE DYNAMICS, C-13-LABELED PROTEINS, CREB-BINDING-PROTEIN, ESCHERICHIA-COLI, HIGH-RESOLUTION, HYPOXIA-INDUCIBLE FACTOR-1-ALPHA, LARGER PROTEINS, NEUROMUSCULAR-JUNCTION, NMR, NMR EXPERIMENTS, protein-protein interaction, RESIDUAL DIPOLAR COUPLINGS, SPECTROSCOPY, TRANSCRIPTION FACTOR, UBIQUITIN},
	isbn = {0022-2836},
	url = {<Go to ISI>://000255374200006},
	author = {Kang, H. S. and Nelson, M. L. and Mackereth, C. D. and Scharpf, M. and Graves, B. J. and McIntosh, L. P.}
}
@article {2035,
	title = {Protein-protein interaction regulates proteins{\textquoteright} mechanical stability},
	journal = {Journal of Molecular Biology},
	volume = {378},
	number = {5},
	year = {2008},
	note = {ISI Document Delivery No.: 305IOTimes Cited: 10Cited Reference Count: 38Cao, Yi Yoo, Teri Zhuang, Shulin Li, Hongbin},
	month = {May},
	pages = {1132-1141},
	type = {Article},
	abstract = {Elastomeric proteins are molecular springs found not only in a variety of biological machines and tissues, but also in biomaterials of superb mechanical properties. Regulating the mechanical stability of elastomeric proteins is not only important for a range of biological processes, but also critical for the use of engineered elastomeric proteins as building blocks to construct nanomechanical devices and novel materials of well-defined mechanical properties. Here we demonstrate that protein-protein interactions can potentially serve as an effective means to regulate the mechanical properties of elastomeric proteins. We show that the binding of fragments of IgG antibody to a small protein, GB1, can significantly enhance the mechanical stability of GB1. The regulation of the mechanical stability of GB1 by IgG fragments is not through direct modification of the interactions in the mechanically key region of GB1; instead, it is accomplished via the long-range coupling between the IgG binding site and the mechanically key region of GB1. Although Fc and Fab bind GB1 at different regions of GB1, their binding to GB1 can increase the mechanical stability of GB1 significantly. Using alanine point mutants of GB1, we show that the amplitude of mechanical stability enhancement of GB1 by Fc does not correlate with the binding affinity, suggesting that binding affinity only affects the population of GB1/human Fc (hFc) complex at a given concentration of hFc, but does not affect the intrinsic mechanical stability of the GB1/hFc complex. Furthermore, our results indicate that the mechanical stability enhancement by IgG fragments is robust and can tolerate sequence/structural perturbation to GB1. Our results demonstrate that the protein-protein interaction is an efficient approach to regulate the mechanical stability of GB1-like proteins and we anticipate that this new methodology will help to develop novel elastomeric proteins with tunable mechanical stability and compliance. (C) 2008 Elsevier Ltd. All rights reserved.},
	keywords = {BINDING, BIOLOGICAL ROLES, CRYSTAL-STRUCTURE, DIHYDROFOLATE-REDUCTASE, DOMAIN, ENGINEERING PROTEINS, FORCE SPECTROSCOPY, FRAGMENT, HUMAN-IGG, MECHANICAL STABILITY, mechanical unfolding, MOLECULAR ELASTICITY, protein-protein interaction, single molecule atomic force microscopy, STABILIZATION},
	isbn = {0022-2836},
	url = {<Go to ISI>://000256171900015},
	author = {Cao, Y. and Yoo, T. and Zhuang, S. L. and Li, H. B.}
}
