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. 2009 Aug 3;284(40):27480–27486. doi: 10.1074/jbc.M109.011312

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© 2009 by The American Society for Biochemistry and Molecular Biology, Inc.

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FIGURE 7. — Proposed model for phosphorylation-induced allostery. Modeled C-terminal conformations (gray) as an extension of the known Rap1a structure (green) highlight the polybasic region (cyan) and the position of the Ser¹⁷⁹ phosphorylation site (magenta). Putative electrostatic interactions between the polybasic region and the acidic residues Glu⁴⁵ and Asp⁴⁷ (red) and the role of the β2-β3 strands (orange) communicating to the switch loops (yellow) are shown. The figure was generated using PyMOL (38).