Heterotypic Sam-Sam association between Odin-Sam1 and Arap3-Sam: binding affinity and structural insights.
Heterotypic Sam-Sam association between Odin-Sam1 and Arap3-Sam: binding affinity and structural insights.
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DOI:
10.1002/cbic.201200592
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发表时间:
2013-01-02
期刊:
影响因子:
3.2
通讯作者:
Leone, Marilisa
中科院分区:
文献类型:
--
作者:
Mercurio, Flavia A.;Marasco, Daniela;Pirone, Luciano;Scognamiglio, Pasqualina L.;Pedone, Emilia M.;Pellecchia, Maurizio;Leone, Marilisa
关键词:
Arap3 is a phosphatidylinositol 3 kinase effector protein that plays a role as GTP-ase activator (GAP) for Arf6 and RhoA. Arap3 contains a sterile alpha motif (Sam) domain that presents high sequence homology with the Sam domain of the EphA2-receptor (EphA2-Sam); both Arap3-Sam and EphA2-Sam are able to associate with the Sam domain of the lipid phosphatase Ship2 (Ship2-Sam). Recently, we have reported on a novel interaction between the first Sam domain of Odin (Odin-Sam1), a protein belonging to the ANKS (ANKyrin repeat and Sam domain containing) family, and EphA2-Sam. In the current work we apply Nuclear Magnetic Resonance (NMR) spectroscopy, Surface Plasmon Resonance (SPR) and Isothermal Titration Calorimetry (ITC) to characterize the association between Arap3-Sam and Odin-Sam1. We show that these two Sam domains interact with low micromolar affinity. Moreover, by means of molecular docking techniques, supported by NMR data, we demonstrate that Odin-Sam1 and Arap3-Sam may bind with a topology that is common to several Sam-Sam complexes. The unveiled structural details form the basis for the design of potential peptide-antagonists, that could be used as chemical tools to investigate functional aspects related to heterotypic Arap3-Sam associations.
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DOI:
10.1186/1478-811x-6-7
发表时间:
2008-10-09
期刊:
Cell communication and signaling : CCS
影响因子:
--
作者:
Emaduddin M;Edelmann MJ;Kessler BM;Feller SM
通讯作者:
Feller SM
影响因子:
20.3
作者:
Gambardella, Laure;Anderson, Karen E.;Vermeren, Sonja
通讯作者:
Vermeren, Sonja
影响因子:
4
作者:
Krugmann, S;Andrews, S;Hawkins, PT
通讯作者:
Hawkins, PT
影响因子:
5.7
作者:
Lee, Hyeong J.;Hota, Prasanta K.;Buck, Matthias
通讯作者:
Buck, Matthias
影响因子:
2.7
作者:
Rich, RL;Myszka, DG
通讯作者:
Myszka, DG