Structure of FGFR3 transmembrane domain dimer: implications for signaling and human pathologies.
Structure of FGFR3 transmembrane domain dimer: implications for signaling and human pathologies.
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DOI:
10.1016/j.str.2013.08.026
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发表时间:
2013-11-05
期刊:
影响因子:
5.7
通讯作者:
Arseniev, Alexander S.
中科院分区:
文献类型:
--
作者:
Bocharov, Eduard V.;Lesovoy, Dmitry M.;Goncharuk, Sergey A.;Goncharuk, Marina V.;Hristova, Kalina;Arseniev, Alexander S.
Fibroblast growth factor receptor 3 (FGFR3) transduces biochemical signals via lateral dimerization in the plasma membrane, and plays an important role in human development and disease. At least 8 different pathogenic mutations, implicated in cancers and growth disorders, have been identified in FGFR3 transmembrane segment. Here we use heteronuclear NMR spectroscopy to determine the dimeric structure of FGFR3 transmembrane domain in membrane-mimicking DPC/SDS (9/1) micelles. In the structure, the two transmembrane helices pack into a symmetric left-handed dimer, with intermolecular stacking interactions occurring in the dimer central region. Some pathogenic mutations fall within the helix-helix interface, while others are located within a putative alternative interface. This implies that while the observed dimer structure is important for FGFR3 signaling, the mechanism of FGFR3-mediated transduction across the plasma membrane is complex. We propose a FGFR3 signaling mechanism that is based on the solved structure, available structures of isolated soluble FGFR domains, and published biochemical and biophysical data.
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