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- 저자 : Brian D. Sykes (검색결과 1 건)
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The High Resolution NMR Solution Structure of Monocyte Chemoattractant Protein-3
Kwon Do-Yoon,Lee Duck-Yeon,Sykes Brian D.,Kim Key-Sun Korean Magnetic Resonance Society 2005 Journal of the Korean Magnetic Resonance Society Vol.9 No.2
The high resolution solution structure of MCP-3 was determined using multinuclear, multidimensional NMR spectroscopy with an expressed and $^{13}C-\;and\;^{15}N-labeled$ protein. The MCP-3 has a typical chemokine fold including 3 anti-parallel $\beta-sheets$, and a C-terminal helix, but it exists as a monomer in solution under the conditions where the structure was determined (2 mM, pH 5.1 at $30^{\circ}C$). Based on the structure and the amino acid sequence compared to other chemokines we propose that Ile20 and Leu25 in MCP-3 play key roles in the formation of N-loop (residues between the $2^{nd}$ cysteine and the I sheet) which has been implicated as a determinant of chemokine specificity. Additional receptor binding surface is supplied by the 40s loop (residues between the 2 and the 3 sheet) and the binding interface of the acidic N-terminal region of chemokine receptor to MCP-3 would resemble the dimerization interface of CC type dimer.
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