4tgf
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(New page: 200px<br /> <applet load="4tgf" size="450" color="white" frame="true" align="right" spinBox="true" caption="4tgf" /> '''SOLUTION STRUCTURES OF HUMAN TRANSFORMING G...)
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Revision as of 21:44, 12 November 2007
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SOLUTION STRUCTURES OF HUMAN TRANSFORMING GROWTH FACTOR ALPHA DERIVED FROM 1*H NMR DATA
Overview
The 600-MHz 1H NMR spectrum of the des-Val-Val mutant of human, transforming growth factor alpha (TGF-alpha) was reassigned at pH = 6.3., The conformation space of des-Val-Val TGF-alpha was explored by distance, geometry embedding followed by restrained molecular dynamics refinement, using NOE distance constraints and some torsion angle constraints derived, from J-couplings. Over 80 long-range NOE constraints were found by, completely assigning all resolved cross-peaks in the NOESY spectra. Low, NOE constraint violations were observed in structures obtained with the, following three different refinement procedures: interactive annealing in, DSPACE, AMBER 3.0 restrained molecular dynamics, and dynamic simulated, annealing in XPLOR. The segment from Phe15 to Asp47 was found to be, conformationally well-defined. Back-calculations of NOESY spectra were, used to evaluate the quality of the structures. Our calculated structures, resemble the ribbon diagram presentations that were recently reported by, other groups. Several side-chain conformations appear to be well-defined, as does the relative orientation of the C loop to the N-terminal half of, the protein.
About this Structure
4TGF is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Solution structures of human transforming growth factor alpha derived from 1H NMR data., Kline TP, Brown FK, Brown SC, Jeffs PW, Kopple KD, Mueller L, Biochemistry. 1990 Aug 28;29(34):7805-13. PMID:2261437
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