NMR Restraints Grid |
Result table
image | mrblock_id | pdb_id | cing | stage | position | type |
17135 | 2bbm | cing | 1-original | 1 | comment |
A. NOE interproton distance restraints The restraints are represented by square-well potentials with the upper (u) and lower (l) limits given by u=i+k and l=i-j where the numbers are entered in the order i,j,k. [Clore et al. (1986) EMBO J. 5, 2729-2735] The NOEs are classified into three distance ranges corresponding to strong, medium and weak NOEs. These are 1.8-2.7 A, 1.8-3.3 A and 1.8-5.0 A, respectively. Appropriate corrections to the upper limits for distances involving methyl, methylene and Tyr and Phe aromatic ring protons, to account for centre averaging, are carried out as described by Wuthrich et al. [J. Mol. Biol. 169, 949-961 (1983)]. In addition, an extra 0.5 A is added to the upper limits of distances involving methyl protons [Clore et al. (1983) Biochemistry 26, 8012-8023; Wagner et al. (1987) J. Mol. Biol. 196, 611-640]. The atom notation follows standard PDB format. The # indicates a single wild card, and the * a full wild card. e.g. For Leu, HD* representes all the methyl protons; for a normal methylene beta proton, HB# represents the two protons. In these cases, the distances are calculated as centreaverages. Note that the hard sphere van der Waals repulsion term ensures that the minimum lower limit for all distances is the sum of the relevant hard sphere atom radii.
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