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THE STRUCTURES WERE CALCULATED USING THE SIMULATED ANNEALING PROTOCOL OF
NILGES ET AL. (1988) FEBS LETT. 229, 129-136, USING THE PROGRAM XPLOR 3.1 (
BRUNGER) MODIFIED TO INCORPORATE DIPOLAR COUPLING RESTRAINTS (UNPUBLISHED).
THE 3D STRUCTURE OF THE C-TERMINAL G26R MUTANT KH DOMAIN OF HNRNP K WAS SOLVED
BY MULTI-DIMENSIONAL HETERONUCLEAR-EDITED AND -FILTERED NMR. IT IS BASED ON
1567 EXPERIMENTAL RESTRAINTS: 448 INTRARESIDUE, 322 SEQUENTIAL (|I-J|=1), 198
MEDIUM RANGE (1 < |I-J| >=5) AND 279 LONG RANGE (|I-J| >5) DISTANCE RESTRAINTS;
55 DISTANCE RESTRAINTS FOR 28 HYDROGEN BONDS; 49 DNH, 59 DCH, 48 DC'N, AND 53
DCAC' DIPOLAR COUPLING RESTRAINTS; 56 PHI-ANGLE RESTRAINTS FROM HN-HA COUPLING
CONSTANTS. THE 20 STRUCTURES ARE ARRANGED IN ORDER OF INCREASING OVERALL
ENERGY WITH MODEL 1 THE LOWEST. MODEL 9 HAS THE SMALLEST BACKBONE PAIRWISE RMS
TO THE AVERAGE STRUCTURE.