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THE THREE-DIMENSIONAL STRUCTURE OF A HELIX-LESS VARIANT OF INTESTINAL FATTY ACID BINDING PROTEIN, NMR, 20 STRUCTURES
SOLUTION NMR
NMR Experiment
Experiment
Type
Sample Contents
Solvent
Ionic Strength
pH
Pressure
Temperature (K)
Spectrometer
1
3-D 13C-RESOLVED NOESY
7.2
298
2
3-D 15N-RESOLVED NOESY
7.2
298
3
2-D 1H-HOMONUCLEAR NOESY
7.2
298
4
2-D 13C-EDITED NOESY
7.2
298
NMR Spectrometer Information
Spectrometer
Manufacturer
Model
Field Strength
1
Varian
UNITY
500
NMR Refinement
Method
Details
Software
DISTANCE GEOMETRY WITH SIMULATED ANNEALING REFINEMENT
DISTANCE GEOMETRY WAS PERFORMED USING 5% PAIRWISE METRIZATION AND A GAUSSIAN TRIAL DISTRIBUTION FOR THE SELECTION OF DISTANCES USING THE PROGRAM DISTGEOM, A COMPONENT OF THE TINKER MOLECULAR MODELING PACKAGE. EMBEDDED STRUCTURES WERE REFINED VERSUS A PENALTY FUNCTION BASED SOLELY ON THE EXPERIMENTAL RESTRAINTS AND LOCAL COVALENT GEOMETRY (BOND LENGTHS, ANGLES, CHIRALITY); NO ENERGY-BASED TERMS WERE INCLUDED. DETAILS OF THE CALCULATIONS AND STRUCTURAL STATISTICS ARE GIVEN IN THE PAPER CITED ON THE JRNL RECORDS ABOVE.
THE LOOP FROM RESIDUES 8 - 20 IS ENTIRELY UNRESTRAINED.
THIS REGION CONTAINS THE SITE OF THE DELETED HELICES OF
I-FABP. CARE SHOULD BE TAKEN WHEN ANALYZING STATISTICS ON
THIS MOLECULE AS THIS UNRESTRAINED LOOP WILL ABNORMALLY
SKEW ANY RESULTS.
Tinker
NMR Ensemble Information
Conformer Selection Criteria
FINAL PENALTY FUNCTION VALUES GREATER THAN 10.0 OR GREATER THAN TWO STANDARD DEVIATIONS FROM THE MEAN WERE OMITTED