Abstract:
Mechanochemical understanding of F1-ATPase has been required for nano-device
machinery in medicine. The relationship between thermodynamics and geometry deformation
of the crystals has been investigated by means of computer simulations using
information from the Protein Data Bank (PDB). In fact, many experiments have been
done based on molecular graphic programs. The goal of this study is to establish a computer-
aided system to manipulate F1-ATPase rotation. In this thesis, Coordinates Manipulation
Toolboxes for MATLAB had been developed that can classify and extract
coordinates of an interesting region. The execution composes of three basic procedures:
1) Molecule Characteristics Extraction, 2) Spherical Boundary Partition, and 3) Walker-
Motif-A Identification. The toolboxes will provide products used in further computations.
The first toolbox reveals PDB Id, number of chains, Residue Numbers and Residue
Names, and available Mg2+ ions and -phosphates. A circular region around the -
phosphate is generated based on Euclidean metric calculations and all associated coordinates
are saved to a new PDB file by the second toolbox. The coordinates were used in
Windowed Root-mean-square Deviation (RMSD) to find the different between two
identical structures from one occupancy state to another. RMSD plots showed that the
DP and TP from 1BMF have the same conformation while the E differs in geometric
positions. All three -subunits are identical. The last process uses windowed searching
strategy to find Walker-Motif-A sequences in -subunits. Associated coordinates are
saved to another PDB file. RMS Superposition was employed to find transformational
compositions of -carbon coordinates between identical -subunits having different occupancy
states. Means of RMSD values of the coordinates from Spherical Boundary
Partition were reduced. The last toolbox found Walker-Motif-A sequence
156GGAGVGKT163 of the -chains and the coordinates of this sequence were saved into
another new PDB file.
In summary, the Coordinates Manipulation Toolboxes for F1-ATPase have been
developed and provide PDB files that can be vectorized in which other mathematic
modeling could be applied to lead us one step closer to the system accomplishment