CP FROM PDB - Copy PDB file to SPIDER format

PURPOSE

Copy a PDB image data file to SPIDER volume.

SEE ALSO

CP FROM ASCII	[Copy ASCII text file to SPIDER file]
CP FROM CCP4	[Copy CCP4 format File to SPIDER file]
CP FROM EMI	[Copy EMISPEC format file to SPIDER file]
CP FROM MRC	[Copy MRC format file to SPIDER file]
CP FROM PDB	[Copy PDB file to SPIDER format]
CP FROM PE	[Copy Perkin Elmer disk file to SPIDER format]
CP FROM RAW	[Copy Raw Image to SPIDER file]
CP FROM TERM	[Copy Terminal input to SPIDER file]
CP FROM VAX	[Copy VAX SPIDER file to a Unix SPIDER file]
CP FROM XP	[Copy X-PLOR ASCII file to SPIDER file]
CP TO ASCII	[Copy SPIDER file to ASCII text format]
CP TO BRIX	[Copy SPIDER volume to BRIX file for "O" input]
CP TO CCP4	[Copy SPIDER file To CCP4 format file]
CP TO MRC	[Copy SPIDER file T0 MRC format file]
CP TO OPEND	[Copy SPIDER file To Opposite Endedness]
CP TO POST	[Copy SPIDER image to a POSTscript image]
CP TO RAW	[Copy SPIDER file to a 8-bit raw image]
CP TO SGI	[Copy SPIDER file to SGI format]
CP TO TIFF	[Copy SPIDER file to a TIFF format]
CP TO VV	[Copy SPIDER volume to Voxel View format]
CP TO XPLOR	[Copy SPIDER volume to X-PLOR format]

USAGE

.OPERATION: CP FROM PDB

.PDB INPUT FILE: TRNA03.PDB
[Enter the name of PDB file with extension.]

.VOXEL SIZE (A): 2.2
[Enter the voxel size of SPIDER file in angstroms.]

.CENTER (Y/N): Y
[Do you want the PDB file to be centered within the SPIDER volume? If No, the PDB file will be placed in the "absolute" location, as defined by atomic coordinates given. If Yes, the average X, Y, Z coordinates will coincide with the center of SPIDER volume ( INT(N/2)+1).]

.ATOMS OR TEMPERATURE (A/T): A
[Do you want SPIDER volume to caontain an Atoms/Occupancy value or a 'Temperature' value?.]

.VOLUME NSAM, NROW, & NSLICE: 75, 9, 85
[Enter size of the SPIDER file (number of voxels in each dimension).]

.SPIDER OUTPUT FILE: TRNA03
[Enter the file that will contain the volume.]

NOTES

1. The program reads atomic coordinates of a structure from a PDB file, then creates a SPIDER volume by adding the Z values times the occupancy factor in each resolution cell. The density is proportional to the Coulomb potential.

2. SPIDER coordiate system is different from that used in PDB files, thus PDB X coordinate corresponds to NROW, PDB Y to NSAM, and PDB Z to -NSLICE.

SUBROUTINES

READPDB

CALLER

COPY1