PDB SH - PDB - SHift coordinates

PURPOSE

Shift coordinates in a PDB file.   Example.

SEE ALSO

PDBCG3	[PDB - Calculate center of gravity]
PDBIF	[PDB - Find information]
PDBPTS	[PDB - Put coordinates in SPIDER document file.]
PDBRT3	[PDB - Rotate by Euler angles in 3D space]
PDBRT3A	[PDB - Rotate by Euler angles around arbitrary center]
PDBRT3L	[PDB - Rotate PDB file around line]
PDBSTP	[PDB - Create PDB file from coordinate list]

UUSAGE:    PDB SH
         
          .PDB INPUT FILE: abc.pdb
          [Enter the name of the PDB file to be shifted with extension 'pdb'.] 

          .PDB OUTPUT FILE: def.pdb
          [Enter the name of the output PDB file with extension 'pdb'.] 
   
	  .X, Y, & Z SHIFT IN ANGSTROMS: 100, 200, 300
           [Enter X, Y, Z shift (Angstroms)in SPIDER coordinates. If your 
            shift is in units of pixels, multiply it by pixel size.] 

NOTES	    1. The program changes the shift into PDB format, and then 
	    applies the shift operation to PDB coordinates:  


               a. Change the coordinate system               

                    SX =  SYT                                  

                    SY =  SXT                                  

                    SZ = -SZT                                  


               b. Apply shift operation to PDB coordinates 

                     X = XO + SX                                 

                     Y = YO + SY                                 

                     Z = ZO + SZ                                 


	    2. This operation does not change the format of a PDB file. 
 
            3. Implemented by Zhong Huang, Pawel A. Penzcek. 

SUBROUTINES:  PDB

CALLER:       DRIV1