The files 1bcc.pdb and 3bcc.pdb in this directory are the coordinate files submitted to the Brookhaven Protein Database in March 98 as updates for entries 1bcc and 3bcc.

1bcc is the structure of the chicken cytochrome bc1 complex from a native crystal. Ubiquinone at the Qi site, two PE molecules, and one OG, are modeled as residues 5, 6, 7, and 8 in chain L. One monomer is presented, the NCS-related monomer can be generated by applying a transform which can be expressed in O datablock form as:

.SPACE_GROUP_operators r 12 (3f14.7)

The structure is presented at it's coordinates in its native unit cell. To transform to a reference cell with the dimer 2-fold along the z axis, apply the inverse of the transform (ODB formnat):

3bcc is the structure from a crystal containing stigmatellin and antimycin. Models for these inhibitors are present as residues 5 and 6 of chain L. One monomer is presented, the NCS-related monomer can be generated by applying a transform which can be expressed in O datablock form as:

.SPACE_GROUP_operators r 12 (3f14.7)

The structure is presented at it's coordinates in its actual unit cell. To transform to a reference cell with the dimer 2-fold along the z axis, apply the inverse of the transform (ODB formnat):

The format of the "O" datablock rotation-translation operators given here is as follows:

Lines 2-5 contain the transform of the rotation matrix Line 6 contains a translation vector to be applied after the rotation.

This operator can be used by CCP4 PDBSET program with the syntax:

transform [invert] ODB filename.o

This file contains the coordinated for the complete dimer of the native complex.

This file contains the coordinated for the complete dimer of the complex containing stigmatellin and antimycin.

This file contains the coordinated for the three catalytic subunits of the "functional monomer" of the native complex, abstracted from the file 1bccdimref.pdb.

This file contains the coordinated for the three catalytic subunits of the "functional monomer" of the complex containing stigmatellin and antimycin, abstracted from the file 3bccdimref.pdb.