3FOO: A Triangular Cytochrome B562 Superstructure Mediated By Ni Coordination - Monoclinic Form

Citation:
Abstract
We previously devised a strategy (metal-directed protein self-assembly, MDPSA) that utilizes the simultaneous stability, lability, and directionality of metal-ligand bonds to drive protein-protein interactions. Here we show that both the structural and functional scopes of MDPSA can be broadened by incorporation of non-natural metal-chelating ligands onto protein surfaces. A cytochrome cb(562) variant, MBP-Phen1, which features a covalently attached phenanthroline (Phen) group on its surface, self-assembles into an unusual triangular architecture (Ni(3):MBP-Phen1(3)) upon binding Ni as a result of specific Phen-protein interactions. The crystal structure of Ni(3):MBP-Phen1(3) reveals that the Phen group is buried in a small pocket on the protein surface, which results in an unsaturated Ni coordination environment.
PDB ID: 3FOODownload
MMDB ID: 75309
PDB Deposition Date: 2008/12/30
Updated in MMDB: 2012/09
Experimental Method:
x-ray diffraction
Resolution: 2.4  Å
Source Organism:
Similar Structures:
Biological Unit for 3FOO: trimeric; determined by author
Molecular Components in 3FOO
Label Count Molecule
Proteins (3 molecules)
3
Soluble Cytochrome B562
Molecule annotation
Chemicals (12 molecules)
1
3
2
3
3
6
* Click molecule labels to explore molecular sequence information.

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