1p9n

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spinqualitylabelsall models PDB ID 1p9n Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image
, resolution 2.80Å
Ligands:
Gene:	MobB (Escherichia coli)
Coordinates:	save as pdb, mmCIF, xml

Crystal structure of Escherichia coli MobB.

Overview

The crystal structure of Escherichia coli MobB, an enzyme involved in the final step of molybdenum-cofactor biosynthesis, forms intertwined dimers. Each molecule consists of two segments and requires the second monomer for stable folding. Dimerization buries a quarter of the solvent-accessible area of the monomer. These dimers assemble into a hexagonal lattice with P6(4)22 symmetry and occupy only approximately 25% of the unit-cell volume. The symmetry-related dimers associate tightly into a helical structure with a diameter of 250 A and a pitch of 98 A. Two such helices are intertwined, shifted by 49 A along the sixfold axis. Within the crystal, these helices form thin-walled cylinders with an external diameter of 250 A and an internal diameter of 190 A. Their center is filled with solvent. These cylinders pack closely together, forming a hexagonal lattice with the highest possible packing density. This arrangement of dimers allows extensive intermolecular contacts with 75% solvent content in the crystal.

About this Structure

1P9N is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.

Reference

Molecules of Escherichia coli MobB assemble into densely packed hollow cylinders in a crystal lattice with 75% solvent content., Rangarajan SE, Tocilj A, Li Y, Iannuzzi P, Matte A, Cygler M, Acta Crystallogr D Biol Crystallogr. 2003 Dec;59(Pt 12):2348-52. Epub 2003, Nov 27. PMID:14646116

Page seeded by OCA on Thu Mar 20 13:21:42 2008