1p9n: Difference between revisions

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[[Image:1p9n.jpg|left|200px]]
{{Seed}}
[[Image:1p9n.png|left|200px]]


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{{STRUCTURE_1p9n|  PDB=1p9n  |  SCENE=  }}  
{{STRUCTURE_1p9n|  PDB=1p9n  |  SCENE=  }}  


'''Crystal structure of Escherichia coli MobB.'''
===Crystal structure of Escherichia coli MobB.===




==Overview==
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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.
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{{ABSTRACT_PUBMED_14646116}}


==About this Structure==
==About this Structure==
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[[Category: Montreal-kingston bacterial structural genomics initiative]]
[[Category: Montreal-kingston bacterial structural genomics initiative]]
[[Category: Structural genomic]]
[[Category: Structural genomic]]
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