ISDA: 1P9N

Deposition Date 2003-05-12

Release Date 2003-05-20

Last Version Date 2024-10-30

Entry Detail

PDB ID:

1P9N

Keywords:

BIOSYNTHETIC PROTEIN

Title:

Crystal structure of Escherichia coli MobB.

Biological Source:

Source Organism(s):

Escherichia coli (Taxon ID: 562)

Expression System(s):

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.80 Å

R-Value Free:

0.30

R-Value Work:

0.27

R-Value Observed:

0.27

Space Group:

P 64 2 2

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Molybdopterin-guanine dinucleotide biosynthesis protein B
Gene (Uniprot):mobB
Chain IDs:A, B
Chain Length:170
Number of Molecules:2
Biological Source:Escherichia coli

UniProt ID:P32125 Pfam ID:PF03205

Modified Residue

Compound ID	Chain ID	Parent Comp ID	Details	2D Image
MSE	A	MET	SELENOMETHIONINE

Ligand Molecules

SO4

Primary Citation

Molecules of Escherichia coli MobB assemble into densely packed hollow cylinders in a crystal lattice with 75% solvent content.

Rangarajan, S.E, Tocilj, A, Li, Y, Iannuzzi, P, Matte, A, Cygler, M.Show

Acta Crystallogr.,Sect.D 59 2348 2352 (2003)

PMID: 14646116 DOI: 10.1107/S090744490301967X

Abstact

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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Primary Citation of related structures

Abstact

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