2AZ1 image
Deposition Date 2005-09-09
Release Date 2005-12-20
Last Version Date 2023-10-25
Entry Detail
PDB ID:
2AZ1
Keywords:
TRANSFERASE
Title:
Structure of a halophilic nucleoside diphosphate kinase from Halobacterium salinarum
Biological Source:
Source Organism:
Halobacterium salinarum (Taxon ID: 2242)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.35 Å
R-Value Free:
0.28
R-Value Work:
0.21
R-Value Observed:
0.22
Space Group:
P 21 21 21
2AZ1 validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Nucleoside diphosphate kinase
Gene (Uniprot):ndk
Chain IDs:A, B, C, D, E, F
Chain Length:181
Number of Molecules:6
Biological Source:Halobacterium salinarum
UniProt ID:P61136 Pfam ID:PF00334 EC:2.7.4.6
Ligand Molecules
CA
Primary Citation
Structure of a halophilic nucleoside diphosphate kinase from Halobacterium salinarum
Febs Lett. 579 6595 6600 (2005)
PMID: 16293253 DOI: 10.1016/j.febslet.2005.10.052

Abstact

Nucleoside diphosphate kinase from the halophilic archaeon Halobacterium salinarum was crystallized in a free state and a substrate-bound form with CDP. The structures were solved to a resolution of 2.35 and 2.2A, respectively. Crystals with the apo-form were obtained with His6-tagged enzyme, whereas the untagged form was used for co-crystallization with the nucleotide. Crosslinking under different salt and pH conditions revealed a stronger oligomerization tendency for the tagged protein at low and high salt concentrations. The influence of the His6-tag on the halophilic nature of the enzyme is discussed on the basis of the observed structural properties.

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Primary Citation of related structures
1NUE
2AZ3