1S3G

Crystal structure of adenylate kinase from Bacillus globisporus

Summary for 1S3G

• Entry DOI: 10.2210/pdb1s3g/pdb
• Descriptor: Adenylate kinase, ZINC ION, BIS(ADENOSINE)-5'-PENTAPHOSPHATE, ... (4 entities in total)
• Functional Keywords: psychrophile, transferase
• Biological source: Sporosarcina globispora
• Cellular location: Cytoplasm (By similarity): P84139
• Total number of polymer chains: 1
• Total formula weight: 24897.98

Authors

Bae, E.,Phillips Jr., G.N. (deposition date: 2004-01-13, release date: 2004-05-04, Last modification date: 2023-08-23)

Primary citation

Bae, E.,Phillips Jr., G.N.
Structures and analysis of highly homologous psychrophilic, mesophilic, and thermophilic adenylate kinases.
J.Biol.Chem., 279:28202-28208, 2004

PubMed Abstract: The crystal structures of adenylate kinases from the psychrophile Bacillus globisporus and the mesophile Bacillus subtilis have been solved and compared with that from the thermophile Bacillus stearothermophilus. This is the first example we know of where a trio of protein structures has been solved that have the same number of amino acids and a high level of identity (66-74%) and yet come from organisms with different operating temperatures. The enzymes were characterized for their own thermal denaturation and inactivation, and they exhibited the same temperature preferences as their source organisms. The structures of the three highly homologous, dynamic proteins with different temperature-activity profiles provide an opportunity to explore a molecular mechanism of cold and heat adaptation. Their analysis suggests that the maintenance of the balance between stability and flexibility is crucial for proteins to function at their environmental temperatures, and it is achieved by the modification of intramolecular interactions in the process of temperature adaptation.

PubMed: 15100224
DOI: 10.1074/jbc.M401865200

Experimental method

X-RAY DIFFRACTION (2.25 Å)