1q3t

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{{STRUCTURE_1q3t| PDB=1q3t | SCENE= }}
{{STRUCTURE_1q3t| PDB=1q3t | SCENE= }}
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'''Solution structure and function of an essential CMP kinase of Streptococcus pneumoniae'''
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===Solution structure and function of an essential CMP kinase of Streptococcus pneumoniae===
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==Overview==
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Streptococcus pneumoniae is a major human pathogen that causes high mortality and morbidity and has developed resistance to many antibiotics. We show that the gene product from SP1603, identified from S. pneumoniae TIGR4, is a CMP kinase that is essential for bacterial growth. It represents an attractive drug target for the development of a novel antibiotic to overcome the problems of drug resistance development for this organism. Here we describe the three-dimensional solution structure of the S. pneumoniae CMP kinase as determined by NMR spectroscopy. The structure consists of eight alpha-helices and two beta-sheets that fold into the classical core domain, the substrate-binding domain, and the LID domain. The three domains of the protein pack together to form a central cavity for substrate-binding and enzymatic catalysis. The S. pneumoniae CMP kinase resembles the fold of the Escherichia coli homolog. An insertion of one residue is observed at the beta-turn in the substrate-binding domain of the S. pneumoniae CMP kinase when compared with the E. coli homolog. Chemical shift perturbations caused by the binding of CMP, CDP, and ATP revealed that CMP or CDP binds to the junction between the core and substrate-binding domains, whereas ATP binds to the junction between the core and LID domains. From NMR relaxation studies, we determined that the loops in the LID domain are highly mobile. These mobile loops could aid in the closing/opening of the LID domain during enzyme catalysis.
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{{ABSTRACT_PUBMED_14573872}}
==About this Structure==
==About this Structure==
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1Q3T is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Streptococcus_pneumoniae Streptococcus pneumoniae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Q3T OCA].
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1Q3T is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Streptococcus_pneumoniae Streptococcus pneumoniae]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Q3T OCA].
==Reference==
==Reference==
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[[Category: Cytidylate kinase]]
[[Category: Cytidylate kinase]]
[[Category: Nucleotide monophosphate kinase]]
[[Category: Nucleotide monophosphate kinase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 11:08:33 2008''

Revision as of 08:08, 29 July 2008

Image:1q3t.png

Template:STRUCTURE 1q3t

Solution structure and function of an essential CMP kinase of Streptococcus pneumoniae

Template:ABSTRACT PUBMED 14573872

About this Structure

1Q3T is a Single protein structure of sequence from Streptococcus pneumoniae. Full experimental information is available from OCA.

Reference

Solution structure and function of an essential CMP kinase of Streptococcus pneumoniae., Yu L, Mack J, Hajduk PJ, Kakavas SJ, Saiki AY, Lerner CG, Olejniczak ET, Protein Sci. 2003 Nov;12(11):2613-21. PMID:14573872

Page seeded by OCA on Tue Jul 29 11:08:33 2008

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