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| {{STRUCTURE_1k4k| PDB=1k4k | SCENE= }} | | {{STRUCTURE_1k4k| PDB=1k4k | SCENE= }} |
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| '''Crystal structure of E. coli Nicotinic acid mononucleotide adenylyltransferase'''
| | ===Crystal structure of E. coli Nicotinic acid mononucleotide adenylyltransferase=== |
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| ==Overview==
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| Nicotinamide/Nicotinate mononucleotide (NMN/NaMN) adenylyltransferase is an indispensable enzyme in both de novo biosynthesis and salvage of NAD+ and NADP+. In prokaryotes, it is absolutely required for cell survival, thus representing an attractive target for the development of new broad-spectrum antibacteria inhibitors. The crystal structures of E. coli NaMN adenylyltransferase (NMNAT) and its complex with deamido-NAD (NaAD) revealed that ligand binding causes large conformational changes in several loop regions around the active site. The enzyme specifically recognizes the deamidated pyridine nucleotide through interactions between nicotinate carboxylate with several protein main chain amides and a positive helix dipole. Comparison of E. coli NMNAT with those from archaeal organisms revealed extensive differences in the active site architecture, enzyme-ligand interaction mode, and bound dinucleotide conformations. The bacterial NaMN adenylyltransferase structures described here provide a foundation for structure-based design of specific inhibitors that may have therapeutic potential.
| | The line below this paragraph, {{ABSTRACT_PUBMED_11796112}}, adds the Publication Abstract to the page |
| | (as it appears on PubMed at http://www.pubmed.gov), where 11796112 is the PubMed ID number. |
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| | {{ABSTRACT_PUBMED_11796112}} |
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| ==About this Structure== | | ==About this Structure== |
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| [[Category: Zhou, T.]] | | [[Category: Zhou, T.]] |
| [[Category: Nucleotidyltransferase]] | | [[Category: Nucleotidyltransferase]] |
| ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 22:17:53 2008'' | | |
| | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jul 2 09:24:08 2008'' |