1nq4
From Proteopedia
| Line 1: | Line 1: | ||
[[Image:1nq4.jpg|left|200px]] | [[Image:1nq4.jpg|left|200px]] | ||
| - | + | <!-- | |
| - | + | The line below this paragraph, containing "STRUCTURE_1nq4", creates the "Structure Box" on the page. | |
| - | + | You may change the PDB parameter (which sets the PDB file loaded into the applet) | |
| - | + | or the SCENE parameter (which sets the initial scene displayed when the page is loaded), | |
| - | + | or leave the SCENE parameter empty for the default display. | |
| - | + | --> | |
| - | + | {{STRUCTURE_1nq4| PDB=1nq4 | SCENE= }} | |
| - | + | ||
| - | | | + | |
| - | }} | + | |
'''Solution Structure of Oxytetracycline Acyl Carrier Protein''' | '''Solution Structure of Oxytetracycline Acyl Carrier Protein''' | ||
| Line 30: | Line 27: | ||
[[Category: Simpson, T J.]] | [[Category: Simpson, T J.]] | ||
[[Category: Winsor, C.]] | [[Category: Winsor, C.]] | ||
| - | [[Category: | + | [[Category: Acp]] |
| - | [[Category: | + | [[Category: Dynamic]] |
| - | [[Category: | + | [[Category: Nmr]] |
| - | [[Category: | + | [[Category: Oxytetracycline]] |
| - | [[Category: | + | [[Category: Polyketide synthase]] |
| - | [[Category: | + | [[Category: Solution structure]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 02:50:49 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 23:50, 2 May 2008
Solution Structure of Oxytetracycline Acyl Carrier Protein
Overview
Type II polyketide synthases (PKSs) utilize a dedicated and essential acyl carrier protein (ACP) in the biosynthesis of a specific polyketide product. As part of our ongoing studies into the mechanisms and control of polyketide biosynthesis, we report the second structure of a polyketide synthase ACP. In this work, multidimensional, heteronuclear NMR was employed to investigate the structure and dynamics of the ACP involved in the biosynthesis of the commonly prescribed polyketide antibiotic, oxytetracycline (otc). An ensemble of 28 structures of the 95 amino acid otc ACP (9916Da) was computed by simulated annealing with the inclusion of 1132 experimental restraints. Atomic RMSDs about the mean structure for all 28 models is 0.66 A for backbone atoms, 1.15 A for all heavy atoms (both values calculated for the folded part of the protein (residues 3-80)), and 0.41 A for backbone atoms within secondary structure. Otc ACP adopts the typical right-handed, four-helix fold of currently known ACPs but with the addition of a 13-residue flexible C-terminus. A comparison of the global folds of all structurally characterized ACPs is described, illustrating that PKS ACPs show clear differences as well as similarities to FAS ACPs. (15)N relaxation experiments for the protein backbone also reveal that the long loop between helices I and II is flexible and helix II, a proposed site of protein-protein interactions, shows conformational exchange. The helices of the ACP form a rigid scaffold for the protein, but these are interspersed with an unusual proportion of flexible linker regions.
About this Structure
1NQ4 is a Single protein structure of sequence from Streptomyces rimosus. Full crystallographic information is available from OCA.
Reference
Solution structure and dynamics of oxytetracycline polyketide synthase acyl carrier protein from Streptomyces rimosus., Findlow SC, Winsor C, Simpson TJ, Crosby J, Crump MP, Biochemistry. 2003 Jul 22;42(28):8423-33. PMID:12859187 Page seeded by OCA on Sat May 3 02:50:49 2008
