2K3M
Rv1761c
Summary for 2K3M
| Entry DOI | 10.2210/pdb2k3m/pdb |
| NMR Information | BMRB: 15774 |
| Descriptor | Rv1761c, S-[(1-oxyl-2,2,5,5-tetramethyl-2,5-dihydro-1H-pyrrol-3-yl)methyl] methanesulfonothioate (2 entities in total) |
| Functional Keywords | protein, integral membrane protein, membrane protein |
| Biological source | Mycobacterium tuberculosis |
| Total number of polymer chains | 1 |
| Total formula weight | 17028.65 |
| Authors | Page, R.C.,Moore, J.D.,Lee, S.,Opella, S.J.,Cross, T.A. (deposition date: 2008-05-14, release date: 2009-01-06, Last modification date: 2024-10-09) |
| Primary citation | Page, R.C.,Lee, S.,Moore, J.D.,Opella, S.J.,Cross, T.A. Backbone structure of a small helical integral membrane protein: A unique structural characterization. Protein Sci., 18:134-146, 2009 Cited by PubMed Abstract: The structural characterization of small integral membrane proteins pose a significant challenge for structural biology because of the multitude of molecular interactions between the protein and its heterogeneous environment. Here, the three-dimensional backbone structure of Rv1761c from Mycobacterium tuberculosis has been characterized using solution NMR spectroscopy and dodecylphosphocholine (DPC) micelles as a membrane mimetic environment. This 127 residue single transmembrane helix protein has a significant (10 kDa) C-terminal extramembranous domain. Five hundred and ninety distance, backbone dihedral, and orientational restraints were employed resulting in a 1.16 A rmsd backbone structure with a transmembrane domain defined at 0.40 A. The structure determination approach utilized residual dipolar coupling orientation data from partially aligned samples, long-range paramagnetic relaxation enhancement derived distances, and dihedral restraints from chemical shift indices to determine the global fold. This structural model of Rv1761c displays some influences by the membrane mimetic illustrating that the structure of these membrane proteins is dictated by a combination of the amino acid sequence and the protein's environment. These results demonstrate both the efficacy of the structural approach and the necessity to consider the biophysical properties of membrane mimetics when interpreting structural data of integral membrane proteins and, in particular, small integral membrane proteins. PubMed: 19177358DOI: 10.1002/pro.24 PDB entries with the same primary citation |
| Experimental method | SOLUTION NMR |
Structure validation
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