We have employed 15N and 31P NMR techniques to characterize the conformations of trimethoprim (TMP)/E. coli dihydrofolate reductase (DHFR) complexes in the presence and absence of NADPH and NADP+. A single conformation was observed for TMP/DHFR, NADP+/DHFR, NADPH/DHFR, and TMP/NADPH/DHFR complexes. In the ternary complex of TMP/NADP+/DHFR both the 15N and 31P spectra revealed the presence of two conformations. However, the conformations of TMP and NADP+ in the ternary complex may not be correlated, resulting in the possible existence of four conformations for the protein ternary complex.
[NMR paper] Refolding of [6-19F]tryptophan-labeled Escherichia coli dihydrofolate reductase in th
Refolding of tryptophan-labeled Escherichia coli dihydrofolate reductase in the presence of ligand: a stopped-flow NMR spectroscopy study.
Related Articles Refolding of tryptophan-labeled Escherichia coli dihydrofolate reductase in the presence of ligand: a stopped-flow NMR spectroscopy study.
Biochemistry. 1998 Jan 6;37(1):387-98
Authors: Hoeltzli SD, Frieden C
Escherichia coli dihydrofolate reductase contains five tryptophan residues that are spatially distributed throughout the protein and located in different secondary structural elements....
nmrlearner
Journal club
0
11-17-2010 11:06 PM
[NMR paper] Dynamics of trimethoprim bound to dihydrofolate reductase--a deuterium NMR study.
Dynamics of trimethoprim bound to dihydrofolate reductase--a deuterium NMR study.
http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--linkinghub.elsevier.com-ihub-images-PubMedLink.gif Related Articles Dynamics of trimethoprim bound to dihydrofolate reductase--a deuterium NMR study.
Solid State Nucl Magn Reson. 1996 Dec;7(3):193-201
Authors: Yang QX, Huang FY, Lin TH, Gelbaum L, Howell EE, Huang TH
We have employed deuterium NMR techniques to determine the dynamics of trimethoprim (TMP) in a binary complex with dihydrofolate reductase...
nmrlearner
Journal club
0
08-22-2010 02:20 PM
[NMR paper] The effect of hydration on the dynamics of trimethoprim bound to dihydrofolate reduct
The effect of hydration on the dynamics of trimethoprim bound to dihydrofolate reductase. A deuterium NMR study.
http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--linkinghub.elsevier.com-ihub-images-cellhub.gif http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--www.pubmedcentral.nih.gov-corehtml-pmc-pmcgifs-pubmed-pmc.gif Related Articles The effect of hydration on the dynamics of trimethoprim bound to dihydrofolate reductase. A deuterium NMR study.
Biophys J. 1993 Apr;64(4):1361-5
Authors: Yang QX, Huang FY, Huang TH, Gelbaum L
To...
nmrlearner
Journal club
0
08-21-2010 11:53 PM
[NMR paper] 13C NMR studies of complexes of Escherichia coli dihydrofolate reductase formed with
13C NMR studies of complexes of Escherichia coli dihydrofolate reductase formed with methotrexate and with folic acid.
http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--linkinghub.elsevier.com-ihub-images-PubMedLink.gif Related Articles 13C NMR studies of complexes of Escherichia coli dihydrofolate reductase formed with methotrexate and with folic acid.
FEBS Lett. 1992 Nov 9;312(2-3):147-51
Authors: Cheung HT, Birdsall B, Feeney J
13C NMR studies of 13C-labelled ligands bound to dihydrofolate reductase provide (DHFR) a powerful means of...
nmrlearner
Journal club
0
08-21-2010 11:45 PM
[NMR paper] Dihydrofolate reductase: sequential resonance assignments using 2D and 3D NMR and sec
Dihydrofolate reductase: sequential resonance assignments using 2D and 3D NMR and secondary structure determination in solution.
Related Articles Dihydrofolate reductase: sequential resonance assignments using 2D and 3D NMR and secondary structure determination in solution.
Biochemistry. 1991 Jun 25;30(25):6330-41
Authors: Carr MD, Birdsall B, Frenkiel TA, Bauer CJ, Jimenez-Barbero J, Polshakov VI, McCormick JE, Roberts GC, Feeney J
Three-dimensional (3D) heteronuclear NMR techniques have been used to make sequential 1H and 15N resonance...
nmrlearner
Journal club
0
08-21-2010 11:16 PM
[NMR paper] NMR studies of interactions of ligands with dihydrofolate reductase.
NMR studies of interactions of ligands with dihydrofolate reductase.
http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--linkinghub.elsevier.com-ihub-images-PubMedLink.gif Related Articles NMR studies of interactions of ligands with dihydrofolate reductase.
Biochem Pharmacol. 1990 Jul 1;40(1):141-52
Authors: Feeney J
NMR spectroscopy is a useful technique for studying interactions, conformations and dynamic processes within ligand-protein complexes. Several examples of the application of the method to studies of complexes of anti-folate...