Related ArticlesBinding of the competitive inhibitor dCDP to ribonucleoside-diphosphate reductase from Escherichia coli studied by 1H NMR. Different properties of the large protein subunit and the holoenzyme.
Eur J Biochem. 1992 Sep 15;208(3):635-42
Authors: Allard P, Kuprin S, Shen B, Ehrenberg A
Ribonucleoside-diphosphate reductase (EC 1.17.4.1) from Escherichia coli consists of two nonidentical subunits, proteins R1 and R2. The binding of the product dCDP to protein R1 and to the holoenzyme R1R2 has been studied by means of 1H-NMR spectroscopy. In presence of the effector dTTP at 25 degrees C, dCDP was found to be in rapid exchange between the binding sites and the solvent which results in a broadening of the dCDP resonances. When both proteins R1 and R2 are present, so that the complex R1R2 is formed, a smaller broadening is observed than with protein R1 alone. No further linewidth decrease was observed when the [R2]/[R1] ratio exceeded 1. The binding constant of dCDP to R1 or R1R2 is the same, Kd = 0.9 mM. The smaller broadening of the dCDP resonances observed with the complex R1R2 as compared with R1 may be explained by the combination of two effects: (a) the overall tumbling time of the protein will increase when going from R1 to R1R2, which will cause the broadening to increase correspondingly, and (b) a twofold decrease of the number of binding sites in rapid exchange, which will decrease the broadening by a factor of 0.5. The effect of R2 without iron (apoR2) is reduced compared with native R2, probably because of some denatured proteins, while a C-terminal peptide from R2 did not cause any narrowing at all.
NMR Studies Reveal anUnexpected Binding Site for a Redox Inhibitor of AP Endonuclease 1
NMR Studies Reveal anUnexpected Binding Site for a Redox Inhibitor of AP Endonuclease 1
http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/bichaw/0/bichaw.ahead-of-print/bi201071g/aop/images/medium/bi-2011-01071g_0007.gif
Biochemistry
DOI: 10.1021/bi201071g
http://feeds.feedburner.com/~ff/acs/bichaw?d=yIl2AUoC8zA
http://feeds.feedburner.com/~r/acs/bichaw/~4/rjOfEh_C8Bk
More...
nmrlearner
Journal club
0
11-10-2011 07:38 AM
Thermodynamic and NMR analysis of inhibitor binding to dihydrofolate reductase.
Thermodynamic and NMR analysis of inhibitor binding to dihydrofolate reductase.
Thermodynamic and NMR analysis of inhibitor binding to dihydrofolate reductase.
Bioorg Med Chem. 2010 Dec 15;18(24):8485-92
Authors: Batruch I, Javasky E, Brown ED, Organ MG, Johnson PE
Isothermal titration calorimetry (ITC) was used to determine the thermodynamic driving force for inhibitor binding to the enzyme dihydrofolate reductase (DHFR) from Escherichia coli. 1,4-Bis-{sulfanylmethyl}-3,6-dimethyl-benzene (1) binds DHFR:NADPH with a K(d) of 13±5 nM while the...
nmrlearner
Journal club
0
03-09-2011 02:20 PM
[NMR paper] Epitope mapping and competitive binding of HSA drug site II ligands by NMR diffusion
Epitope mapping and competitive binding of HSA drug site II ligands by NMR diffusion measurements.
Related Articles Epitope mapping and competitive binding of HSA drug site II ligands by NMR diffusion measurements.
J Am Chem Soc. 2004 Nov 3;126(43):14258-66
Authors: Lucas LH, Price KE, Larive CK
It is important to characterize drug-albumin binding during drug discovery and lead optimization as strong binding may reduce bioavailability and/or increase the drug's in vivo half-life. Despite knowing about the location of human serum albumin (HSA)...
nmrlearner
Journal club
0
11-24-2010 10:03 PM
[NMR paper] Analysis of competitive binding of ligands to human serum albumin using NMR relaxatio
Analysis of competitive binding of ligands to human serum albumin using NMR relaxation measurements.
Related Articles Analysis of competitive binding of ligands to human serum albumin using NMR relaxation measurements.
J Pharm Biomed Anal. 2004 Feb 4;34(2):247-54
Authors: Cui YF, Bai GY, Li CG, Ye CH, Liu ML
The competitive binding of two ligands, ibuprofen (IBP) and salicylic acid (SAL), to human serum albumin (HSA) was studied by using nuclear magnetic resonance (NMR) relaxation measurements. When the concentration of one ligand was...
nmrlearner
Journal club
0
11-24-2010 09:25 PM
[NMR paper] NMR chemical shift mapping of the binding site of a protein proteinase inhibitor: cha
NMR chemical shift mapping of the binding site of a protein proteinase inhibitor: changes in the (1)H, (13)C and (15)N NMR chemical shifts of turkey ovomucoid third domain upon binding to bovine chymotrypsin A(alpha).
Related Articles NMR chemical shift mapping of the binding site of a protein proteinase inhibitor: changes in the (1)H, (13)C and (15)N NMR chemical shifts of turkey ovomucoid third domain upon binding to bovine chymotrypsin A(alpha).
J Mol Recognit. 2001 May-Jun;14(3):166-71
Authors: Song J, Markley JL
The substrate-like...
nmrlearner
Journal club
0
11-19-2010 08:32 PM
[NMR paper] Selective NMR observation of inhibitor and sugar binding to the galactose-H(+) sympor
Selective NMR observation of inhibitor and sugar binding to the galactose-H(+) symport protein GalP, of Escherichia coli.
Related Articles Selective NMR observation of inhibitor and sugar binding to the galactose-H(+) symport protein GalP, of Escherichia coli.
Biochim Biophys Acta. 2000 Dec 20;1509(1-2):55-64
Authors: Appleyard AN, Herbert RB, Henderson PJ, Watts A, Spooner PJ
The binding of the transport inhibitor forskolin, synthetically labelled with (13)C, to the galactose-H(+) symport protein GalP, overexpressed in its native inner...
[NMR paper] Studies on ribonucleoside-diphosphate reductase from Escherichia coli. The product dC
Studies on ribonucleoside-diphosphate reductase from Escherichia coli. The product dCDP is a competitive inhibitor and functions as a spectroscopic probe for the substrate binding site; demonstration by enzyme kinetics and 1H NMR.
http://www.ncbi.nlm.nih.gov/corehtml/query/egifs/http:--www3.interscience.wiley.com-aboutus-images-wiley_interscience_pubmed_logo_FREE_120x27.gif Related Articles Studies on ribonucleoside-diphosphate reductase from Escherichia coli. The product dCDP is a competitive inhibitor and functions as a spectroscopic probe for the substrate binding site;...
Binding of the competitive inhibitor dCDP to ribonucleoside-diphosphate reductase fro
Linear Mode
