Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Qinmi Wang"'
Publikováno v:
Chinese Journal of Chemistry. 15:84-89
We have used quantum mechanical method to study the transition states(TSs) of uridine phosphorolysis reaction. Comparing the four different reaction pathways and the five transition states obtained, we conclude that enzymatic uridine phosphorolysis t
Publikováno v:
CNS Drug Reviews. 5:125-144
Benzodiazepine (BZ) binding site ligands are important central nervous system (CNS) drugs. Their numbers and our knowledge of how they interact with the BZ-binding site of GABAA receptors are both rapidly expanding. The GABAA receptor is a member of
Autor:
Andrea E. DeBarber, Dennis R. Koop, Hong Liu, Margit Spatzenegger, Qinmi Wang, James R. Halpert
Publikováno v:
Journal of Pharmacology and Experimental Therapeutics. 304:477-487
Human CYP2B6 and CYP2E1 were used to investigate the extent to which differential substrate selectivities between cytochrome P450 subfamilies reflect differences in active-site residues as opposed to distinct arrangement of the backbone of the enzyme
Publikováno v:
Archives of Biochemistry and Biophysics. 394:21-28
At least two substitutions were made at each of five amino acid residues in rat cytochrome P450 2B1 that align to residues of known importance in other P450s. The mutants were histidine tagged for purification from Escherichia coli, and the proteins
Autor:
You-Ai He, Fabienne Roussel, Qinmi Wang, Tammy L. Domanski, James R. Halpert, Kishore K. Khan
Publikováno v:
Biochemistry. 40:10150-10160
Phenylalanine and/or tryptophan scanning mutagenesis was performed at 15 sites within CYP3A4 proposed to be involved in substrate specificity or cooperativity. The sites were chosen on the basis of previous studies or from a comparison with the struc
Autor:
Huifen Faye Wang, Qinmi Wang, Grazyna D. Szklarz, Tammy L. Domanski, Linlong Xue, James R. Halpert, Maria Almira Correia
Publikováno v:
Chemical Research in Toxicology. 14:483-491
The major human liver drug-metabolizing cytochrome P450 enzymes P450 3A4 and P450 3A5 share >85% amino acid sequence identity yet exhibit different regioselectivity toward aflatoxin B(1) (AFB(1)) biotransformation [Gillam et al. (1995) Arch. Biochem.
Publikováno v:
Biophysical Chemistry. 75:129-139
The electronic structure of the whole molecule of acidic phospholipase A2 (PLA2) from the venom of Agkistrodon halys pallas (A. halys pallas) has been calculated using the extended negative factor counting (ENFC) method in which dimers were calculate
Publikováno v:
International Journal of Quantum Chemistry. 70:515-525
The acylation process in the acetylcholinesterase (AChE)-catalyzed hydrolysis of the neurotransmitter, acetylcholine (ACh), has been determined with the semiempirical quantum chemical calculation method AM1 using the model molecules extracted from th
Publikováno v:
Journal of Medicinal Chemistry. 40:3085-3090
The mechanism of inhibition of peptidyl inhibitors with thrombin was studied using molecular modeling, molecular mechanics, and CoMFA statistical analysis. A new procedure for the elucidation of binding conformations, BCSPL, is described and was empl
Autor:
James R. Halpert, Qinmi Wang
Publikováno v:
Drug metabolism and disposition: the biological fate of chemicals. 30(1)
Understanding the basis of the substrate specificity of cytochrome P450 2B6 (CYP2B6) is important for determining the role of this enzyme in drug metabolism and for predicting new substrates. Pharmacophores were generated for 16 structurally diverse