SYSTEM 
HIV-1 PR 
(BH10 isolate) with inhibitor SB203386
HIVdb File 
hiv7skb
PDB File 
1sbg 
Company or Laboratory 
SmithKline Beecham Pharmaceuticals
Year 
1994
INHIBITOR (Type) 
SB 203386 (hydroxyethylene isostere) 
Composition of the Inhibitor (Substrate) or Summary Formula 
(2R, 4S, 5S, 1'S)- 2 - phenyl methyl - 4 - hydroxy - 5 - (tert - butoxy carbonyl) amino - 6 - phenyl hexanoyl - N - (1'-imidazo - 2 - YL)- 2'- methyl propan amide
Schematic Formula 
SB 203386 
Resolution 
2.3Ao
R factor 
0.188
Space Group 
P61
Dimension of Elementary Cell 
a=63.40,b=63.40,c=83.70
a,b,g
(alpha,beta,gamma)
a=b=90.00,g=120.00
Reference  S.S.Abdel-Meguid, B.W. Metcalf, T.J.Carr, P. Demarsh, S. Fisher, K.H.M.Murthy, B.Zhao, E.Winborne, D.W.Green, R.L.Des Jarlais, T.A.Tomaszek, T.D.Meek et al; Biochemistry, 33, 11671, 1994
Comment  It is presently unclear exactly which properties of the imidazole ring result in the enhancement of the pharmacokinetic properties. The benefits ot this amide surrogate are probably manifold