View source for 1bwa

[[Image:1bwa.gif|left|200px]]

 {{Structure
|PDB= 1bwa |SIZE=350|CAPTION= <scene name='initialview01'>1bwa</scene>, resolution 1.9&Aring;
|SITE= 
|LIGAND= <scene name='pdbligand=XV6:[4R-(4ALPHA,5ALPHA,6BETA,7BETA)]-3,3'-[[TETRAHYDRO-5,6-DIHYDROXY-2-OXO-4,7-BIS(PHENYLMETHYL)-1H-1,3-DIAZEPINE-1,3(2H)-DIYL] BIS(METHYLENE)]BIS[N-2-THIAZOLYLBENZAMIDE]'>XV6</scene>
|ACTIVITY= [http://en.wikipedia.org/wiki/HIV-1_retropepsin HIV-1 retropepsin], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.23.16 3.4.23.16] 
|GENE= 
}}

'''HIV-1 PROTEASE (V82F/I84V) DOUBLE MUTANT COMPLEXED WITH XV638 OF DUPONT PHARMACEUTICALS'''


==Overview==
The long-term therapeutic benefit of HIV antiretroviral therapy is still threatened by drug-resistant variants. Mutations in the S1 subsite of the protease are the primary cause for the loss of sensitivity toward many HIV protease inhibitors, including our first-generation cyclic urea-based inhibitors DMP323 and DMP450. We now report the structures of the three active-site mutant proteases V82F, I84V, and V82F/I84V in complex with XV638 and SD146, two P2 analogues of DMP323 that are 8-fold more potent against the wild type and are able to inhibit a broad panel of drug-resistant variants [Jadhav, P. K., et al. (1997) J. Med. Chem. 40, 181-191]. The increased efficacy of XV638 and SD146 is due primarily to an increase in P2-S2 interactions: 30-40% more van der Waals contacts and two to four additional hydrogen bonds. Furthermore, because these new interactions do not perturb other subsites in the protease, it appears that the large complementary surface areas of their P2 substituents compensate for the loss of P1-S1 interactions and reduce the probability of selecting for drug-resistant variants.

==About this Structure==
1BWA is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Human_immunodeficiency_virus_1 Human immunodeficiency virus 1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BWA OCA]. 

==Reference==
Counteracting HIV-1 protease drug resistance: structural analysis of mutant proteases complexed with XV638 and SD146, cyclic urea amides with broad specificities., Ala PJ, Huston EE, Klabe RM, Jadhav PK, Lam PY, Chang CH, Biochemistry. 1998 Oct 27;37(43):15042-9. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9790666 9790666]
[[Category: HIV-1 retropepsin]]
[[Category: Human immunodeficiency virus 1]]
[[Category: Single protein]]
[[Category: Ala, P.]]
[[Category: Chang, C H.]]
[[Category: XV6]]
[[Category: hiv-1 protease]]

''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 10:16:33 2008''