1DAZ

Structural and kinetic analysis of drug resistant mutants of HIV-1 protease

1DAZ の概要

• エントリーDOI: 10.2210/pdb1daz/pdb
• 関連するPDBエントリー: 1A94
• 関連するBIRD辞書のPRD_ID: PRD_000349
• 分子名称: HIV-1 PROTEASE (RETROPEPSIN), N-[(2R)-2-({N~5~-[amino(iminio)methyl]-L-ornithyl-L-valyl}amino)-4-methylpentyl]-L-phenylalanyl-L-alpha-glutamyl-L-alanyl-L-norleucinamide (3 entities in total)
• 機能のキーワード: hiv-1 protease, hydrolase-hydrolase inhibitor complex, reduced peptide inhibitor, hydrolase/hydrolase inhibitor
• 由来する生物種: Human immunodeficiency virus 1
• 細胞内の位置: Matrix protein p17: Virion (Potential). Capsid protein p24: Virion (Potential). Nucleocapsid protein p7: Virion (Potential). Reverse transcriptase/ribonuclease H: Virion (Potential). Integrase: Virion (Potential): P03367
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 22282.36

構造登録者

Mahalingam, B.,Louis, J.M.,Reed, C.C.,Adomat, J.M.,Krouse, J.,Wang, Y.F.,Harrison, R.W.,Weber, I.T. (登録日: 1999-11-01, 公開日: 2000-05-03, 最終更新日: 2024-03-13)

主引用文献

Mahalingam, B.,Louis, J.M.,Reed, C.C.,Adomat, J.M.,Krouse, J.,Wang, Y.F.,Harrison, R.W.,Weber, I.T.
Structural and kinetic analysis of drug resistant mutants of HIV-1 protease.
Eur.J.Biochem., 263:238-245, 1999

PubMed Abstract: Mutants of HIV-1 protease that are commonly selected on exposure to different drugs, V82S, G48V, N88D and L90M, showed reduced catalytic activity compared to the wild-type protease on cleavage site peptides, CA-p2, p6pol-PR and PR-RT, critical for viral maturation. Mutant V82S is the least active (2-20% of wild-type protease), mutants N88D, R8Q, and L90M exhibit activities ranging from 20 to 40% and G48V from 50 to 80% of the wild-type activity. In contrast, D30N is variable in its activity on different substrates (10-110% of wild-type), with the PR-RT site being the most affected. Mutants K45I and M46L, usually selected in combination with other mutations, showed activities that are similar to (60-110%) or greater than (110-530%) wild-type, respectively. No direct relationship was observed between catalytic activity, inhibition, and structural stability. The mutants D30N and V82S were similar to wild-type protease in their stability toward urea denaturation, while R8Q, G48V, and L90M showed 1.5 to 2.7-fold decreased stability, and N88D and K45I showed 1.6 to 1.7-fold increased stability. The crystal structures of R8Q, K45I and L90M mutants complexed with a CA-p2 analog inhibitor were determined at 2.0, 1.55 and 1.88 A resolution, respectively, and compared to the wild-type structure. The intersubunit hydrophobic contacts observed in the crystal structures are in good agreement with the relative structural stability of the mutant proteases. All these results suggest that viral resistance does not arise by a single mechanism.

PubMed: 10429209
DOI: 10.1046/j.1432-1327.1999.00514.x

実験手法

X-RAY DIFFRACTION (1.55 Å)