3EM3

Crystal structure of amprenavir (APV) in complex with a drug resistant HIV-1 protease variant (I50L/A71V).

• PDB DOI: https://doi.org/10.2210/pdb3EM3/pdb

• Classification: HYDROLASE
• Organism(s): HIV-1 M:B_ARV2/SF2
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2008-09-23 Released: 2009-09-01 
• Deposition Author(s): Prabu-Jeyabalan, M., King, N., Royer, C., Schiffer, C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.247 
• R-Value Work: 0.186 
• R-Value Observed: 0.188 

Starting Model: experimental

Literature

Kinetic and Structural Studies on Atazanavir-specific I50L Drug-Resistant HIV-1 Protease Mutant

Prabu-Jeyabalan, M., King, N., Bandaranayake, R., Nalivaika, E., Schiffer, C.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 22.43 kDa 
• Atom Count: 1,642 
• Modelled Residue Count: 198 
• Deposited Residue Count: 198 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Protease	A, B	99	HIV-1 M:B_ARV2/SF2	Mutation(s): 4  Gene Names: gag-pol, HIV-1 subtype B EC: 3.4.23.16
UniProt
Find proteins for P03369 (Human immunodeficiency virus type 1 group M subtype B (isolate ARV2/SF2)) Explore P03369  Go to UniProtKB:  P03369

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
478	G [auth B]	{3-[(4-AMINO-BENZENESULFONYL)-ISOBUTYL-AMINO]-1-BENZYL-2-HYDROXY-PROPYL}-CARBAMIC ACID TETRAHYDRO-FURAN-3-YL ESTER C25 H35 N3 O6 S YMARZQAQMVYCKC-OEMFJLHTSA-N
ACT	C [auth A], D [auth A], E [auth A], F [auth A]	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.247 
• R-Value Work: 0.186 
• R-Value Observed: 0.188 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.16	α = 90
b = 57.907	β = 90
c = 61.21	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2009-09-01 
Deposition Author(s): Prabu-Jeyabalan, M., King, N., Royer, C., Schiffer, C.

Revision History  

• Version 1.0: 2009-09-01
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Version format compliance
• Version 1.2: 2017-10-25
  Changes: Advisory, Refinement description
• Version 1.3: 2018-01-24
  Changes: Database references
• Version 1.4: 2021-10-20
  Changes: Advisory, Database references, Derived calculations
• Version 1.5: 2023-09-06
  Changes: Data collection, Refinement description