Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

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

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

Macromolecule Content

• Total Structure Weight: 22.53 kDa 
• Atom Count: 1749 
• Modelled Residue Count: 198 
• Deposited Residue Count: 198 
• Unique protein chains: 1

3SA4

Crystal structure of wild-type HIV-1 protease in complex with AF72

• PDB DOI: 10.2210/pdb3SA4/pdb

• Classification: HYDROLASE/HYDROLASE INHIBITOR
• Organism(s): Human immunodeficiency virus 1
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2011-06-02 Released: 2012-06-06 
• Deposition Author(s): Schiffer, C.A., Nalam, M.N.L.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.213 
• R-Value Work: 0.176 
• R-Value Observed: 0.178 

Literature

Protease Inhibitors that protrude out from substrate envelope are more susceptible to developing drug resistance

Altman, M.D., Nalam, M.N.L., Ali, A., Cao, H., Rana, T.M., Schiffer, C.A., Tidor, B.

To be published.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Protease	A, B	99	Human immunodeficiency virus 1	Mutation(s): 1  Gene Names: gag-pol, pol
UniProt
Find proteins for O38732 (Human immunodeficiency virus 1) Explore O38732  Go to UniProtKB:  O38732

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
F72	G [auth B]	N-{(2S,3R)-4-[(1,3-benzothiazol-6-ylsulfonyl)(cyclohexylmethyl)amino]-3-hydroxy-1-phenylbutan-2-yl}-3-hydroxybenzamide C31 H35 N3 O5 S2 ZALSSBYFYBCJII-URLMMPGGSA-N
PO4	C [auth A], D [auth A]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K
ACT	E [auth A], F [auth A]	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M

Binding Affinity Annotations
ID	Source	Binding Affinity
F72	BindingDB:  3SA4	Ki: 0.13 (nM) from 1 assay(s)
		EC50: min: 37.9, max: 63.7 (nM) from 2 assay(s)

Biologically Interesting Molecules (External Reference) 1 Unique

Entity ID: 4
ID	Chains	Name	Type/Class	2D Diagram	3D Interactions
PRD_000947 (F72)	G [auth B]	N-{(2S,3R)-4-[(1,3-BENZOTHIAZOL-6-YLSULFONYL)(CYCLOHEXYLMETHYL)AMINO]-3-HYDROXY-1-PHENYLBUTAN-2-YL}-3-HYDROXYBENZAMIDE	Peptide-like / Inhibitor		Ligand Interaction

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.213 
• R-Value Work: 0.176 
• R-Value Observed: 0.178 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 50.893	α = 90
b = 58.004	β = 90
c = 61.742	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data reduction
HKL-2000	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-06-02 
• Released Date: 2012-06-06 
Deposition Author(s): Schiffer, C.A., Nalam, M.N.L.

Revision History  

• Version 1.0: 2012-06-06
  Type: Initial release
  
• Version 1.1: 2012-12-12
  Changes: Other
• Version 1.2: 2017-11-08
  Changes: Refinement description