1CPI

REGIOSELECTIVE STRUCTURAL AND FUNCTIONAL MIMICRY OF PEPTIDES. DESIGN OF HYDROLYTICALLY STABLE CYCLIC PEPTIDOMIMETIC INHIBITORS OF HIV-1 PROTEASE

• PDB DOI: https://doi.org/10.2210/pdb1CPI/pdb

• Classification: HYDROLASE/HYDROLASE INHIBITOR
• Organism(s): Human immunodeficiency virus type 1 group M subtype B (isolate ARV2/SF2)
• Mutation(s): No 


• Deposited: 1995-10-16 Released: 1996-03-08 
• Deposition Author(s): Martin, J.L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.05 Å
• R-Value Free: 0.237 
• R-Value Work: 0.163 
• R-Value Observed: 0.163 

Literature

REGIOSELECTIVE STRUCTURAL AND FUNCTIONAL MIMICRY OF PEPTIDES - DESIGN OF HYDROLYTICALLY-STABLE CYCLIC PEPTIDOMIMETIC INHIBITORS OF HIV-1 PROTEASE.

Abbenante, G., March, D.R., Bergman, D.A., Hunt, P.A., Garnham, B., Dancer, R.J., Martin, J.L., Fairlie, D.P.

(1995) J Am Chem Soc 117: 10220-10226

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A2B1 Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 2-mer - A2 

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

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

Macromolecule Content

• Total Structure Weight: 22.59 kDa 
• Atom Count: 1,651 
• Modelled Residue Count: 204 
• Deposited Residue Count: 204 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HIV-1 PROTEASE	A, B	99	N/A	Mutation(s): 0
UniProt
Find proteins for P03369 (Human immunodeficiency virus type 1 group M subtype B (isolate ARV2/SF2)) Explore P03369  Go to UniProtKB:  P03369

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
CYCLIC PEPTIDE INHIBITOR	C	6	N/A	Mutation(s): 0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	D [auth A], E [auth A], F [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
ABA	A, B	L-PEPTIDE LINKING	C4 H9 N O2		ALA

Biologically Interesting Molecules (External Reference) 1 Unique

Entity ID: 2
ID	Chains	Name	Type/Class	2D Diagram	3D Interactions
PRD_000407	C	1-{(2R)-2-[(8R,11S)-8-(2-amino-2-oxoethyl)-6,9-dioxo-2-oxa-7,10-diazabicyclo[11.2.2]heptadeca-1(15),13,16-trien-11-yl]- 2-hydroxyethyl}-L-prolyl-L-isoleucyl-L-valinamide	Peptide-like / Inhibitor

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.05 Å
• R-Value Free: 0.237 
• R-Value Work: 0.163 
• R-Value Observed: 0.163 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.3	α = 90
b = 58.8	β = 90
c = 62.3	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
PROCESS	data reduction
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1996-03-08 
Deposition Author(s): Martin, J.L.

Revision History  

• Version 1.0: 1996-03-08
  Type: Initial release
  
• Version 1.1: 2008-05-22
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
• Version 1.3: 2012-12-12
  Changes: Other
• Version 1.4: 2024-06-05
  Changes: Advisory, Data collection, Database references, Derived calculations, Other