1IVP

THE CRYSTALLOGRAPHIC STRUCTURE OF THE PROTEASE FROM HUMAN IMMUNODEFICIENCY VIRUS TYPE 2 WITH TWO SYNTHETIC PEPTIDIC TRANSITION STATE ANALOG INHIBITORS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

The crystallographic structure of the protease from human immunodeficiency virus type 2 with two synthetic peptidic transition state analog inhibitors.

Mulichak, A.M.Hui, J.O.Tomasselli, A.G.Heinrikson, R.L.Curry, K.A.Tomich, C.S.Thaisrivongs, S.Sawyer, T.K.Watenpaugh, K.D.

(1993) J.Biol.Chem. 268: 13103-13109

  • Primary Citation of Related Structures:  1IVQ

  • PubMed Abstract: 
  • The crystal structure of human immunodeficiency virus (HIV) type 2 protease has been determined in complexes with peptidic inhibitors Noa-His-Cha psi [CH(OH)CH(OH)]Val-Ile-Amp (U75875) and Qnc-Asn-Cha psi [CH(OH)CH2]Val-Npt(U92163) (where Noa is naph ...

    The crystal structure of human immunodeficiency virus (HIV) type 2 protease has been determined in complexes with peptidic inhibitors Noa-His-Cha psi [CH(OH)CH(OH)]Val-Ile-Amp (U75875) and Qnc-Asn-Cha psi [CH(OH)CH2]Val-Npt(U92163) (where Noa is naphthyloxyacetyl, Cha is cyclohexylalanine, Amp is 2-aminomethylpyridine, Qnc is quinoline-2-carbonyl, and Npt is neopentylamine), which have dihydroxyethylene and hydroxyethylene moieties, respectively, in place of the normal scissile bond of the natural ligand. The complexes crystallize in space group P2(1)2(1)2(1), with one dimer-inhibitor complex per asymmetric unit and average cell dimensions of a = 33.28 A, b = 45.35 A, c = 135.84 A. Data were collected to approximately 2.5-A resolution. The model structures were refined with resulting R-factors of around 0.19. As expected, the HIV-2 protease structure is approximately C2-symmetric with a gross structure very similar to that of the HIV-1 enzyme. The inhibitors bind in an extended conformation positioned lengthwise in the binding cleft in a manner similar to that found in the HIV-1 protease-inhibitor complexes previously reported. The substitution of the bulkier Ile82 side chain in the HIV-2 protease may help explain the better ability of HIV-2 protease to bind and hydrolyze ligands with small P1 and P1' side groups. It appears that differences in specificity between the proteases of HIV-1 and HIV-2 are not merely a result of simple side chain substitutions, but may be complicated by differences in main chain flexibility as well.


    Organizational Affiliation

    Discovery Research, Upjohn Company, Kalamazoo, Michigan 49007.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HIV-2 PROTEASE
A, B
99Human immunodeficiency virus type 2 subtype AGene Names: gag-pol
EC: 3.1.-.-, 2.7.7.49, 2.7.7.7, 3.1.26.13, 2.7.7.-, 3.1.13.2, 3.4.23.47
Find proteins for P04584 (Human immunodeficiency virus type 2 subtype A)
Go to UniProtKB:  P04584
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1ZK
Query on 1ZK

Download SDF File 
Download CCD File 
B
4-[(2R)-3-{[(1S,2S,3R,4S)-1-(cyclohexylmethyl)-2,3-dihydroxy-5-methyl-4-({(1S,2R)-2-methyl-1-[(pyridin-2-ylmethyl)carbamoyl]butyl}carbamoyl)hexyl]amino}-2-{[(naphthalen-1-yloxy)acetyl]amino}-3-oxopropyl]-1H-imidazol-3-ium
U75875
C45 H62 N7 O7
ZTKCGLWIXHAITR-JIFWBGJESA-O
 Ligand Interaction
Biologically Interesting Molecules 1 Unique
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000403 (1ZK)
Query on PRD_000403
BNoa-His-Cha.psi.[CHOHCHOH]Val-Ile-Amp, U75875Peptide-like / Inhibitor

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External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
1ZKKi: 30 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 33.190α = 90.00
b = 44.950β = 90.00
c = 135.650γ = 90.00
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1993-07-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
  • Version 1.3: 2012-12-12
    Type: Other
  • Version 1.4: 2017-11-29
    Type: Derived calculations, Other