1QD3

HIV-1 TAR RNA/NEOMYCIN B COMPLEX


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 17 
  • Selection Criteria: LOWEST ENERGY, AGREEMENT WITH EXPERIMENTAL DATA 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural rearrangements of HIV-1 Tat-responsive RNA upon binding of neomycin B.

Faber, C.Sticht, H.Schweimer, K.Rosch, P.

(2000) J.Biol.Chem. 275: 20660-20666

  • DOI: 10.1074/jbc.M000920200

  • PubMed Abstract: 
  • Binding of human immunodeficiency virus type 1 (HIV-1) transactivator (Tat) protein to Tat-responsive RNA (TAR) is essential for viral replication and is considered a promising starting point for the design of anti-HIV drugs. NMR spectroscopy indicat ...

    Binding of human immunodeficiency virus type 1 (HIV-1) transactivator (Tat) protein to Tat-responsive RNA (TAR) is essential for viral replication and is considered a promising starting point for the design of anti-HIV drugs. NMR spectroscopy indicated that the aminoglycosides neomycin B and ribostamycin bind to TAR and that neomycin is able to inhibit Tat binding to TAR. The solution structure of the neomycin-bound TAR has been determined by NMR spectroscopy. Chemical shift mapping and intermolecular nuclear Overhauser effects define the binding region of the aminoglycosides on TAR and give strong evidence for minor groove binding. Based on 15 nuclear Overhauser effect-derived intermolecular distance restraints, a model structure of the TAR-neomycin complex was calculated. Neomycin is bound in a binding pocket formed by the minor groove of the lower stem and the uridine-rich bulge of TAR, which adopts a conformation different from those known. The neamine core of the aminoglycoside (rings I and II) is covered with the bulge, explaining the inhibition of Tat by an allosteric mechanism. Neomycin reduces the volume of the major groove in which Tat is bound and thus impedes essential protein-RNA contacts.


    Related Citations: 
    • Binding of Neomycin to the Tar Element of HIV-1 RNA Induces Dissociation of Tat Protein by an Allosteric Mechanism
      Wang, S.,Huber, P.W.,Mei, C.,Czarnik, A.W.,Mei, H.Y.
      (1998) Biochemistry 37: 5549


    Organizational Affiliation

    Lehrstuhl für Biopolymere, Universität Bayreuth, D-95447 Bayreuth, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsLengthOrganism
HIV-1 TAR RNAA29Human immunodeficiency virus 1
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BDG
Query on BDG

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A
O-2,6-DIAMINO-2,6-DIDEOXY-ALPHA-D-GLUCOPYRANOSE
C6 H14 N2 O4
SQTHUUHOUPJYLK-UKFBFLRUSA-N
 Ligand Interaction
CYY
Query on CYY

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Download CCD File 
A
2-DEOXYSTREPTAMINE
C6 H14 N2 O3
DTFAJAKTSMLKAT-JDCCYXBGSA-N
 Ligand Interaction
IDG
Query on IDG

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Download CCD File 
A
O-2,6-DIAMINO-2,6-DIDEOXY-BETA-L-IDOPYRANOSE
C6 H14 N2 O4
SQTHUUHOUPJYLK-BSQWINAVSA-N
 Ligand Interaction
RIB
Query on RIB

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Download CCD File 
A
RIBOSE
C5 H10 O5
HMFHBZSHGGEWLO-AIHAYLRMSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
RIBKd: 5900 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 17 
  • Selection Criteria: LOWEST ENERGY, AGREEMENT WITH EXPERIMENTAL DATA 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-07-12
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance