2W2H

Structural basis of transcription activation by the Cyclin T1-Tat-TAR RNA complex from EIAV


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.243 
  • R-Value Observed: 0.245 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural Insights Into the Cyclin T1-Tat-Tar RNA Transcription Activation Complex from Eiav.

Anand, K.Schulte, A.Vogel-Bachmayr, K.Scheffzek, K.Geyer, M.

(2008) Nat Struct Mol Biol 15: 1287

  • DOI: 10.1038/nsmb.1513
  • Primary Citation of Related Structures:  
    2W2H

  • PubMed Abstract: 
  • The replication of many retroviruses is mediated by a transcriptional activator protein, Tat, which activates RNA polymerase II at the level of transcription elongation. Tat interacts with Cyclin T1 of the positive transcription-elongation factor P-TEFb to recruit the transactivation-response TAR RNA, which acts as a promoter element in the transcribed 5' end of the viral long terminal repeat ...

    The replication of many retroviruses is mediated by a transcriptional activator protein, Tat, which activates RNA polymerase II at the level of transcription elongation. Tat interacts with Cyclin T1 of the positive transcription-elongation factor P-TEFb to recruit the transactivation-response TAR RNA, which acts as a promoter element in the transcribed 5' end of the viral long terminal repeat. Here we present the structure of the cyclin box domain of Cyclin T1 in complex with the Tat protein from the equine infectious anemia virus and its corresponding TAR RNA. The basic RNA-recognition motif of Tat adopts a helical structure whose flanking regions interact with a cyclin T-specific loop in the first cyclin box repeat. Together, both proteins coordinate the stem-loop structure of TAR. Our findings show that Tat binds to a surface on Cyclin T1 similar to where recognition motifs from substrate and inhibitor peptides were previously found to interact within Cdk-cyclin pairs.


    Organizational Affiliation

    Max-Planck-Institut für molekulare Physiologie, Abteilung Physikalische Biochemie, Otto-Hahn-Strasse 11, 44227 Dortmund, Germany.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CYCLIN-T1 AB264Equus caballusMutation(s): 0 
Gene Names: CCNT1
Find proteins for Q9XT26 (Equus caballus)
Explore Q9XT26 
Go to UniProtKB:  Q9XT26
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN TAT CD29Equine infectious anemia virusMutation(s): 0 
Find proteins for P20920 (Equine infectious anemia virus (strain Wyoming))
Explore P20920 
Go to UniProtKB:  P20920
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsLengthOrganismImage
5'-R(*GP*CP*UP*CP*AP*GP*AP*UP*CP*UP *GP*CP*GP*GP*UP*CP*UP*GP*AP*GP*C)-3'R, S22Equine infectious anemia virus
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

Download Ideal Coordinates CCD File 
A, R
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.25 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.243 
  • R-Value Observed: 0.245 
  • Space Group: I 4
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 149.46α = 90
b = 149.46β = 90
c = 129.75γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2008-10-30 
  • Released Date: 2008-12-09 
  • Deposition Author(s): Anand, K., Geyer, M.

Revision History  (Full details and data files)

  • Version 1.0: 2008-12-09
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance