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 

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

  • 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-T ...

    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: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CYCLIN-T1
A, B
264Equus caballusMutation(s): 0 
Gene Names: CCNT1
Find proteins for Q9XT26 (Equus caballus)
Go to Gene View: CCNT1
Go to UniProtKB:  Q9XT26
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PROTEIN TAT
C, D
29Equine infectious anemia virus (strain Wyoming)Mutation(s): 0 
Gene Names: tat
Find proteins for P20920 (Equine infectious anemia virus (strain Wyoming))
Go to UniProtKB:  P20920
Entity ID: 3
MoleculeChainsLengthOrganism
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 SDF File 
Download 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 
  • Space Group: I 4
Unit Cell:
Length (Å)Angle (°)
a = 149.460α = 90.00
b = 149.460β = 90.00
c = 129.750γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
PHASERphasing
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

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

Revision History 

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