1MIW

Crystal structure of Bacillus stearothermophilus CCA-adding enzyme in complex with ATP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.231 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Crystal structures of the Bacillus stearothermophilus CCA-adding enzyme and its complexes with ATP or CTP

Li, F.Xiong, Y.Wang, J.Cho, H.D.Tomita, K.Weiner, A.M.Steitz, T.A.

(2002) Cell 111: 815-824

  • DOI: 10.1016/s0092-8674(02)01115-7
  • Primary Citation of Related Structures:  
    1MIV, 1MIW, 1MIY

  • PubMed Abstract: 
  • CCA-adding enzymes polymerize CCA onto the 3' terminus of immature tRNAs without using a nucleic acid template. The 3.0 A resolution crystal structures of the CCA-adding enzyme from Bacillus stearothermophilus and its complexes with ATP or CTP reveal a seahorse-shaped subunit consisting of four domains: head, neck, body, and tail ...

    CCA-adding enzymes polymerize CCA onto the 3' terminus of immature tRNAs without using a nucleic acid template. The 3.0 A resolution crystal structures of the CCA-adding enzyme from Bacillus stearothermophilus and its complexes with ATP or CTP reveal a seahorse-shaped subunit consisting of four domains: head, neck, body, and tail. The head is structurally homologous to the palm domain of DNA polymerase beta but has additional structural features and functions. The neck, body, and tail represent new protein folding motifs. The neck provides a specific template for the incoming ATP or CTP, whereas the body and tail may bind tRNA. Each subunit has one active site capable of switching its base specificity between ATP and CTP, an important component of the CCA-adding mechanism.


    Organizational Affiliation

    Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
tRNA CCA-adding enzymeA, B404Geobacillus stearothermophilusMutation(s): 0 
Gene Names: cca
EC: 2.7.7.72
UniProt
Find proteins for Q7SIB1 (Geobacillus stearothermophilus)
Explore Q7SIB1 
Go to UniProtKB:  Q7SIB1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ7SIB1
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.231 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.632α = 90
b = 105.632β = 90
c = 184.159γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
MLPHAREphasing
REFMACrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-12-13
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance