2B5A

C.BclI, Control Element of the BclI Restriction-Modification System

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.543 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.165 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history. 

Literature

Crystal Structure of the Restriction-Modification System Control Element C.BclI and Mapping of Its Binding Site.

Sawaya, M.R., Zhu, Z., Mersha, F., Chan, S.H., Dabur, R., Xu, S.Y., Balendiran, G.K.

(2005) Structure 13: 1837-1847

  • DOI: 10.1016/j.str.2005.08.017

  • PubMed Abstract: 

    • Protection from DNA invasion is afforded by restriction-modification systems in many bacteria. The efficiency of protection depends crucially on the relative expression levels of restriction versus methytransferase genes. This regulation is provided ...

    Protection from DNA invasion is afforded by restriction-modification systems in many bacteria. The efficiency of protection depends crucially on the relative expression levels of restriction versus methytransferase genes. This regulation is provided by a controller protein, named C protein. Studies of the Bcll system in E. coli suggest that C.Bcll functions as a negative regulator for M.Bcll expression, implying that it plays a role in defense against foreign DNA during virus infection. C.Bcll binds (Kd = 14.3 nM) to a 2-fold symmetric C box DNA sequence that overlaps with the putative -35 promoter region upstream of the bcllM and bcllC genes. The C.Bcll fold comprises five alpha helices: two helices form a helix-turn-helix motif, and the remaining three helices form the extensive dimer interface. The C.Bcll-DNA model proposed suggests that DNA bending might play an important role in gene regulation, and that Glu27 and Asp31 in C.Bcll might function critically in the regulation.

    Organizational Affiliation: 

    UCLA-DOE Laboratory of Structural Biology and Molecular Medicine, 205 Boyer Hall, Box 951570, Los Angeles, California 90095, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
C.BclI
A, B, C, D
77N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACY
Query on ACY
Download SDF File 
Download CCD File 
A, D
ACETIC ACID
C2 H4 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.543 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.165 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 63.205α = 90.00
b = 65.016β = 90.00
c = 73.296γ = 90.00
Software Package:
Software NamePurpose
Blu-Icedata collection
MLPHAREphasing
DENZOdata reduction
REFMACrefinement
DMphasing
SCALEPACKdata scaling
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-01-03
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.3: 2017-10-11
    Type: Refinement description