6A2H

Architectural roles of Cren7 in folding crenarchaeal chromatin filament


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Architectural roles of Cren7 in folding crenarchaeal chromatin filament.

Zhang, Z.Zhao, M.Chen, Y.Wang, L.Liu, Q.Dong, Y.Gong, Y.Huang, L.

(2018) Mol. Microbiol. --: --

  • DOI: 10.1111/mmi.14173
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Archaea have evolved various strategies in chromosomal organization. While histone homologues exist in most archaeal phyla, Cren7 is a chromatin protein conserved in the Crenarchaeota. Here, we show that Cren7 preferentially binds DNA with AT-rich se ...

    Archaea have evolved various strategies in chromosomal organization. While histone homologues exist in most archaeal phyla, Cren7 is a chromatin protein conserved in the Crenarchaeota. Here, we show that Cren7 preferentially binds DNA with AT-rich sequences over that with GC-rich sequences with a binding size of 6~7 bp. Structural studies of Cren7 in complex with either an 18-bp or a 20-bp double-stranded DNA fragment reveal that Cren7 binds to the minor groove of DNA as monomers in a head-to-tail manner. The neighboring Cren7 monomers are located on the opposite sides of the DNA duplex, with each introducing a single-step sharp kink by intercalation of the hydrophobic side chain of Leu28, bending the DNA into an S-shape conformation. A structural model for the chromatin fiber folded by Cren7 was established and verified by the analysis of cross-linked Cren7-DNA complexes by atomic force microscopy. Our results suggest that Cren7 differs significantly from Sul7, another chromatin protein conserved among Sulfolobus species, in both DNA binding and deformation. These data shed significant light on the strategy of chromosomal DNA organization in crenarchaea.


    Organizational Affiliation

    State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, No. 1 West Beichen Road, Chaoyang District, Beijing, 100101, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Chromatin protein Cren7
A
60Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2)Mutation(s): 0 
Gene Names: creN7
Find proteins for Q97ZE3 (Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2))
Go to UniProtKB:  Q97ZE3
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (5'-D(P*GP*TP*AP*AP*TP*T)-3')B6synthetic construct
Entity ID: 3
MoleculeChainsLengthOrganism
DNA (5'-D(P*AP*AP*TP*TP*AP*C)-3')C6synthetic construct
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.211 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 40.642α = 90.00
b = 40.642β = 90.00
c = 104.850γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
HKL-2000data scaling
HKL-2000data reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2019-01-16
    Type: Initial release