1TTU

Crystal Structure of CSL bound to DNA

• PDB DOI: https://doi.org/10.2210/pdb1TTU/pdb
• NAKB: 1TTU

• Classification: TRANSCRIPTION
• Organism(s): Caenorhabditis elegans
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2004-06-23 Released: 2004-08-31 
• Deposition Author(s): Kovall, R.A., Hendrickson, W.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.85 Å
• R-Value Free: 0.273 
• R-Value Work: 0.201 
• R-Value Observed: 0.201 

Literature

Crystal structure of the nuclear effector of Notch signaling, CSL, bound to DNA

Kovall, R.A., Hendrickson, W.A.

(2004) EMBO J 23: 3441-3451

• PubMed: 15297877 
• DOI: https://doi.org/10.1038/sj.emboj.7600349
• Primary Citation of Related Structures:  
  1TTU


• PubMed Abstract: 
  

  Notch signaling is a conserved pathway of communication between neighboring cells that results in cell fate specification, and CSL is the universal transcriptional effector of Notch signaling. The Notch intracellular domain translocates to the nucleus after proteolytic release upon Notch extracellular engagement, and there it displaces corepressors from DNA-bound CSL and recruits activators of Notch target genes. Here we report the 2.85 A crystal structure of CSL with a target DNA. CSL comprises three structurally integrated domains: its amino (NTD)- and carboxy (CTD)-terminal domains are strikingly similar to those of Rel transcription factors, but a surprising beta-trefoil domain (BTD) is inserted between them. CSL-bound DNA is recognized specifically by conserved residues from NTD and BTD. A hydrophobic pocket on BTD is identified as the likely site of Notch interaction with CSL, which has functional implications for the mechanism of Notch signaling.

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Organizational Affiliation: 

Department of Biochemistry and Molecular Biophysics, Howard Hughes Medical Institute, Columbia University, New York, NY 10032, USA.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 63.5 kDa 
• Atom Count: 4,163 
• Modelled Residue Count: 465 
• Deposited Residue Count: 507 
• Unique protein chains: 1
• Unique nucleic acid chains: 2

Macromolecules

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
lin-12 And Glp-1 transcriptional regulator	C [auth A]	477	Caenorhabditis elegans	Mutation(s): 0  Gene Names: lag-1
UniProt
Find proteins for V6CLJ5 (Caenorhabditis elegans) Explore V6CLJ5  Go to UniProtKB:  V6CLJ5

Entity ID: 1
Molecule	Chains	Length	Organism	Image
5'-D(*TP*TP*AP*CP*TP*GP*TP*GP*GP*GP*AP*AP*AP*GP*A)-3'	A [auth B]	15	N/A

Entity ID: 2
Molecule	Chains	Length	Organism	Image
5'-D(*AP*AP*TP*CP*TP*TP*TP*CP*CP*CP*AP*CP*AP*GP*T)-3'	B [auth C]	15	N/A

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
EDO	D [auth A], E [auth A], F [auth A], G [auth A], H [auth A], I [auth A], J [auth A], K [auth A], L [auth A]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.85 Å
• R-Value Free: 0.273 
• R-Value Work: 0.201 
• R-Value Observed: 0.201 
• Space Group: P 6₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 127.547	α = 90
b = 127.547	β = 90
c = 97.604	γ = 120

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
SHARP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-08-31 
Deposition Author(s): Kovall, R.A., Hendrickson, W.A.

Revision History  

• Version 1.0: 2004-08-31
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-14
  Changes: Data collection, Database references, Derived calculations