1CJG

NMR STRUCTURE OF LAC REPRESSOR HP62-DNA COMPLEX

• PDB DOI: https://doi.org/10.2210/pdb1CJG/pdb
• BMRB: 4813
• NAKB: 1CJG

• Classification: TRANSCRIPTION/DNA
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1999-04-14 Released: 2000-01-01 
• Deposition Author(s): Spronk, C.A.E.M., Bonvin, A.M.J.J., Radha, P.K., Melacini, G., Boelens, R., Kaptein, R.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 14 
• Conformers Submitted: 11 
• Selection Criteria: SEE ARTICLE 

Literature

The solution structure of Lac repressor headpiece 62 complexed to a symmetrical lac operator.

Spronk, C.A., Bonvin, A.M., Radha, P.K., Melacini, G., Boelens, R., Kaptein, R.

(1999) Structure 7: 1483-1492

• PubMed: 10647179 
• DOI: https://doi.org/10.1016/s0969-2126(00)88339-2
• Primary Citation of Related Structures:  
  1CJG


• PubMed Abstract: 
  

  Lactose repressor protein (Lac) controls the expression of the lactose metabolic genes in Escherichia coli by binding to an operator sequence in the promoter of the lac operon. Binding of inducer molecules to the Lac core domain induces changes in tertiary structure that are propagated to the DNA-binding domain through the connecting hinge region, thereby reducing the affinity for the operator. Protein-protein and protein-DNA interactions involving the hinge region play a crucial role in the allosteric changes occurring upon induction, but have not, as yet, been analyzed in atomic detail.

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Organizational Affiliation: 

Bijvoet Center for Biomolecular Research, Utrecht University, The Netherlands.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 27.14 kDa 
• Atom Count: 1,852 
• Modelled Residue Count: 168 
• Deposited Residue Count: 168 
• Unique protein chains: 1
• Unique nucleic acid chains: 1

Macromolecules

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (LAC REPRESSOR)	C [auth A], D [auth B]	62	Escherichia coli	Mutation(s): 0  Gene Names: LAC I, THE PART ENCODING THE 62 N-TERMINAL AMINOACIDS
UniProt
Find proteins for P03023 (Escherichia coli (strain K12)) Explore P03023  Go to UniProtKB:  P03023

Entity ID: 1
Molecule	Chains	Length	Organism	Image
DNA (5'-D(*GP*AP*AP*TP*TP*GP*TP*GP*AP*GP*CP*GP*CP*TP*CP*AP*CP*AP*AP*TP*TP*C)-3')	A [auth C], B [auth D]	22	N/A

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 14 
• Conformers Submitted: 11 
• Selection Criteria: SEE ARTICLE 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2000-01-01 
Deposition Author(s): Spronk, C.A.E.M., Bonvin, A.M.J.J., Radha, P.K., Melacini, G., Boelens, R., Kaptein, R.

Revision History  

• Version 1.0: 2000-01-01
  Type: Initial release
  
• Version 1.1: 2008-04-26
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2019-11-27
  Changes: Database references, Derived calculations
• Version 1.4: 2023-12-27
  Changes: Data collection, Database references