Macromolecule Content

• Total Structure Weight: 8.96 kDa 
• Atom Count: 631 
• Residue Count: 81 
• Unique protein chains: 1

1GHH

SOLUTION STRUCTURE OF DINI

• DOI: 10.2210/pdb1GHH/pdb
• Entry: 1GHH supersedes: 1F0A

• Classification: PROTEIN BINDING
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2000-12-19 Released: 2001-01-10 
• Deposition Author(s): Ramirez, B.E., Voloshin, O.N., Camerini-Otero, R.D., Bax, A.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 30 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Solution structure of DinI provides insight into its mode of RecA inactivation.

Ramirez, B.E., Voloshin, O.N., Camerini-Otero, R.D., Bax, A.

(2000) Protein Sci 9: 2161-2169

• PubMed: 11152126 
• DOI: 10.1110/ps.9.11.2161
• Primary Citation of Related Structures:  
  1GHH


• PubMed Abstract: 
  

The Escherichia coli RecA protein triggers both DNA repair and mutagenesis in a process known as the SOS response. The 81-residue E. coli protein DinI inhibits activity of RecA in vivo. The solution structure of DinI has been determined by multidimensional triple resonance NMR spectroscopy, using restraints derived from two sets of residual dipolar couplings, obtained in bicelle and phage media, supplemented with J couplings and a moderate number of NOE restraints. DinI has an alpha/beta fold comprised of a three-stranded beta-sheet and two alpha-helices. The beta-sheet topology is unusual: the central strand is flanked by a parallel and an antiparallel strand and the sheet is remarkably flat. The structure of DinI shows that six negatively charged Glu and Asp residues on DinI's kinked C-terminal alpha-helix form an extended, negatively charged ridge. We propose that this ridge mimics the electrostatic character of the DNA phospodiester backbone, thereby enabling DinI to compete with single-stranded DNA for RecA binding. Biochemical data confirm that DinI is able to displace ssDNA from RecA.

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Organizational Affiliation: 

Laboratory of Chemical Physics, National Institutes of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892-0520, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
DNA-DAMAGE-INDUCIBLE PROTEIN I	A	81	Escherichia coli	Mutation(s): 0
Find proteins for P0ABR1 (Escherichia coli (strain K12)) Explore P0ABR1  Go to UniProtKB:  P0ABR1

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 30 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 1GHH Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-12-19 
• Released Date: 2001-01-10 
Deposition Author(s): Ramirez, B.E., Voloshin, O.N., Camerini-Otero, R.D., Bax, A.
• This entry supersedes: 1F0A

Revision History 

• Version 1.0: 2001-01-10
  Type: Initial release
  
• Version 1.1: 2008-04-26
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance