Macromolecule Content

• Total Structure Weight: 9.71 kDa 
• Atom Count: 677 
• Modelled Residue Count: 86 
• Deposited Residue Count: 86 
• Unique protein chains: 1

1SG5

Solution structure of Yaeo, a Rho-specific inhibitor of transcription termination

• DOI: 10.2210/pdb1SG5/pdb

• Classification: STRUCTURAL GENOMICS, TRANSCRIPTION, PROTEIN BINDING
• Organism(s): Escherichia coli
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2004-02-23 Released: 2005-07-12 
• Deposition Author(s): Gutierrez, P., Gehring, K., Montreal-Kingston Bacterial Structural Genomics Initiative (BSGI)

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with favorable non-bond energy 

Literature

Solution Structure of YaeO, a Rho-specific Inhibitor of Transcription Termination

Gutierrez, P., Kozlov, G., Gabrielli, L., Elias, D., Osborne, M.J., Gallouzi, I.E., Gehring, K.

(2007) J Biol Chem 282: 23348-23353

• PubMed: 17565995 
• DOI: 10.1074/jbc.M702010200
• Primary Citation of Related Structures:  
  1SG5


• PubMed Abstract: 
  

Rho-dependent transcription termination is an essential process for the regulation of bacterial gene expression. Thus far, only two Rho-specific inhibitors of bacterial transcription termination have been described, the psu protein from the satellite bacteriophage P4 and YaeO from Escherichia coli. Here, we report the solution structure of YaeO, the first of a Rho-specific inhibitor of transcription termination. YaeO is an acidic protein composed of an N-terminal helix and a seven-stranded beta sandwich. NMR chemical shift perturbation experiments revealed that YaeO binds proximal to the primary nucleic acid binding site of Rho. Based on the NMR titrations, a docked model of the YaeO-Rho complex was calculated. These results suggest that YaeO binds outside the Rho hexamer, acting as a competitive inhibitor of RNA binding. In vitro gel shift assays confirmed the inhibition of nucleic acid binding to Rho. Site-directed mutagenesis showed that the negative character of YaeO is essential for its function in vivo.

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Organizational Affiliation: 

Department of Biochemistry, McGill University, Montreal, Quebec H3G 1Y6, Canada.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
orf, hypothetical protein	A	86	Escherichia coli	Mutation(s): 0  Gene Names: yaeO
Find proteins for P0AFW8 (Escherichia coli (strain K12)) Explore P0AFW8  Go to UniProtKB:  P0AFW8

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with favorable non-bond energy 
• OLDERADO: 1SG5 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-02-23 
• Released Date: 2005-07-12 
Deposition Author(s): Gutierrez, P., Gehring, K., Montreal-Kingston Bacterial Structural Genomics Initiative (BSGI)

Revision History  

• Version 1.0: 2005-07-12
  Type: Initial release
  
• Version 1.1: 2007-10-16
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance