Macromolecule Content

• Total Structure Weight: 12.73 kDa 
• Atom Count: 894 
• Residue Count: 110 
• Unique protein chains: 1

1AUU

SOLUTION STRUCTURE OF THE RNA-BINDING DOMAIN OF THE ANTITERMINATOR PROTEIN SACY, NMR, 10 STRUCTURES

• DOI: 10.2210/pdb1AUU/pdb
• BMRB: 4095

• Classification: TRANSCRIPTION REGULATION
• Organism(s): Bacillus subtilis
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 1997-09-02 Released: 1997-11-12 
• Deposition Author(s): Kochoyan, M.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 40 
• Conformers Submitted: 10 
• Selection Criteria: RESTRAINT ENERGY VIOLATION WITHIN 30% OF THE CONFORMER OF LOWER ENERGY VIOLATION. 28 CONFORMERS SATISFIED THE CRITERIA, ONLY 10 ARE SHOWN. 

Literature

From genetic to structural characterization of a new class of RNA-binding domain within the SacY/BglG family of antiterminator proteins.

Manival, X., Yang, Y., Strub, M.P., Kochoyan, M., Steinmetz, M., Aymerich, S.

(1997) EMBO J 16: 5019-5029

• PubMed: 9305643 
• DOI: 10.1093/emboj/16.16.5019
• Primary Citation of Related Structures:  
  1AUU


• PubMed Abstract: 
  

SacY is the prototype of a family of regulatory proteins able to prevent transcription termination. It interacts with a 29 nucleotide RNA sequence able to fold into a stem-loop structure and partially overlapping with a terminator sequence located in the 5' leader mRNA region of the gene it controls. We show here that the N-terminal fragment of SacY, SacY(1-55), and the corresponding fragments of other members of the family have antiterminator activities with efficiency and specificity identical to those of the full-length proteins. In vitro, this activity correlates with the specific affinity of SacY(1-55) for its RNA target. UV melting experiments demonstrate that SacY(1-55) binding stabilizes the RNA target structure. The NMR solution structure of SacY(1-55) is very similar to that obtained in the crystal (van Tilbeurgh et al., 1997): the peptide is folded as a symmetrical dimer without any structural homology with other RNA-binding domains yet characterized. According to a preliminary NMR analysis of the SacY(1-55)-RNA complex, the protein dimer is not disrupted upon RNA binding and several residues implicated in RNA recognition are located at the edge of the dimer interface. This suggests a new mode of protein-RNA interaction.

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Organizational Affiliation: 

CBS, Faculté de Pharmacie, CNRS-UMR9955, INSERM-U414, Université Montpellier, France.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
SACY	A, B	55	Bacillus subtilis	Mutation(s): 0
Find proteins for P15401 (Bacillus subtilis (strain 168)) Explore P15401  Go to UniProtKB:  P15401

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 40 
• Conformers Submitted: 10 
• Selection Criteria: RESTRAINT ENERGY VIOLATION WITHIN 30% OF THE CONFORMER OF LOWER ENERGY VIOLATION. 28 CONFORMERS SATISFIED THE CRITERIA, ONLY 10 ARE SHOWN. 
• OLDERADO: 1AUU Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-09-02 
• Released Date: 1997-11-12 
Deposition Author(s): Kochoyan, M.

Revision History 

• Version 1.0: 1997-11-12
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance