Macromolecule Content

• Total Structure Weight: 13.64 kDa 
• Atom Count: 955 
• Residue Count: 124 
• Unique protein chains: 1

1DC7

STRUCTURE OF A TRANSIENTLY PHOSPHORYLATED "SWITCH" IN BACTERIAL SIGNAL TRANSDUCTION

• DOI: 10.2210/pdb1DC7/pdb
• BMRB: 4527

• Classification: SIGNALING PROTEIN
• Organism(s): Salmonella enterica subsp. enterica serovar Typhimurium
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 1999-11-04 Released: 2000-01-05 
• Deposition Author(s): Kern, D., Volkman, B.F., Luginbuhl, P., Nohaile, M.J., Kustu, S., Wemmer, D.E.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Submitted: 1 

Literature

Structure of a transiently phosphorylated switch in bacterial signal transduction.

Kern, D., Volkman, B.F., Luginbuhl, P., Nohaile, M.J., Kustu, S., Wemmer, D.E.

(1999) Nature 402: 894-898

• PubMed: 10622255 
• DOI: 10.1038/47273
• Primary Citation of Related Structures:  
  1DC7, 1DC8


• PubMed Abstract: 
  

Receiver domains are the dominant molecular switches in bacterial signalling. Although several structures of non-phosphorylated receiver domains have been reported, a detailed structural understanding of the activation arising from phosphorylation has been impeded by the very short half-lives of the aspartylphosphate linkages. Here we present the first structure of a receiver domain in its active state, the phosphorylated receiver domain of the bacterial enhancer-binding protein NtrC (nitrogen regulatory protein C). Nuclear magnetic resonance spectra were taken during steady-state autophosphorylation/dephosphorylation, and three-dimensional spectra from multiple samples were combined. Phosphorylation induces a large conformational change involving a displacement of beta-strands 4 and 5 and alpha-helices 3 and 4 away from the active site, a register shift and an axial rotation in helix 4. This creates an exposed hydrophobic surface that is likely to transmit the signal to the transcriptional activation domain.

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Related Citations: 

• Three-Dimensional Solution Structure of the N-Terminal Receiver Domain of NTRC
  Volkman, B.F., Nohaile, M.J., Amy, N.K., Kustu, S., Wemmer, D.E.
  (1995) Biochemistry 34: 1413

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Organizational Affiliation: 

Department of Biochemistry, Brandeis University, Waltham, Massachusetts 02454, USA. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
NITROGEN REGULATION PROTEIN	A	124	Salmonella enterica subsp. enterica serovar Typhimurium	Mutation(s): 0
Find proteins for P41789 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore P41789  Go to UniProtKB:  P41789

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Submitted: 1 
• OLDERADO: 1DC7 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-11-04 
• Released Date: 2000-01-05 
Deposition Author(s): Kern, D., Volkman, B.F., Luginbuhl, P., Nohaile, M.J., Kustu, S., Wemmer, D.E.

Revision History 

• Version 1.0: 2000-01-05
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance