2HTJ

NMR structure of E.coli PapI


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 
  • Selection Criteria: 

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This is version 1.2 of the entry. See complete history


Literature

Solution Structure of Escherichia coli PapI, a Key Regulator of the Pap Pili Phase Variation.

Kawamura, T.Le, L.U.Zhou, H.Dahlquist, F.W.

(2007) J Mol Biol 365: 1130-1142

  • DOI: 10.1016/j.jmb.2006.10.066
  • Primary Citation of Related Structures:  
    2HTJ

  • PubMed Abstract: 
  • Pyelonephritis-associated pili (pap) allow uropathogenic Escherichia coli to bind to epithelial cells and play an important role in urinary tract infection. Expression of pap is controlled by a phase-variation mechanism, based on the two distinct heritable states that are the result of adenine N6-methylation in either of the two GATC sequences in its regulatory region ...

    Pyelonephritis-associated pili (pap) allow uropathogenic Escherichia coli to bind to epithelial cells and play an important role in urinary tract infection. Expression of pap is controlled by a phase-variation mechanism, based on the two distinct heritable states that are the result of adenine N6-methylation in either of the two GATC sequences in its regulatory region. The methylation status of these two sequences is sensed by the action of two proteins, Lrp and PapI, and they play a central role in determining pap gene expression in both phase-ON and phase-OFF cells. We used modern NMR techniques to determine the solution structure and backbone dynamics of PapI. We found its overall fold resembles closely that of the winged helix-turn-helix family of DNA-binding proteins. We determined that PapI possesses its own DNA-binding activity, albeit non-sequence-specific, independent of Lrp. PapI appears to bind to DNA with a K(d) in the 10 microM range. Possible mechanisms by which PapI might participate in the regulation of the pap operon are discussed in light of these new findings.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California Santa Barbara, CA 93106-9510, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
P fimbrial regulatory protein KS71AA81Escherichia coliMutation(s): 0 
Gene Names: KS71ApapI_2
Find proteins for P62584 (Escherichia coli)
Explore P62584 
Go to UniProtKB:  P62584
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 
  • Selection Criteria: 
  • OLDERADO: 2HTJ Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-01-30
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance