Solution NMR structure of the outer membrane enzyme PagP in OG micelles

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 250 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

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This is version 1.3 of the entry. See complete history


Solution Structure and Dynamics of the Outer Membrane Enzyme PagP by NMR

Hwang, P.M.Choy, W.-Y.Lo, E.I.Chen, L.Forman-Kay, J.D.Raetz, C.R.H.Prive, G.G.Bishop, R.E.Kay, L.E.

(2002) Proc Natl Acad Sci U S A 99: 13560-13565

  • DOI: https://doi.org/10.1073/pnas.212344499
  • Primary Citation of Related Structures:  
    1MM4, 1MM5

  • PubMed Abstract: 

    The bacterial outer membrane enzyme PagP transfers a palmitate chain from a phospholipid to lipid A. In a number of pathogenic Gram-negative bacteria, PagP confers resistance to certain cationic antimicrobial peptides produced during the host innate immune response. The global fold of Escherichia coli PagP was determined in both dodecylphosphocholine and n-octyl-beta-d-glucoside detergent micelles using solution NMR spectroscopy. PagP consists of an eight-stranded anti-parallel beta-barrel preceded by an amphipathic alpha helix. The beta-barrel is well defined, whereas NMR relaxation measurements reveal considerable mobility in the loops connecting individual beta-strands. Three amino acid residues critical for enzymatic activity localize to extracellular loops near the membrane interface, positioning them optimally to interact with the polar headgroups of lipid A. Hence, the active site of PagP is situated on the outer surface of the outer membrane. Because the phospholipids that donate palmitate in the enzymatic reaction are normally found only in the inner leaflet of the outer membrane, PagP activity may depend on the aberrant migration of phospholipids into the outer leaflet. This finding is consistent with an emerging paradigm for outer membrane enzymes in providing an adaptive response toward disturbances in the outer membrane.

  • Organizational Affiliation

    Departments of Biochemistry, Medical Genetics and Microbiology, Laboratory Medicine and Pathobiology, and Chemistry, University of Toronto, Toronto, Ontario, Canada M5S 1A8.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
CrcA protein170Escherichia coliMutation(s): 0 
Gene Names: CrcA
Membrane Entity: Yes 
Find proteins for P37001 (Escherichia coli (strain K12))
Explore P37001 
Go to UniProtKB:  P37001
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP37001
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 250 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-09-13
    Type: Initial release
  • Version 1.1: 2007-10-21
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-02-23
    Changes: Database references, Derived calculations