2N2E

NMR solution structure of the C-terminal domain of NisI, a lipoprotein from Lactococcus lactis which confers immunity against nisin


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

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This is version 1.2 of the entry. See complete history


Literature

The Solution Structure of the Lantibiotic Immunity Protein NisI and Its Interactions with Nisin.

Hacker, C.Christ, N.A.Duchardt-Ferner, E.Korn, S.Gobl, C.Berninger, L.Dusterhus, S.Hellmich, U.A.Madl, T.Kotter, P.Entian, K.D.Wohnert, J.

(2015) J Biol Chem 290: 28869-28886

  • DOI: 10.1074/jbc.M115.679969
  • Primary Citation of Related Structures:  
    2N32, 2N2E

  • PubMed Abstract: 
  • Many Gram-positive bacteria produce lantibiotics, genetically encoded and posttranslationally modified peptide antibiotics, which inhibit the growth of other Gram-positive bacteria. To protect themselves against their own lantibiotics these bacteria ...

    Many Gram-positive bacteria produce lantibiotics, genetically encoded and posttranslationally modified peptide antibiotics, which inhibit the growth of other Gram-positive bacteria. To protect themselves against their own lantibiotics these bacteria express a variety of immunity proteins including the LanI lipoproteins. The structural and mechanistic basis for LanI-mediated lantibiotic immunity is not yet understood. Lactococcus lactis produces the lantibiotic nisin, which is widely used as a food preservative. Its LanI protein NisI provides immunity against nisin but not against structurally very similar lantibiotics from other species such as subtilin from Bacillus subtilis. To understand the structural basis for LanI-mediated immunity and their specificity we investigated the structure of NisI. We found that NisI is a two-domain protein. Surprisingly, each of the two NisI domains has the same structure as the LanI protein from B. subtilis, SpaI, despite the lack of significant sequence homology. The two NisI domains and SpaI differ strongly in their surface properties and function. Additionally, SpaI-mediated lantibiotic immunity depends on the presence of a basic unstructured N-terminal region that tethers SpaI to the membrane. Such a region is absent from NisI. Instead, the N-terminal domain of NisI interacts with membranes but not with nisin. In contrast, the C-terminal domain specifically binds nisin and modulates the membrane affinity of the N-terminal domain. Thus, our results reveal an unexpected structural relationship between NisI and SpaI and shed light on the structural basis for LanI mediated lantibiotic immunity.


    Organizational Affiliation

    From the Institute for Molecular Biosciences and the Center of Biomolecular Magnetic Resonance (BMRZ), Goethe University, 60438 Frankfurt am Main, Germany, woehnert@bio.uni-frankfurt.de.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Nisin immunity proteinA129Lactococcus lactis subsp. lactisMutation(s): 0 
Gene Names: nisI
Find proteins for P42708 (Lactococcus lactis subsp. lactis)
Explore P42708 
Go to UniProtKB:  P42708
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 
  • OLDERADO: 2N2E Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-10-21
    Type: Initial release
  • Version 1.1: 2015-12-09
    Changes: Database references
  • Version 1.2: 2016-04-27
    Changes: Structure summary