2LX6

Structure of Lasso Peptide Caulosegnin I


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Caulosegnins I-III: A Highly Diverse Group of Lasso Peptides Derived from a Single Biosynthetic Gene Cluster.

Hegemann, J.D.Zimmermann, M.Xie, X.Marahiel, M.A.

(2013) J.Am.Chem.Soc. 135: 210-222

  • DOI: 10.1021/ja308173b

  • PubMed Abstract: 
  • Lasso peptides are natural products of ribosomal origin with a unique knotted structural fold. Even though only a few of them are known, recent reports of newly isolated lasso peptides were scarce. In this work, we report the identification of a nove ...

    Lasso peptides are natural products of ribosomal origin with a unique knotted structural fold. Even though only a few of them are known, recent reports of newly isolated lasso peptides were scarce. In this work, we report the identification of a novel lasso peptide gene cluster from Caulobacter segnis, that produces three new lasso peptides (caulosegnins I, II, and III) using a single biosynthetic machinery. These lasso peptides possess different ring sizes and amino acid sequences. In this study, we have developed a system for enhanced lasso peptide production to allow isolation of these compounds through heterologous expression in Escherichia coli. We were able to elucidate the structure of the most abundant lasso peptide caulosegnin I via NMR spectroscopic analysis and performed a thorough mutational analysis that gave insight into their biosynthesis and revealed important factors affecting the stabilization of the lasso fold in general. The caulosegnins also show a diverse behavior when subjected to thermal denaturation, which is exceptional as all lasso peptides were believed to have an intrinsic high thermal stability.


    Organizational Affiliation

    Department of Chemistry, Biochemistry, Philipps-University Marburg, Hans-Meerwein-Strasse 4 and LOEWE-Centre for Synthetic Microbiology, D-35032, Marburg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Putative uncharacterized protein
A
19Caulobacter segnis (strain ATCC 21756 / DSM 7131 / JCM 7823 / NBRC 15250 / LMG 17158 / TK0059)N/A
Find proteins for D5VKJ9 (Caulobacter segnis (strain ATCC 21756 / DSM 7131 / JCM 7823 / NBRC 15250 / LMG 17158 / TK0059))
Go to UniProtKB:  D5VKJ9
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2LX6 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-12-26
    Type: Initial release
  • Version 1.1: 2013-01-23
    Type: Database references