Crystal structure of a ProM2 containing triple-helical collagen peptide.

Experimental Data Snapshot

  • Resolution: 0.81 Å
  • R-Value Free: 0.136 
  • R-Value Work: 0.128 

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Triple-Helix-Stabilizing Effects in Collagen Model Peptides Containing PPII-Helix-Preorganized Diproline Modules.

Maassen, A.Gebauer, J.M.Theres Abraham, E.Grimm, I.Neudorfl, J.M.Kuhne, R.Neundorf, I.Baumann, U.Schmalz, H.G.

(2020) Angew Chem Int Ed Engl 59: 5747-5755

  • DOI: https://doi.org/10.1002/anie.201914101
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Collagen model peptides (CMPs) serve as tools for understanding stability and function of the collagen triple helix and have a potential for biomedical applications. In the past, interstrand cross-linking or conformational preconditioning of proline units through stereoelectronic effects have been utilized in the design of stabilized CMPs. To further study the effects determining collagen triple helix stability we investigated a series of CMPs containing synthetic diproline-mimicking modules (ProMs), which were preorganized in a PPII-helix-type conformation by a functionalizable intrastrand C 2 bridge. Results of CD-based denaturation studies were correlated with calculated (DFT) conformational preferences of the ProM units, revealing that the relative helix stability is mainly governed by an interplay of main-chain preorganization, ring-flip preference, adaptability, and steric effects. Triple helix integrity was proven by crystal structure analysis and binding to HSP47.

  • Organizational Affiliation

    University of Cologne, Department of Chemistry, Greinstraße 4, 50939, Cologne, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ProM2 containing collagen model peptide.
A, B, C
33synthetic constructMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 0.81 Å
  • R-Value Free: 0.136 
  • R-Value Work: 0.128 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 26.08α = 90
b = 22.85β = 103.83
c = 53.43γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
ARP/wARPmodel building
Cootmodel building

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
German Research FoundationGermanyINST 216/682-1

Revision History  (Full details and data files)

  • Version 1.0: 2020-01-29
    Type: Initial release
  • Version 1.1: 2020-02-12
    Changes: Database references
  • Version 1.2: 2020-04-01
    Changes: Database references
  • Version 2.0: 2023-11-15
    Changes: Atomic model, Data collection, Database references, Derived calculations
  • Version 2.1: 2024-01-24
    Changes: Refinement description