2KLW

Solution structure of an abc collagen heterotrimer reveals a single-register helix stabilized by electrostatic interactions


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 300 
  • 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

Solution structure of an ABC collagen heterotrimer reveals a single-register helix stabilized by electrostatic interactions.

Fallas, J.A.Gauba, V.Hartgerink, J.D.

(2009) J.Biol.Chem. 284: 26851-26859

  • DOI: 10.1074/jbc.M109.014753

  • PubMed Abstract: 
  • Collagen, known for its structural role in tissues and also for its participation in the regulation of homeostatic and pathological processes in mammals, is assembled from triple helices that can be either homotrimers or heterotrimers. High resolutio ...

    Collagen, known for its structural role in tissues and also for its participation in the regulation of homeostatic and pathological processes in mammals, is assembled from triple helices that can be either homotrimers or heterotrimers. High resolution structural information for natural collagens has been difficult to obtain because of their size and the heterogeneity of their native environment. For this reason, peptides that self-assemble into collagen-like triple helices are used to gain insight into the structure, stability, and biochemistry of this important protein family. Although many of the most common collagens in humans are heterotrimers, almost all studies of collagen helices have been on homotrimers. Here we report the first structure of a collagen heterotrimer. Our structure, obtained by solution NMR, highlights the role of electrostatic interactions as stabilizing factors within the triple helical folding motif. This addresses an issue that has been actively researched because of the predominance of charged residues in the collagen family. We also find that it is possible to selectively form a collagen heterotrimer with a well defined composition and register of the peptide chains within the helix, based on information encoded solely in the collagenous domain. Globular domains are implicated in determining the composition of several collagen types, but it is unclear what their role in controlling register may be. We show that is possible to design peptides that not only selectively choose a composition but also a specific register without the assistance of other protein constructs. This mechanism may be used in nature as well.


    Organizational Affiliation

    Department of Chemistry and Bioengineering, Rice University, Houston, Texas 77005, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
(PKG)10
A
32N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
(DOG)10
B
32N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
(POG)10
C
32N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Modified Residues  3 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A, B, C
NON-POLYMERH2 N

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HYP
Query on HYP
B, C
L-PEPTIDE LINKINGC5 H9 N O3PRO
ACE
Query on ACE
A, B, C
NON-POLYMERC2 H4 O

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Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 300 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-07-21
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance