1O8T

Global Structure and Dynamics of Human Apolipoprotein CII in Complex with Micelles: Evidence for increased mobility of the helix involved in the activation of lipoprotein lipase


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 68 
  • Selection Criteria: LEAST ENERGY, LEAST RESTRAINT VIOLATION 

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This is version 1.2 of the entry. See complete history


Literature

Global Structure and Dynamics of Human Apolipoprotein Cii in Complex with Micelles: Evidence for Increased Mobility of the Helix Involved in the Activation of Lipoprotein Lipase

Zdunek, J.Martinez, G.V.Schleucher, J.Lycksell, P.O.Yin, Y.Nilsson, S.Shen, Y.Olivecrona, G.Wijmenga, S.

(2003) Biochemistry 42: 1872

  • DOI: 10.1021/bi0267184
  • Primary Citation of Related Structures:  
    1O8T

  • PubMed Abstract: 
  • Apolipoprotein CII (apoCII), a surface constituent of plasma lipoproteins, is the activator for lipoprotein lipase (LPL) and is therefore central for lipid transport in blood. The three-dimensional structure of (13)C-, (15)N-enriched human full-length apoCII in complex with sodium dodecyl sulfate (SDS) micelles is reported ...

    Apolipoprotein CII (apoCII), a surface constituent of plasma lipoproteins, is the activator for lipoprotein lipase (LPL) and is therefore central for lipid transport in blood. The three-dimensional structure of (13)C-, (15)N-enriched human full-length apoCII in complex with sodium dodecyl sulfate (SDS) micelles is reported. In addition to the structure determination, (15)N-relaxation measurements have been performed at two magnetic fields to characterize the dynamics of the backbone of apoCII in the complex. The relaxation data also provided global structural constraints, viz. the orientation of helices in the complex. In addition, global constraints were derived from the fact that apoCII helices are attached to the surface of the SDS micelle and that the hydrophobic moments of each helix faces the interior of the micelle. These three categories of global constraints, together with the local classical NMR constraints, were sufficient to define the 3D structure of the apoCII-SDS micelle complex. To our knowledge, this presents the first example in which the global structure of a protein-SDS micelle complex has been determined. The C-terminal helix of apoCII is known to be responsible for the activation of LPL. This helix is distinguished from the other helices by a higher degree of internal motion on the nanosecond time scale as shown by the relaxation data. The overall structure and the internal dynamics, combined with previous mutation data, give important clues toward a possible mechanism for the activation of LPL by apoCII.


    Organizational Affiliation

    Department of Medical Biochemistry and Biophysics and Medical Biosciences, Physiological Chemistry, Umeå University, SE-901 87 Umeå, Sweden.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
APOLIPOPROTEIN C-IIA79Homo sapiensMutation(s): 0 
Gene Names: APOC2APC2
UniProt & NIH Common Fund Data Resources
Find proteins for P02655 (Homo sapiens)
Explore P02655 
Go to UniProtKB:  P02655
PHAROS:  P02655
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 68 
  • Selection Criteria: LEAST ENERGY, LEAST RESTRAINT VIOLATION 
  • OLDERADO: 1O8T Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-02-27
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance