2JOU

NMR structure of Mini-B, an N-terminal- C-terminal construct from human Surfactant Protein-B (SP-B), in Hexafluoroisopropanol (HFIP)


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of mini-B, a functional fragment of surfactant protein B, in detergent micelles

Sarker, M.Waring, A.J.Walther, F.J.Keough, K.M.Booth, V.

(2007) Biochemistry 46: 11047-11056

  • DOI: 10.1021/bi7011756

  • PubMed Abstract: 
  • Surfactant protein B (SP-B) is essential for normal lung surfactant function, which is in itself essential to life. However, the molecular basis for SP-B's activity is not understood and a high-resolution structure for SP-B has not been determined. M ...

    Surfactant protein B (SP-B) is essential for normal lung surfactant function, which is in itself essential to life. However, the molecular basis for SP-B's activity is not understood and a high-resolution structure for SP-B has not been determined. Mini-B is a 34-residue peptide with internal disulfide linkages that is composed of the N- and C-terminal helical regions of SP-B. It has been shown to retain similar activity to full-length SP-B in certain in vitro and in vivo studies. We have used solution NMR to determine the structure of Mini-B in the presence of micelles composed of the anionic detergent sodium dodecyl sulfate (SDS). Under these conditions, Mini-B forms two alpha-helices connected by an unstructured loop. Mini-B possesses a strikingly amphipathic surface with a large positively charged patch on one face of the peptide and a large hydrophobic patch on the opposite face. A tryptophan side chain extends outward from the peptide in a position to interact with lipids at the polar/apolar interface. Interhelix interactions are stabilized by both disulfide bonds and by interleaving of hydrophobic side chains from the two helices.


    Organizational Affiliation

    Department of Physics & Physical Oceanography, Memorial University of Newfoundland, St. John's, Newfoundland, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Pulmonary surfactant-associated protein B
A
34Homo sapiensMutation(s): 0 
Gene Names: SFTPB (SFTP3)
Find proteins for P07988 (Homo sapiens)
Go to Gene View: SFTPB
Go to UniProtKB:  P07988
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 15 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2JOU Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-04-10
    Type: Initial release
  • Version 1.1: 2008-02-13
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance