1BH7

A LOW ENERGY STRUCTURE FOR THE FINAL CYTOPLASMIC LOOP OF BAND 3, NMR, MINIMIZED AVERAGE STRUCTURE


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 15 
  • Conformers Submitted: 
  • Selection Criteria: AVERAGE STRUCTURE- ONLY THE THREE STRUCTURED REGIONS WITHIN THE PEPTIDE ARE GIVEN 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

NMR solution structure of a cytoplasmic surface loop of the human red cell anion transporter, band 3.

Askin, D.Bloomberg, G.B.Chambers, E.J.Tanner, M.J.

(1998) Biochemistry 37: 11670-11678

  • DOI: 10.1021/bi973158d

  • PubMed Abstract: 
  • The membrane domain of the human red cell anion transport protein, band 3, is too large to be studied by solution nuclear magnetic resonance spectroscopy (NMR), and its amphiphilic nature requires the use of detergents for solubilization. An alternat ...

    The membrane domain of the human red cell anion transport protein, band 3, is too large to be studied by solution nuclear magnetic resonance spectroscopy (NMR), and its amphiphilic nature requires the use of detergents for solubilization. An alternative approach is to divide the protein into smaller (trans-membrane or surface loop) domains for NMR study. We report the structure of a 46-residue synthetic peptide that corresponds to the cytoplasmic surface loop connecting the putative 12th and 13th trans-membrane spans (residues 796-841) in the 14 span model of band 3. This peptide was shown by circular dichroism (CD) to be 38% helical in 30% trifluoroacetic acid. Two regions of helix (one close to the N-terminus of the peptide and one close to the C-terminus of the peptide) were identified by NMR. Long-range nuclear Overhauser effect (NOE) cross-peaks showed the two helices to be in near proximity. The helices were separated by a proline-rich loop that exhibited local order but was mobile with respect to the rest of the peptide. We discuss how the NMR structure of this loop fits the current models of band 3 structure and topology and the results of recent mutagenesis experiments. A cyclic version of this peptide was synthesized and studied by CD, but NMR studies were not possible due to the low solubility of this peptide.


    Organizational Affiliation

    Department of Biochemistry, School of Medical Sciences, Bristol University, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BAND 3
A
33Homo sapiensMutation(s): 0 
Gene Names: SLC4A1 (AE1, DI, EPB3)
Find proteins for P02730 (Homo sapiens)
Go to Gene View: SLC4A1
Go to UniProtKB:  P02730
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 15 
  • Conformers Submitted: 
  • Selection Criteria: AVERAGE STRUCTURE- ONLY THE THREE STRUCTURED REGIONS WITHIN THE PEPTIDE ARE GIVEN 
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-11-04
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance