2MPR

MALTOPORIN FROM SALMONELLA TYPHIMURIUM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure of maltoporin from Salmonella typhimurium ligated with a nitrophenyl-maltotrioside.

Meyer, J.E.Hofnung, M.Schulz, G.E.

(1997) J.Mol.Biol. 266: 761-775

  • DOI: 10.1006/jmbi.1996.0823
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The maltodextrin-specific (malto-)porin from Salmonella typhimurium has been crystallized. Its three-dimensional structure was determined at 2.4 A resolution (1 A = 0.1 nm). A comparison with the structure of the homologous porin from Escherichia col ...

    The maltodextrin-specific (malto-)porin from Salmonella typhimurium has been crystallized. Its three-dimensional structure was determined at 2.4 A resolution (1 A = 0.1 nm). A comparison with the structure of the homologous porin from Escherichia coli as well as with the sequences of other related porins showed that there are regions of appreciable sequence and structure variability, despite close overall similarity. The maltoporin structure was analyzed with a bound nitrophenyl-maltotrioside as well as without ligand. Maltotrioside binding had a negligible effect on the polypeptide structure. It binds at the pore eyelet assuming a conformation close to the natural amylose helix.


    Organizational Affiliation

    Institut für Organische Chemie und Biochemie Albert-Ludwigs-Universität, Freiburg im Breisgau Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MALTOPORIN
A, B, C
427Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)Gene Names: lamB (malL)
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: BETA-BARREL
Sub Group: 
Beta-Barrel Membrane Proteins: Porins and Relatives
Protein: 
LamB Maltoporin
Find proteins for P26466 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Go to UniProtKB:  P26466
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
BGC
Query on BGC

Download SDF File 
Download CCD File 
A, B, C
BETA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-VFUOTHLCSA-N
 Ligand Interaction
GLC
Query on GLC

Download SDF File 
Download CCD File 
A, B, C
ALPHA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-DVKNGEFBSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.191 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 124.500α = 90.00
b = 211.800β = 90.00
c = 184.300γ = 90.00
Software Package:
Software NamePurpose
XDSdata scaling
RAVEmodel building
X-PLORphasing
XSCALEdata scaling
X-PLORrefinement
X-PLORmodel building
XDSdata reduction
AMoREphasing
RAVEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-04-01
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-04-04
    Type: Advisory, Data collection