3GFH

Crystal structure of EUTL shell protein of the bacterial ethanolamine micrompartment


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.223 

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This is version 1.1 of the entry. See complete history

Literature

Crystal structure of the EutL shell protein of the ethanolamine ammonia lyase microcompartment

Sagermann, M.Ohtaki, A.Nikolakakis, K.

(2009) Proc.Natl.Acad.Sci.USA 106: 8883-8887

  • DOI: 10.1073/pnas.0902324106
  • Also Cited By: 3MPY, 3MPW, 3MPV

  • PubMed Abstract: 
  • Bacterial microcompartments (BMCs) are specialized organelles that use proteinaceous membranes to confine chemical reaction spaces. The ethanolamine ammonialyase microcompartment of Escherichia coli represents such a class of cytosolic organelles tha ...

    Bacterial microcompartments (BMCs) are specialized organelles that use proteinaceous membranes to confine chemical reaction spaces. The ethanolamine ammonialyase microcompartment of Escherichia coli represents such a class of cytosolic organelles that enables bacteria to survive on small organic molecules such as ethanolamine as the sole source for carbon and nitrogen. We present here the crystal structure of the shell protein EutL at 2.2-A resolution. With 219 residues, it is the largest representative of this BMC's shell proteins. In the crystal, EutL forms a trimer that exhibits a hexagonally shaped tile structure. The tiles arrange into a tightly packed 2D array that is likely to resemble the proteinaceous membrane of the intact BMC. In contrast to other BMC shell proteins, which have only 1 pore per tile, EutL exhibits 3 pores per tile, thereby significantly increasing the overall porosity of this protein membrane. Each of the individual pores is lined with negatively charged residues and aromatic residues that are proposed to facilitate passive transport of specific solutes. The characteristic shape of the hexagonal tile, which is also found in the microcompartments of carbon-fixating bacteria, may present an inherent and fundamental building unit that may provide a general explanation for the formation of differently sized microcompartments.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106, USA. sagermann@chem.ucsb.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ethanolamine utilization protein eutL
A, B
225Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: eutL (yffJ)
Find proteins for P76541 (Escherichia coli (strain K12))
Go to UniProtKB:  P76541
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HG
Query on HG

Download SDF File 
Download CCD File 
A, B
MERCURY (II) ION
Hg
BQPIGGFYSBELGY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.223 
  • Space Group: P 3
Unit Cell:
Length (Å)Angle (°)
a = 67.384α = 90.00
b = 67.384β = 90.00
c = 79.661γ = 120.00
Software Package:
Software NamePurpose
ANDdata scaling
ADSCdata collection
ANDdata reduction
REFMACrefinement
SOLVEphasing

Structure Validation

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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