1TLY

Tsx structure


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.01 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.262 
  • R-Value Observed: 0.288 

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This is version 1.3 of the entry. See complete history


Literature

Crystal structure of the bacterial nucleoside transporter Tsx.

Ye, J.Van Den Berg, B.

(2004) EMBO J 23: 3187-3195

  • DOI: 10.1038/sj.emboj.7600330
  • Primary Citation of Related Structures:  
    1TLW, 1TLY, 1TLZ

  • PubMed Abstract: 
  • Tsx is a nucleoside-specific outer membrane (OM) transporter of Gram-negative bacteria. We present crystal structures of Escherichia coli Tsx in the absence and presence of nucleosides. These structures provide a mechanism for nucleoside transport across the bacterial OM ...

    Tsx is a nucleoside-specific outer membrane (OM) transporter of Gram-negative bacteria. We present crystal structures of Escherichia coli Tsx in the absence and presence of nucleosides. These structures provide a mechanism for nucleoside transport across the bacterial OM. Tsx forms a monomeric, 12-stranded beta-barrel with a long and narrow channel spanning the outer membrane. The channel, which is shaped like a keyhole, contains several distinct nucleoside-binding sites, two of which are well defined. The base moiety of the nucleoside is located in the narrow part of the keyhole, while the sugar occupies the wider opening. Pairs of aromatic residues and flanking ionizable residues are involved in nucleoside binding. Nucleoside transport presumably occurs by diffusion from one binding site to the next.


    Organizational Affiliation

    Department of Cell Biology, Howard Hughes Medical Institute and Harvard Medical School, Boston, MA 02115, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Nucleoside-specific channel-forming protein tsxA, B278Escherichia coliMutation(s): 0 
Gene Names: tsxnupAb0411Z0512ECS0464SF0348S0356
Membrane Entity: Yes 
UniProt
Find proteins for P0A927 (Escherichia coli (strain K12))
Explore P0A927 
Go to UniProtKB:  P0A927
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.01 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.262 
  • R-Value Observed: 0.288 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 149.778α = 90
b = 149.778β = 90
c = 120.888γ = 120
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-08-24
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2014-12-17
    Changes: Data collection