2LGS

FEEDBACK INHIBITION OF FULLY UNADENYLYLATED GLUTAMINE SYNTHETASE FROM SALMONELLA TYPHIMURIUM BY GLYCINE, ALANINE, AND SERINE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Work: 0.235 
  • R-Value Observed: 0.235 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Feedback inhibition of fully unadenylylated glutamine synthetase from Salmonella typhimurium by glycine, alanine, and serine.

Liaw, S.H.Pan, C.Eisenberg, D.

(1993) Proc Natl Acad Sci U S A 90: 4996-5000

  • DOI: 10.1073/pnas.90.11.4996
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Bacterial glutamine synthetase (GS; EC 6.3.1.2) was previously shown to be inhibited by nine end products of glutamine metabolism. Here we present four crystal structures of GS, complexed with the substrate Glu and with each of three feedback inhibit ...

    Bacterial glutamine synthetase (GS; EC 6.3.1.2) was previously shown to be inhibited by nine end products of glutamine metabolism. Here we present four crystal structures of GS, complexed with the substrate Glu and with each of three feedback inhibitors. The GS of the present study is from Salmonella typhimurium, with Mn2+ ions bound, and is fully unadenylylated. From Fourier difference maps, we find that L-serine, L-alanine, and glycine bind at the site of the substrate L-glutamate. In our model, these four amino acids bind with the atoms they share in common (the "main chain" +NH3-CH-COO-) in the same positions. Thus on the basis of our x-ray work, glycine, alanine, and serine appear to inhibit GS-Mn by competing with the substrate glutamate for the active site.


    Related Citations: 
    • Refined Atomic Model of Glutamine Synthetase at 3.5 Angstroms Resolution
      Yamashita, M.M., Almassy, R.J., Janson, C.A., Cascio, D., Eisenberg, D.
      (1989) J Biol Chem 264: 17681
    • Novel Subunit-Subunit Interactions in the Structure of Glutamine Synthetase
      Almassy, R.J., Janson, C.A., Hamlin, R., Xuong, N.-H., Eisenberg, D.
      (1986) Nature 323: 304

    Organizational Affiliation

    Molecular Biology Institute, University of California, Los Angeles 90024.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GLUTAMINE SYNTHETASE
A, B, C, D, E, F, G, H, I, J, K, L
468Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 0 
EC: 6.3.1.2
Find proteins for P0A1P6 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Go to UniProtKB:  P0A1P6
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GLU
Query on GLU

Download CCD File 
A, B, C, D, E, F, G, H, I, J, K, L
GLUTAMIC ACID
C5 H9 N O4
WHUUTDBJXJRKMK-VKHMYHEASA-N
 Ligand Interaction
MN
Query on MN

Download CCD File 
A, B, C, D, E, F, G, H, I, J, K, L
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Work: 0.235 
  • R-Value Observed: 0.235 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 235.5α = 90
b = 134.5β = 102.8
c = 200.1γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-11-30
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance