2NS1

Crystal structure of the e. coli ammonia channel AMTB complexed with the signal transduction protein GLNK


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.96 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.164 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Inhibitory complex of the transmembrane ammonia channel, AmtB, and the cytosolic regulatory protein, GlnK, at 1.96

Gruswitz, F.O'Connell III, J.Stroud, R.M.

(2007) Proc Natl Acad Sci U S A 104: 42-47

  • DOI: 10.1073/pnas.0609796104
  • Primary Citation of Related Structures:  
    2NS1

  • PubMed Abstract: 
  • Ammonia conductance is highly regulated. A P(II) signal transduction protein, GlnK, is the final regulator of transmembrane ammonia conductance by the ammonia channel AmtB in Escherichia coli. The complex formed between AmtB and inhibitory GlnK at 1.96-A resolution shows that the trimeric channel is blocked directly by GlnK and how, in response to intracellular nitrogen status, the ability of GlnK to block the channel is regulated by uridylylation/deuridylylation at Y51 ...

    Ammonia conductance is highly regulated. A P(II) signal transduction protein, GlnK, is the final regulator of transmembrane ammonia conductance by the ammonia channel AmtB in Escherichia coli. The complex formed between AmtB and inhibitory GlnK at 1.96-A resolution shows that the trimeric channel is blocked directly by GlnK and how, in response to intracellular nitrogen status, the ability of GlnK to block the channel is regulated by uridylylation/deuridylylation at Y51. ATP and Mg(2+) augment the interaction of GlnK. The hydrolyzed product, adenosine 5'-diphosphate orients the surface of GlnK for AmtB blockade. 2-Oxoglutarate diminishes AmtB/GlnK association, and sites for 2-oxoglutarate are evaluated.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, Genentech Hall, School of Medicine, University of California, 600 16th Street, San Francisco, CA 94158-2517, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ammonia channelA412Escherichia coli K-12Mutation(s): 0 
Gene Names: amtBybaGb0451JW0441
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Amt/Mep/Rh proteins
Protein: 
AmtB ammonia channel in complex with inhibitory GlnK
Find proteins for P69681 (Escherichia coli (strain K12))
Explore P69681 
Go to UniProtKB:  P69681
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Nitrogen regulatory protein P-II 2B116Escherichia coli K-12Mutation(s): 1 
Gene Names: glnKybaIb0450JW0440
Find proteins for P0AC55 (Escherichia coli (strain K12))
Explore P0AC55 
Go to UniProtKB:  P0AC55
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.96 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.164 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.032α = 90
b = 102.032β = 90
c = 363.849γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
ADSCdata collection
HKL-2000data reduction
SCALEPACKdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-12-26
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Source and taxonomy, Version format compliance
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Data collection, Database references, Derived calculations, Structure summary