3NCP

GlnK2 from Archaeoglobus fulgidus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Cooperative binding of MgATP and MgADP in the trimeric P(II) protein GlnK2 from Archaeoglobus fulgidus.

Helfmann, S.Lu, W.Litz, C.Andrade, S.L.

(2010) J.Mol.Biol. 402: 165-177

  • DOI: 10.1016/j.jmb.2010.07.020
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • P(II)-like proteins, such as GlnK, found in a wide variety of organisms from prokaryotes to plants constitute a family of cytoplasmic signaling proteins that play a central regulatory role in the assimilation of nitrogen for biosyntheses. They specif ...

    P(II)-like proteins, such as GlnK, found in a wide variety of organisms from prokaryotes to plants constitute a family of cytoplasmic signaling proteins that play a central regulatory role in the assimilation of nitrogen for biosyntheses. They specifically bind and are modulated by effector molecules such as adenosine triphosphate, adenosine diphosphate and 2-oxoglutarate. Their highly conserved, trimeric structure suggests that cooperativity in effector binding might be the basis for the ability to integrate and respond to a wide range of concentrations, but to date no direct quantification of this cooperative behavior has been presented. The hyperthermophilic archaeon Archaeoglobus fulgidus contains three GlnK proteins, functionally associated with ammonium transport proteins (Amt). We have characterized GlnK2 and its interaction with effectors by high-resolution X-ray crystallography and isothermal titration calorimetry. Binding of adenosine nucleotides resulted in distinct, cooperative behavior for ATP and ADP. While 2-oxoglutarate has been shown to interact with other GlnK proteins, GlnK2 was completely insensitive to this key indicator of a low level of intracellular nitrogen. These findings point to different regulation and modulation patterns and add to our understanding of the flexibility and versatility of the GlnK family of signaling proteins.


    Organizational Affiliation

    Institut für organische Chemieund Biochemie, Albert-Ludwigs-Universität Freiburg, Albertstr.21, 79104 Freiburg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Nitrogen regulatory protein P-II (GlnB-2)
A, B, C, D
119Archaeoglobus fulgidus (strain ATCC 49558 / VC-16 / DSM 4304 / JCM 9628 / NBRC 100126)Mutation(s): 0 
Find proteins for O28527 (Archaeoglobus fulgidus (strain ATCC 49558 / VC-16 / DSM 4304 / JCM 9628 / NBRC 100126))
Go to UniProtKB:  O28527
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A, B, C
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.201 
  • Space Group: P 3
Unit Cell:
Length (Å)Angle (°)
a = 91.000α = 90.00
b = 91.000β = 90.00
c = 64.432γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
BUSTERrefinement
DENZOdata reduction
MAR345dtbdata collection
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-07-28
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance