1HWU

STRUCTURE OF PII PROTEIN FROM HERBASPIRILLUM SEROPEDICAE

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.203 

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This is version 1.2 of the entry. See complete history. 


Literature

Herbaspirillum seropedicae signal transduction protein PII is structurally similar to the enteric GlnK.

Machado Benelli, E., Buck, M., Polikarpov, I., Maltempi de Souza, E., Cruz, L.M., Pedrosa, F.O.

(2002) Eur J Biochem 269: 3296-3303

  • DOI: 10.1046/j.1432-1033.2002.03011.x
  • Primary Citation of Related Structures:  
    1HWU

  • PubMed Abstract: 

    • PII-like proteins are signal transduction proteins found in bacteria, archaea and eukaryotes. They mediate a variety of cellular responses. A second PII-like protein, called GlnK, has been found in several organisms. In the diazotroph Herbaspirillum seropedicae, PII protein is involved in sensing nitrogen levels and controlling nitrogen fixation genes ...

    PII-like proteins are signal transduction proteins found in bacteria, archaea and eukaryotes. They mediate a variety of cellular responses. A second PII-like protein, called GlnK, has been found in several organisms. In the diazotroph Herbaspirillum seropedicae, PII protein is involved in sensing nitrogen levels and controlling nitrogen fixation genes. In this work, the crystal structure of the unliganded H. seropedicae PII was solved by X-ray diffraction. H. seropedicae PII has a Gly residue, Gly108 preceding Pro109 and the main-chain forms a beta turn. The glycine at position 108 allows a bend in the C-terminal main-chain, thereby modifying the surface of the cleft between monomers and potentially changing function. The structure suggests that the C-terminal region of PII proteins may be involved in specificity of function, and nonenteric diazotrophs are found to have the C-terminal consensus XGXDAX(107-112). We are also proposing binding sites for ATP and 2-oxoglutarate based on the structural alignment of PII with PII-ATP/GlnK-ATP, 5-carboxymethyl-2-hydroxymuconate isomerase and 4-oxalocrotonate tautomerase bound to the inhibitor 2-oxo-3-pentynoate.

    Organizational Affiliation: 

    Department of Biochemistry, Universidade Federal do Paraná, C. Postal 19046, Curitiba, Brazil. benelli@bio.ufpr.br



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PII PROTEINA, B, C, D, E, F112Herbaspirillum seropedicaeMutation(s): 0 
Gene Names: glnB, DFO49_1598, EJD96_09215
Find proteins for P94852 (Herbaspirillum seropedicae)
Explore P94852 
Go to UniProtKB:  P94852
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.203 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.41α = 90
b = 82.32β = 90
c = 100.95γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-06-17
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance