6GB0

The Structure of variant K294A of the Mo-insertase domain Cnx1E from Arabidopsis thaliana in complex with AMP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.81 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.190 

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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

The functional principle of eukaryotic molybdenum insertases.

Krausze, J.Hercher, T.W.Zwerschke, D.Kirk, M.L.Blankenfeldt, W.Mendel, R.R.Kruse, T.

(2018) Biochem J 475: 1739-1753

  • DOI: https://doi.org/10.1042/BCJ20170935
  • Primary Citation of Related Structures:  
    6ETD, 6ETF, 6ETH, 6GAX, 6GB0, 6GB4, 6GB9, 6GBC, 6GBF

  • PubMed Abstract: 

    The molybdenum cofactor (Moco) is a redox-active prosthetic group found in the active site of Moco-dependent enzymes, which are vitally important for life. Moco biosynthesis involves several enzymes that catalyze the subsequent conversion of GTP into cyclic pyranopterin monophosphate (cPMP), molybdopterin (MPT), adenylated MPT (MPT-AMP), and finally Moco. While the underlying principles of cPMP, MPT, and MPT-AMP formation are well understood, the molybdenum insertase (Mo-insertase)-catalyzed final Moco maturation step is not. In the present study, we analyzed high-resolution X-ray datasets of the plant Mo-insertase Cnx1E that revealed two molybdate-binding sites within the active site, hence improving the current view on Cnx1E functionality. The presence of molybdate anions in either of these sites is tied to a distinctive backbone conformation, which we suggest to be essential for Mo-insertase molybdate selectivity and insertion efficiency.


  • Organizational Affiliation

    Department of Plant Biology, Braunschweig University of Technology, 38106 Braunschweig, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Molybdopterin biosynthesis protein CNX1471Arabidopsis thalianaMutation(s): 1 
Gene Names: CNX1At5g20990F22D1.6T10F18.20
EC: 2.10.1.1 (PDB Primary Data), 2.7.7.75 (PDB Primary Data)
UniProt
Find proteins for Q39054 (Arabidopsis thaliana)
Explore Q39054 
Go to UniProtKB:  Q39054
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ39054
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.81 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.190 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.47α = 90
b = 123.42β = 90
c = 132.28γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
STARANISOdata scaling
PHASERphasing
Cootmodel building

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

  • Released Date: 2018-07-18 
  • Deposition Author(s): Krausze, J.

Revision History  (Full details and data files)

  • Version 1.0: 2018-07-18
    Type: Initial release
  • Version 1.1: 2024-01-17
    Changes: Data collection, Database references, Derived calculations, Refinement description