1FM0

MOLYBDOPTERIN SYNTHASE (MOAD/MOAE)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.152 
  • R-Value Observed: 0.153 

wwPDB Validation   3D Report Full Report


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


Literature

Crystal structure of molybdopterin synthase and its evolutionary relationship to ubiquitin activation.

Rudolph, M.J., Wuebbens, M.M., Rajagopalan, K.V., Schindelin, H.

(2001) Nat Struct Biol 8: 42-46

  • DOI: 10.1038/83034
  • Primary Citation of Related Structures:  
    1FM0, 1FMA

  • PubMed Abstract: 

    • Molybdenum cofactor (Moco) biosynthesis is an evolutionarily conserved pathway present in eubacteria, archaea and eukaryotes, including humans. Genetic deficiencies of enzymes involved in Moco biosynthesis in humans lead to a severe and usually fatal ...

    Molybdenum cofactor (Moco) biosynthesis is an evolutionarily conserved pathway present in eubacteria, archaea and eukaryotes, including humans. Genetic deficiencies of enzymes involved in Moco biosynthesis in humans lead to a severe and usually fatal disease. Moco contains a tricyclic pyranopterin, termed molybdopterin (MPT), that bears the cis-dithiolene group responsible for molybdenum ligation. The dithiolene group of MPT is generated by MPT synthase, which consists of a large and small subunits. The 1.45 A resolution crystal structure of MPT synthase reveals a heterotetrameric protein in which the C-terminus of each small subunit is inserted into a large subunit to form the active site. In the activated form of the enzyme this C-terminus is present as a thiocarboxylate. In the structure of a covalent complex of MPT synthase, an isopeptide bond is present between the C-terminus of the small subunit and a Lys side chain in the large subunit. The strong structural similarity between the small subunit of MPT synthase and ubiquitin provides evidence for the evolutionary antecedence of the Moco biosynthetic pathway to the ubiquitin dependent protein degradation pathway.

    Organizational Affiliation: 

    Department of Biochemistry and Center for Structural Biology, State University of New York at Stony Brook, Stony Brook, New York 11794-5215, USA.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
MOLYBDOPTERIN CONVERTING FACTOR, SUBUNIT 1D81Escherichia coliMutation(s): 0 
Find proteins for P30748 (Escherichia coli (strain K12))
Explore P30748 
Go to UniProtKB:  P30748
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
MOLYBDOPTERIN CONVERTING FACTOR, SUBUNIT 2E150Escherichia coliMutation(s): 0 
EC: 2.8.1.12
Find proteins for P30749 (Escherichia coli (strain K12))
Explore P30749 
Go to UniProtKB:  P30749
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL
Download CCD File 
D, E
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.152 
  • R-Value Observed: 0.153 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.029α = 90
b = 48.955β = 107.72
c = 76.457γ = 90
Software Package:
Software NamePurpose
SHARPphasing
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-01-17
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance