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Crystal Structure of Uroporphyrinogen Decarboxylase from Bacillus subtilis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structure of uroporphyrinogen decarboxylase from Bacillus subtilis

Fan, J.Liu, Q.Hao, Q.Teng, M.K.Niu, L.W.

(2007) J.Bacteriol. 189: 3573-3580

  • DOI: 10.1128/JB.01083-06

  • PubMed Abstract: 
  • Uroporphyrinogen decarboxylase (UROD) is a branch point enzyme in the biosynthesis of the tetrapyrroles. It catalyzes the decarboxylation of four acetate groups of uroporphyrinogen III to yield coproporphyrinogen III, leading to heme and chlorophyll ...

    Uroporphyrinogen decarboxylase (UROD) is a branch point enzyme in the biosynthesis of the tetrapyrroles. It catalyzes the decarboxylation of four acetate groups of uroporphyrinogen III to yield coproporphyrinogen III, leading to heme and chlorophyll biosynthesis. UROD is a special type of nonoxidative decarboxylase, since no cofactor is essential for catalysis. In this work, the first crystal structure of a bacterial UROD, Bacillus subtilis UROD (UROD(Bs)), has been determined at a 2.3 A resolution. The biological unit of UROD(Bs) was determined by dynamic light scattering measurements to be a homodimer in solution. There are four molecules in the crystallographic asymmetric unit, corresponding to two homodimers. Structural comparison of UROD(Bs) with eukaryotic URODs reveals a variation of two loops, which possibly affect the binding of substrates and release of products. Structural comparison with the human UROD-coproporphyrinogen III complex discloses a similar active cleft, with five invariant polar residues (Arg29, Arg33, Asp78, Tyr154, and His322) and three invariant hydrophobic residues (Ile79, Phe144, and Phe207), in UROD(Bs). Among them, Asp78 may interact with the pyrrole NH groups of the substrate, and Arg29 is a candidate for positioning the acetate groups of the substrate. Both residues may also play catalytic roles.


    Organizational Affiliation

    Hefei National laboratory of Physical Sciences at Microscale and School of Life Sciences, University of Science & Technology of China, Hefei Anhui, 230027, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Uroporphyrinogen decarboxylase
A, B, C, D
359Bacillus subtilis (strain 168)Mutation(s): 2 
Gene Names: hemE
EC: 4.1.1.37
Find proteins for P32395 (Bacillus subtilis (strain 168))
Go to UniProtKB:  P32395
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.197 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 58.612α = 68.68
b = 80.410β = 89.64
c = 90.940γ = 80.82
Software Package:
Software NamePurpose
REFMACrefinement
AUTOMARdata reduction
AMoREphasing
MAR345data collection
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-10-24
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-18
    Type: Refinement description