Crystal structure of bifunctional proline utilization A (PutA) protein

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.202 

Starting Model: experimental
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Crystal structure of the bifunctional proline utilization A flavoenzyme from Bradyrhizobium japonicum

Srivastava, D.Schuermann, J.P.White, T.A.Krishnan, N.Sanyal, N.Hura, G.L.Tan, A.Henzl, M.T.Becker, D.F.Tanner, J.J.

(2010) Proc Natl Acad Sci U S A 107: 2878-2883

  • DOI: https://doi.org/10.1073/pnas.0906101107
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The bifunctional proline catabolic flavoenzyme, proline utilization A (PutA), catalyzes the oxidation of proline to glutamate via the sequential activities of FAD-dependent proline dehydrogenase (PRODH) and NAD(+)-dependent Delta(1)-pyrroline-5-carboxylate dehydrogenase (P5CDH) domains. Although structures for some of the domains of PutA are known, a structure for the full-length protein has not previously been solved. Here we report the 2.1 A resolution crystal structure of PutA from Bradyrhizobium japonicum, along with data from small-angle x-ray scattering, analytical ultracentrifugation, and steady-state and rapid-reaction kinetics. PutA forms a ring-shaped tetramer in solution having a diameter of 150 A. Within each protomer, the PRODH and P5CDH active sites face each other at a distance of 41 A and are connected by a large, irregularly shaped cavity. Kinetics measurements show that glutamate production occurs without a lag phase, suggesting that the intermediate, Delta(1)-pyrroline-5-carboxylate, is preferably transferred to the P5CDH domain rather than released into the bulk medium. The structural and kinetic data imply that the cavity serves both as a microscopic vessel for the hydrolysis of Delta(1)-pyrroline-5-carboxylate to glutamate semialdehyde and a protected conduit for the transport of glutamate semialdehyde to the P5CDH active site.

  • Organizational Affiliation

    Department of Chemistry, University of Missouri-Columbia, Columbia, MO 65211, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Proline dehydrogenase
A, B
1,001Bradyrhizobium diazoefficiens USDA 110Mutation(s): 0 
Gene Names: blr7261putA
EC: (PDB Primary Data), (PDB Primary Data)
Find proteins for Q89E26 (Bradyrhizobium diazoefficiens (strain JCM 10833 / BCRC 13528 / IAM 13628 / NBRC 14792 / USDA 110))
Explore Q89E26 
Go to UniProtKB:  Q89E26
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ89E26
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on FAD

Download Ideal Coordinates CCD File 
C [auth A],
O [auth B]
C27 H33 N9 O15 P2
Query on NAD

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D [auth A],
P [auth B]
C21 H27 N7 O14 P2
Query on SO4

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E [auth A]
F [auth A]
G [auth A]
H [auth A]
I [auth A]
E [auth A],
F [auth A],
G [auth A],
H [auth A],
I [auth A],
J [auth A],
K [auth A],
Q [auth B],
R [auth B],
S [auth B],
T [auth B],
U [auth B],
V [auth B]
O4 S
Query on GOL

Download Ideal Coordinates CCD File 
L [auth A]
M [auth A]
N [auth A]
W [auth B]
X [auth B]
L [auth A],
M [auth A],
N [auth A],
W [auth B],
X [auth B],
Y [auth B]
C3 H8 O3
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.202 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 166.763α = 90
b = 195.846β = 121.48
c = 108.68γ = 90
Software Package:
Software NamePurpose
SCALAdata processing
PDB_EXTRACTdata extraction
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

  • Released Date: 2010-02-23 
  • Deposition Author(s): Tanner, J.J.

Revision History  (Full details and data files)

  • Version 1.0: 2010-02-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2024-02-21
    Changes: Data collection, Database references, Derived calculations
  • Version 1.3: 2024-04-03
    Changes: Refinement description