2YZ7

X-ray analyses of 3-hydroxybutyrate dehydrogenase from Alcaligenes faecalis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.19 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.197 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The structures of Alcaligenes faecalisD-3-hydroxybutyrate dehydrogenase before and after NAD(+) and acetate binding suggest a dynamical reaction mechanism as a member of the SDR family.

Hoque, M.M.Shimizu, S.Hossain, M.T.Yamamoto, T.Imamura, S.Suzuki, K.Tsunoda, M.Amano, H.Sekiguchi, T.Takenaka, A.

(2008) Acta Crystallogr D Biol Crystallogr 64: 496-505

  • DOI: https://doi.org/10.1107/S0907444908004009
  • Primary Citation of Related Structures:  
    2YZ7, 3VDQ

  • PubMed Abstract: 

    D-3-Hydroxybutyrate dehydrogenase, which catalyzes the reversible reaction between D-3-hydroxybutyrate and acetoacetate, has been classified into the short-chain dehydrogenase/reductase family and is a useful marker in the assay of diabetes mellitus and/or ketoacidosis. The enzyme from Alcaligenes faecalis was crystallized in the apo form and in the holo form with acetate as a substrate analogue. The crystal structures of both forms were determined at 2.2 angstroms resolution. The enzyme is a tetramer composed of four subunits assembled with noncrystallographic 222 point symmetry. Each subunit has two domains. The principal domain adopts the Rossmann fold essential for nucleotide binding, which is a common feature of the SDR family. NAD+ is bound in a large cleft in the domain. The pyrophosphate group of NAD+ is covered by the small additional domain, which is supported by two extended arms allowing domain movement. In the catalytic site, a water molecule is trapped by the catalytic Tyr155 and Ser142 residues in the vicinity of the bound NAD+ and acetate. The substrate analogue acetate is bound above the nicotinamide plane. A substrate (D-3-hydroxybutylate) bound model can reasonably be constructed by adding two C atoms into the void space between the water O atom and the methyl group of the acetate, suggesting a substrate-bound state before enzymatic reaction occurs. Based on these structural features, a reaction mechanism has been proposed.


  • Organizational Affiliation

    Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8501, Japan.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
D-3-hydroxybutyrate dehydrogenase
A, B, C, D, E
A, B, C, D, E, F, G, H
260Alcaligenes faecalisMutation(s): 0 
EC: 1.1.1.30
UniProt
Find proteins for D0VWQ0 (Alcaligenes faecalis)
Explore D0VWQ0 
Go to UniProtKB:  D0VWQ0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupD0VWQ0
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download Ideal Coordinates CCD File 
I [auth A],
K [auth B],
O [auth E],
Q [auth F]
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
J [auth A]
L [auth B]
M [auth C]
N [auth D]
P [auth E]
J [auth A],
L [auth B],
M [auth C],
N [auth D],
P [auth E],
R [auth F],
S [auth G],
T [auth H]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.19 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.197 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.302α = 90
b = 118.827β = 93.9
c = 118.726γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
AMoREphasing
CNSrefinement
DENZOdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-04-22
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2023-10-25
    Changes: Data collection, Database references, Derived calculations, Refinement description