3WE7

Crystal Structure of Diacetylchitobiose Deacetylase from Pyrococcus horikoshii


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Expression from engineered Escherichia coli chromosome and crystallographic study of archaeal N,N'-diacetylchitobiose deacetylase

Mine, S.Niiyama, M.Hashimoto, W.Ikegami, T.Koma, D.Ohmoto, T.Fukuda, Y.Inoue, T.Abe, Y.Ueda, T.Morita, J.Uegaki, K.Nakamura, T.

(2014) FEBS J 281: 2584-2596

  • DOI: https://doi.org/10.1111/febs.12805
  • Primary Citation of Related Structures:  
    3WE7, 3WL3, 3WL4

  • PubMed Abstract: 

    In order to develop a structure-based understanding of the chitinolytic pathway in hyperthermophilic Pyrococcus species, we performed crystallographic studies on N,N'-diacetylchitobiose deacetylases (Dacs) from Pyrococcus horikoshii (Ph-Dac) and Pyrococcus furiosus (Pf-Dac). Neither Ph-Dac nor Pf-Dac was expressed in the soluble fraction of Escherichia coli harboring the expression plasmid. However, insertion of the target genes into the chromosome of E. coli yielded the soluble recombinant protein. The purified Pyrococcus Dacs were active and thermostable up to 85 °C. The crystal structures of Ph-Dac and Pf-Dac were determined at resolutions of 2.0 Å and 1.54 Å, respectively. The Pyrococcus Dac forms a hexamer composed of two trimers. These Dacs are characterized by an intermolecular cleft, which is formed by two polypeptides in the trimeric assembly. In Ph-Dac, catalytic Zn situated at the end of the cleft is coordinated by three side chain ligands from His44, Asp47, and His155, and by a phosphate ion derived from the crystallization reservoir solution. We considered that the bound phosphate mimicked the tetrahedral oxyanion, which is an intermediate of hydrolysis of the N-acetyl group, and proposed an appropriate reaction mechanism. In the proposed mechanism, the N(ε) atom of His264 (from the adjacent polypeptide in the Ph-Dac sequence) is directly involved in the stabilization of the oxyanion intermediate. Mutation analysis also indicated that His264 was essential to the catalysis. These factors give the archaeal Dacs an unprecedented active site architecture a Zn-dependent deacetylases. Structural data are available in the Protein Data Bank database under accession numbers 3WL3, 3WL4, and 3WE7.


  • Organizational Affiliation

    National Institute of Advanced Industrial Science and Technology, Osaka, Japan.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Putative uncharacterized protein PH0499
A, B, C
272Pyrococcus horikoshii OT3Mutation(s): 0 
Gene Names: PH0499
UniProt
Find proteins for O58235 (Pyrococcus horikoshii (strain ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3))
Explore O58235 
Go to UniProtKB:  O58235
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO58235
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
HEZ
Query on HEZ

Download Ideal Coordinates CCD File 
L [auth B],
M [auth B],
R [auth C],
S [auth C]
HEXANE-1,6-DIOL
C6 H14 O2
XXMIOPMDWAUFGU-UHFFFAOYSA-N
GOL
Query on GOL

Download Ideal Coordinates CCD File 
E [auth A],
H [auth B],
I [auth B],
P [auth C]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
ZN
Query on ZN

Download Ideal Coordinates CCD File 
D [auth A],
G [auth B],
N [auth C]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
ACY
Query on ACY

Download Ideal Coordinates CCD File 
F [auth A],
J [auth B],
O [auth C]
ACETIC ACID
C2 H4 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-N
NA
Query on NA

Download Ideal Coordinates CCD File 
K [auth B],
Q [auth C]
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.372α = 90
b = 77.372β = 90
c = 230.223γ = 120
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-05-07
    Type: Initial release
  • Version 1.1: 2014-08-20
    Changes: Database references