4AQD

Crystal structure of fully glycosylated human butyrylcholinesterase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.163 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Human butyrylcholinesterase produced in insect cells: huprine-based affinity purification and crystal structure.

Brazzolotto, X.Wandhammer, M.Ronco, C.Trovaslet, M.Jean, L.Lockridge, O.Renard, P.Y.Nachon, F.

(2012) FEBS J. 279: 2905-2916

  • DOI: 10.1111/j.1742-4658.2012.08672.x

  • PubMed Abstract: 
  • Butyrylcholinesterase (BChE) is a serine hydrolase that is present in all mammalian tissues. It can accommodate larger substrates or inhibitors than acetylcholinesterase (AChE), the enzyme responsible for hydrolysis of the neurotransmitter acetylchol ...

    Butyrylcholinesterase (BChE) is a serine hydrolase that is present in all mammalian tissues. It can accommodate larger substrates or inhibitors than acetylcholinesterase (AChE), the enzyme responsible for hydrolysis of the neurotransmitter acetylcholine in the central nervous system and neuromuscular junctions. AChE is the specific target of organophosphorous pesticides and warfare nerve agents, and BChE is a stoichiometric bioscavenger. Conversion of BChE into a catalytic bioscavenger by rational design or designing reactivators specific to BChE required structural data obtained using a recombinant low-glycosylated human BChE expressed in Chinese hamster ovary cells. This expression system yields ≈ 1 mg of pure enzyme per litre of cell culture. Here, we report an improved expression system using insect cells with a fourfold higher yield for truncated human BChE with all glycosylation sites present. We developed a fast purification protocol for the recombinant protein using huprine-based affinity chromatography, which is superior to the classical procainamide-based affinity. The purified BChE crystallized under different conditions and space group than the recombinant low-glycosylated protein produced in Chinese hamster ovary cells. The crystals diffracted to 2.5 Å. The overall monomer structure is similar to the low-glycosylated structure except for the presence of the additional glycans. Remarkably, the carboxylic acid molecule systematically bound to the catalytic serine in the low-glycosylated structure is also present in this new structure, despite the different expression system, purification protocol and crystallization conditions.


    Organizational Affiliation

    Département de Toxicologie, Institut de Recherche Biomédicale des Armées, La Tronche, France. xavier@brazzolotto.net




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BUTYRYLCHOLINESTERASE
A, B
531Homo sapiensMutation(s): 0 
Gene Names: BCHE (CHE1)
EC: 3.1.1.8
Find proteins for P06276 (Homo sapiens)
Go to Gene View: BCHE
Go to UniProtKB:  P06276
Small Molecules
Ligands 10 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GLY
Query on GLY

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A, B
GLYCINE
C2 H5 N O2
DHMQDGOQFOQNFH-UHFFFAOYSA-N
 Ligand Interaction
BAL
Query on BAL

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A, B
BETA-ALANINE
C3 H7 N O2
UCMIRNVEIXFBKS-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

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A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MAN
Query on MAN

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A
ALPHA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-PQMKYFCFSA-N
 Ligand Interaction
UNX
Query on UNX

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A, B
UNKNOWN ATOM OR ION
X
*
 Ligand Interaction
EDO
Query on EDO

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A, B
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
PG4
Query on PG4

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A
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

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B
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

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A, B
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
FUL
Query on FUL

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A, B
BETA-L-FUCOSE
6-DEOXY-BETA-L-GALACTOSE
C6 H12 O5
SHZGCJCMOBCMKK-KGJVWPDLSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.163 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 72.750α = 90.00
b = 79.260β = 90.00
c = 227.200γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
XDSdata reduction
XSCALEdata scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-07-04
    Type: Initial release
  • Version 1.1: 2012-08-08
    Type: Database references
  • Version 1.2: 2013-11-20
    Type: Derived calculations
  • Version 1.3: 2018-11-14
    Type: Advisory, Data collection, Database references