4AB1

Recombinant Human Carboxylesterase 1 from whole Cabbage Loopers

• PDB DOI: https://doi.org/10.2210/pdb4AB1/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Trichoplusia ni
• Mutation(s): No 


• Deposited: 2011-12-06 Released: 2012-03-07 
• Deposition Author(s): Greenblatt, H.M., Otto, T.C., Cerasoli, D.M., Sussman, J.L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.236 
• R-Value Work: 0.178 
• R-Value Observed: 0.181 

Starting Model: experimental

Literature

Structure of Recombinant Human Carboxylesterase 1 Isolated from Whole Cabbage Looper Larvae.

Greenblatt, H.M., Otto, T.C., Kirkpatrick, M.G., Kovaleva, E., Brown, S., Buchman, G., Cerasoli, D.M., Sussman, J.L.

(2012) Acta Crystallogr Sect F Struct Biol Cryst Commun 68: 269

• PubMed: 22442219 
• DOI: https://doi.org/10.1107/S1744309112003326
• Primary Citation of Related Structures:  
  4AB1


• PubMed Abstract: 
  

  The use of whole insect larvae as a source of recombinant proteins offers a more cost-effective method of producing large quantities of human proteins than conventional cell-culture approaches. Human carboxylesterase 1 has been produced in and isolated from whole Trichoplusia ni larvae. The recombinant protein was crystallized and its structure was solved to 2.2 resolution. The results indicate that the larvae-produced enzyme is essentially identical to that isolated from cultured Sf21 cells, supporting the use of this expression system to produce recombinant enzymes for crystallization studies.

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Organizational Affiliation: 

Department of Structural Biology, Weizmann Institute of Science, Rehovot 76100, Israel.

Biological Assembly 1  

Global Symmetry: Dihedral - D3  (Explore in 3D)
Global Stoichiometry: Homo 6-mer - A6 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 59.07 kDa 
• Atom Count: 4,253 
• Modelled Residue Count: 524 
• Deposited Residue Count: 532 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
LIVER CARBOXYLESTERASE 1	A	532	Homo sapiens	Mutation(s): 0  EC: 3.1.1.1 (PDB Primary Data), 3.1.1.56 (PDB Primary Data), 3.1.1.13 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P23141 (Homo sapiens) Explore P23141  Go to UniProtKB:  P23141
PHAROS:  P23141 GTEx:  ENSG00000198848
Glycosylation
Glycosylation Sites: 1		Go to GlyGen: P23141-1

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	B [auth A]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N
SCN	C [auth A], D [auth A], E [auth A]	THIOCYANATE ION C N S ZMZDMBWJUHKJPS-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.236 
• R-Value Work: 0.178 
• R-Value Observed: 0.181 
• Space Group: P 6₃ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 114.843	α = 90
b = 114.843	β = 90
c = 177.1	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-03-07 
Deposition Author(s): Greenblatt, H.M., Otto, T.C., Cerasoli, D.M., Sussman, J.L.

Revision History  

• Version 1.0: 2012-03-07
  Type: Initial release
  
• Version 1.1: 2012-05-30
  Changes: Other
• Version 1.2: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Data collection, Derived calculations, Other, Structure summary
• Version 1.3: 2023-12-20
  Changes: Data collection, Database references, Refinement description, Structure summary
• Version 1.4: 2024-10-23
  Changes: Structure summary