1LPA | pdb_00001lpa

INTERFACIAL ACTIVATION OF THE LIPASE-PROCOLIPASE COMPLEX BY MIXED MICELLES REVEALED BY X-RAY CRYSTALLOGRAPHY

• PDB DOI: https://doi.org/10.2210/pdb1LPA/pdb

• Classification: HYDROLASE(CARBOXYLIC ESTERASE)
• Organism(s): Sus scrofa, Homo sapiens
• Mutation(s): No 
• Membrane Protein: Yes  OPM


• Deposited: 1994-08-19 Released: 1994-11-01 
• Deposition Author(s): Van Tilbeurgh, H., Egloff, M.-P., Cambillau, C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.04 Å
• R-Value Work: 
  0.186 (Depositor) 
• R-Value Observed: 
  0.186 (Depositor) 

Literature

Interfacial activation of the lipase-procolipase complex by mixed micelles revealed by X-ray crystallography.

van Tilbeurgh, H., Egloff, M.P., Martinez, C., Rugani, N., Verger, R., Cambillau, C.

(1993) Nature 362: 814-820

• PubMed: 8479519 
• DOI: https://doi.org/10.1038/362814a0
• Primary Citation Related Structures: 
  1LPA


• PubMed Abstract: 
  

  The three-dimensional structure of the lipase-procolipase complex, co-crystallized with mixed micelles of phosphatidylcholine and bile salt, has been determined at 3 A resolution by X-ray crystallography. The lid, a surface helix covering the catalytic triad of lipase, adopts a totally different conformation which allows phospholipid to bind to the enzyme's active site. The open lid is an essential component of the active site and interacts with procolipase. Together they form the lipid-water interface binding site. This reorganization of the lid structure provokes a second drastic conformational change in an active site loop, which in its turn creates the oxyanion hole (induced fit).

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Organizational Affiliation: 
• LCCMB-CNRS, Faculté de Médecine Nord, Marseilles, France.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 60.89 kDa 
• Atom Count: 4,194 
• Modeled Residue Count: 534 
• Deposited Residue Count: 544 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
COLIPASE	A	95	Sus scrofa	Mutation(s): 0  Membrane Entity: Yes
UniProt
Find proteins for P02703 (Sus scrofa) Explore P02703  Go to UniProtKB:  P02703

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
LIPASE	B	449	Homo sapiens	Mutation(s): 0  EC: 3.1.1.3 Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for P16233 (Homo sapiens) Explore P16233  Go to UniProtKB:  P16233
PHAROS:  P16233 GTEx:  ENSG00000175535

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PLC	E [auth B]	DIUNDECYL PHOSPHATIDYL CHOLINE C32 H65 N O8 P IJFVSSZAOYLHEE-SSEXGKCCSA-O
BNG	C [auth B]	nonyl beta-D-glucopyranoside C15 H30 O6 QFAPUKLCALRPLH-UXXRCYHCSA-N
CA	D [auth B]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.04 Å
• R-Value Work:  0.186 (Depositor) 
• R-Value Observed: 0.186 (Depositor) 

Space Group: P 4₂ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 133.4	α = 90
b = 133.4	β = 90
c = 92.6	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1994-11-01 
Deposition Author(s): Van Tilbeurgh, H., Egloff, M.-P., Cambillau, C.

Revision History  

• Version 1.0: 1994-11-01
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-11-29
  Changes: Derived calculations, Other
• Version 1.4: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Data collection, Derived calculations, Structure summary
• Version 1.5: 2024-11-06
  Changes: Data collection, Database references, Structure summary