	233,605 Structures from the PDB
	1,068,577 Computed Structure Models (CSM)

1ETH|pdb_00001eth

TRIACYLGLYCEROL LIPASE/COLIPASE COMPLEX

PDB DOI: https://doi.org/10.2210/pdb1ETH/pdb

Classification: COMPLEX (HYDROLASE/COFACTOR)
Organism(s): Sus scrofa
Mutation(s): No
Membrane Protein: Yes OPM

Deposited: 1995-09-13 Released: 1996-12-07
Deposition Author(s): Hermoso, J.,Pignol, D.,Kerfelec, B.,Crenon, I.,Chapus, C.,Fontecilla-Camps, J.C.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.80 Å
R-Value Free:
0.290 (Depositor)
R-Value Work:
0.210 (Depositor)
R-Value Observed:
0.210 (Depositor)

wwPDB Validation 3D Report Full Report

This is version 2.1 of the entry. See complete history.

Literature

Lipase activation by nonionic detergents. The crystal structure of the porcine lipase-colipase-tetraethylene glycol monooctyl ether complex.

Hermoso, J., Pignol, D., Kerfelec, B., Crenon, I., Chapus, C., Fontecilla-Camps, J.C.

(1996) J Biological Chem 271: 18007-18016

PubMed: 8663362 Search on PubMed
DOI: https://doi.org/10.1074/jbc.271.30.18007
Primary Citation of Related Structures:
1ETH

PubMed Abstract:
The crystal structure of the ternary porcine lipase-colipase-tetra ethylene glycol monooctyl ether (TGME) complex has been determined at 2.8 A resolution. The crystals belong to the cubic space group F23 with a = 289.1 A and display a strong pseudo-symmetry corresponding to a P23 lattice. Unexpectedly, the crystalline two-domain lipase is found in its open configuration. This indicates that in the presence of colipase, pure micelles of the nonionic detergent TGME are able to activate the enzyme; a process that includes the movement of an N-terminal domain loop (the flap). The effects of TGME and colipase have been confirmed by chemical modification of the active site serine residue using diisopropyl p-nitrophenylphosphate (E600). In addition, the presence of a TGME molecule tightly bound to the active site pocket shows that TGME acts as a substrate analog, thus possibly explaining the inhibitory effect of this nonionic detergent on emulsified substrate hydrolysis at submicellar concentrations. A comparison of the lipase-colipase interactions between our porcine complex and the human-porcine complex (van Tilbeurgh, H., Egloff, M.-P., Martinez, C., Rugani, N., Verger, R., and Cambillau, C.(1993) Nature 362, 814-820) indicates that except for one salt bridge interaction, they are conserved. Analysis of the superimposed complexes shows a 5.4 degrees rotation on the relative position of the N-terminal domains excepting the flap that moves in a concerted fashion with the C-terminal domain. This flexibility may be important for the binding of the complex to the water-lipid interface.

Organizational Affiliation

Laboratoire de Cristallographie et de Cristallogénèse des Protéines, Institut de Biologie Structurale Jean-Pierre Ebel, CEA-CNRS, Grenoble, France.

Macromolecule Content

Total Structure Weight: 123.74 kDa
Atom Count: 8,911
Modelled Residue Count: 1,070
Deposited Residue Count: 1,086
Unique protein chains: 2

Macromolecules

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(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
TRIACYLGLYCEROL ACYL-HYDROLASE	A,C	448	Sus scrofa	Mutation(s): 0 EC: 3.1.1.3
UniProt
Find proteins for P00591 (Sus scrofa) Explore P00591 Go to UniProtKB: P00591
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P00591
Glycosylation
Glycosylation Sites: 1	Glycosylation Focus chain A Focus chain C
Sequence Annotations Expand
Reference Sequence

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
COLIPASE	B,D	95	Sus scrofa	Mutation(s): 0 Membrane Entity: Yes
UniProt
Find proteins for P02703 (Sus scrofa) Explore P02703 Go to UniProtKB: P02703
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P02703
Sequence Annotations Expand
Reference Sequence

Oligosaccharides

Help

Entity ID: 3
Molecule	Chains	Length	2D Diagram	Glycosylation	3D Interactions
beta-D-mannopyranose-(1-3)-[beta-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	E, F	5		N-Glycosylation	Interactions Focus chain E Focus chain F
Glycosylation Resources
GlyTouCan: G89225LT GlyCosmos: G89225LT GlyGen: G89225LT

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
C8E Query on C8E Download Ideal Coordinates CCD File SDF format, chain H [auth A] SDF format, chain L [auth C] SDF format, chain I [auth A] SDF format, chain M [auth C] MOL2 format, chain H [auth A] MOL2 format, chain L [auth C] MOL2 format, chain I [auth A] MOL2 format, chain M [auth C] mmCIF format, chain H [auth A] mmCIF format, chain L [auth C] mmCIF format, chain I [auth A] mmCIF format, chain M [auth C]	H [auth A], I [auth A], L [auth C], M [auth C]	(HYDROXYETHYLOXY)TRI(ETHYLOXY)OCTANE C₁₆ H₃₄ O₅ FEOZZFHAVXYAMB-UHFFFAOYSA-N		Interactions Focus chain H [auth A] Focus chain I [auth A] Focus chain L [auth C] Focus chain M [auth C]
BME Query on BME Download Ideal Coordinates CCD File SDF format, chain J [auth A] SDF format, chain N [auth C] MOL2 format, chain J [auth A] MOL2 format, chain N [auth C] mmCIF format, chain J [auth A] mmCIF format, chain N [auth C]	J [auth A], N [auth C]	BETA-MERCAPTOETHANOL C₂ H₆ O S DGVVWUTYPXICAM-UHFFFAOYSA-N		Interactions Focus chain J [auth A] Focus chain N [auth C]
CA Query on CA Download Ideal Coordinates CCD File SDF format, chain G [auth A] SDF format, chain K [auth C] MOL2 format, chain G [auth A] MOL2 format, chain K [auth C] mmCIF format, chain G [auth A] mmCIF format, chain K [auth C]	G [auth A], K [auth C]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N		Interactions Focus chain G [auth A] Focus chain K [auth C]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.80 Å
R-Value Free: 0.290 (Depositor)
R-Value Work: 0.210 (Depositor)
R-Value Observed: 0.210 (Depositor)

Space Group: F 2 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 289.1	α = 90
b = 289.1	β = 90
c = 289.1	γ = 90

Software Package:

Software Name	Purpose
MOSFLM	data reduction
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

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Entry History

Deposition Data

Released Date: 1996-12-07

Deposition Author(s):

Fontecilla-Camps, J.C.

Revision History (Full details and data files)

Version 1.0: 1996-12-07
Type: Initial release
Version 1.1: 2008-03-27
Changes: Version format compliance
Version 1.2: 2011-07-13
Changes: Non-polymer description, Version format compliance
Version 1.3: 2018-03-21
Changes: Data collection
Version 2.0: 2020-07-29
Type: Remediation
Reason: Carbohydrate remediation
Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Structure summary
Version 2.1: 2025-03-26
Changes: Data collection, Database references, Structure summary