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Dully M, Bhattacharya S, Verma V, Murray D, Thompson D, Soulimane T, Hudson SP. Balanced lipase interactions for degradation-controlled paclitaxel release from lipid cubic phase formulations. J Colloid Interface Sci 2021; 607:978-991. [PMID: 34571316 DOI: 10.1016/j.jcis.2021.09.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Revised: 09/03/2021] [Accepted: 09/04/2021] [Indexed: 11/25/2022]
Abstract
Lipid cubic phase (LCP) formulations enhance the intestinal solubility and bioavailability of hydrophobic drugs by reducing precipitation and facilitating their mass transport to the intestinal surface for absorption. LCPs with an ester linkage connecting the acyl chain to the glycerol backbone (monoacylglycerols), are susceptible to chemical digestion by several lipolytic enzymes including lipases, accelerating the release of hydrophobic agents from the lipid bilayers of the matrix. Unlike regular enzymes that transform soluble substrates, lipolytic enzymes act at the interface of water and insoluble lipid. Therefore, compounds that bind to this interface can enhance or inhibit the activity of enzymes to varying extent. Here, we explore how the lipolysis rate can be tuned by the interfacial interaction of porcine pancreatic lipase with monoolein LCPs containing a known lipase inhibitor, tetrahydrolipstatin. Release of the Biopharmaceutical Classification System (BCS) class IV drug, paclitaxel, from the inhibitor-modified LCP was examined in the presence of lipase and its effectors colipase and calcium. By combining experimental dynamic digestion studies, thermodynamic measurements and molecular dynamics simulations of the competitive inhibition of lipase by tetrahydrolipstatin, we reveal the role and mode of action of lipase effectors in creating a precisely-balanced degradation-controlled LCP release system for the poorly soluble paclitaxel drug.
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Affiliation(s)
- Michele Dully
- Department of Chemical Sciences, SSPC the Science Foundation Ireland Research Centre for Pharmaceuticals, Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland
| | - Shayon Bhattacharya
- Department of Physics, Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland
| | - Vivek Verma
- Department of Chemical Sciences, SSPC the Science Foundation Ireland Research Centre for Pharmaceuticals, Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland
| | - David Murray
- COOK Ireland Limited, O'Halloran Rd, Castletroy, Co., Limerick, Ireland
| | - Damien Thompson
- Department of Physics, Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland.
| | - Tewfik Soulimane
- Department of Chemical Sciences, SSPC the Science Foundation Ireland Research Centre for Pharmaceuticals, Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland.
| | - Sarah P Hudson
- Department of Chemical Sciences, SSPC the Science Foundation Ireland Research Centre for Pharmaceuticals, Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland.
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The smooth-hound lipolytic system: Biochemical characterization of a purified digestive lipase, lipid profile and in vitro oil digestibility. Int J Biol Macromol 2017; 102:1120-1129. [PMID: 28476598 DOI: 10.1016/j.ijbiomac.2017.05.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 04/27/2017] [Accepted: 05/01/2017] [Indexed: 12/31/2022]
Abstract
In order to identify fish enzymes displaying novel biochemical properties, we choose the common smooth-hound (Mustelus mustelus) as a starting biological material to characterize the digestive lipid hydrolyzing enzyme. A smooth-hound digestive lipase (SmDL) was purified from a delipidated pancreatic powder. The SmDL molecular weight was around 50kDa. Specific activities of 2200 and 500U/mg were measured at pH 9 and 40°C using tributyrin and olive oil emulsion as substrates, respectively. Unlike known mammal pancreatic lipases, the SmDL was stable at 50°C and it retained 90% of its initial activity after 15min of incubation at 60°C. Interestingly, bile salts act as an activator of the SmDL. It's worth to notice that the SmDL was also salt-tolerant since it was active in the presence of high salt concentrations reaching 0.8M. Fatty acid (FA) analysis of oil from the smooth-hound viscera showed a dominance of unsaturated ones (UFAs). Interestingly, the major n-3 fatty acids were DHA and EPA with contents of 18.07% and 6.14%, respectively. In vitro digestibility model showed that the smooth hound oil was efficiently hydrolyzed by pancreatic lipases, which suggests the higher assimilation of fish oils by consumers.
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Smichi N, Fendri A, Zarai Z, Bouchaala E, Chérif S, Gargouri Y, Miled N. Lipolytic activity levels and colipase presence in digestive glands of some marine animals. FISH PHYSIOLOGY AND BIOCHEMISTRY 2012; 38:1449-1458. [PMID: 22457120 DOI: 10.1007/s10695-012-9633-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2011] [Accepted: 03/12/2012] [Indexed: 05/31/2023]
Abstract
Studies on the digestive secretions in aquatic animals can elucidate certain aspects of their nutritive physiology. The aim of the present study was to compare the digestive lipase and phospholipase activities in ten marine species belonging to four classes following the taxonomic classification of marine organisms. All aquatic digestive tissues tested are equipped with lipase and phospholipase activities, assuming the hydrolysis of fat-rich food. The lipolytic activities determined in the pancreases of cartilaginous fishes were greater than those in bony fishes, molluscs and crustaceans. This finding might be explained by the strong digestive utilization of fat-rich macronutrients by these carnivorous fishes. A trend of activities and stabilities at different pH and temperatures for crude lipases and phospholipases from these aquatic animals suggests that the optimum pH and temperature for marine lipases are species dependent. Interestingly, the sardine caecal lipase and phospholipase were found to be mostly stable in a broad range of acidic pH values. The maximum activities of lipolytic enzymes from the hepatopancreases of Hexaplex trunculus (molluscs) and Carcinus mediterranus (crustaceans) were found to be 50 and 60 °C, respectively, whereas the optimal temperature of lipolytic enzymes for the other species was classically around 40 °C. Thermoactivity of molluscs' lipolytic preparations makes them potential candidates in industrial applications. Among digestive glands studied, only pancreas (cartilaginous fish) contained the classically known colipase. Regarded as the most primitive living jawed vertebrates, cartilaginous fishes represented by sharks and rays could be considered as the oldest vertebrates possessing a complex digestive system like that of mammals.
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Affiliation(s)
- Nabil Smichi
- Laboratoire de Biochimie et de Génie Enzymatique des Lipases, ENIS, route de Soukra, 1173, Sfax, BP, Tunisia
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Goswami D, Basu JK, De S. Erucic acid production using porcine pancreas lipase: Enhancement by mixed surfactants. BIOTECHNOL BIOPROC E 2011. [DOI: 10.1007/s12257-010-0193-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Amara S, Fendri A, Ben Salem N, Gargouri Y, Miled N. Snail Hepatopancreatic Lipase: A New Member of Invertebrates Lipases' Group. Appl Biochem Biotechnol 2009; 162:942-52. [DOI: 10.1007/s12010-009-8837-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2009] [Accepted: 10/25/2009] [Indexed: 11/29/2022]
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Kerfelec B, Allouche M, Colin D, Van Eyck MH, Brasseur R, Thomas A. Computational study of colipase interaction with lipid droplets and bile salt micelles. Proteins 2008; 73:828-38. [PMID: 18506778 DOI: 10.1002/prot.22109] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Colipase is a key element in the lipase-catalyzed hydrolysis of dietary lipids. Although devoid of enzymatic activity, colipase promotes the pancreatic lipase activity in physiological intestinal conditions by anchoring the enzyme at the surface of lipid droplets. Analysis of structures of NMR colipase models and simulations of their interactions with various lipid aggregates, lipid droplet, and bile salt micelle, were carried out to determine and to map the lipid binding sites on colipase. We show that the micelle and the oil droplet bind to the same side of colipase 3D structure, mainly the hydrophobic fingers. Moreover, it appears that, although colipase has a single direction of interaction with a lipid interface, it does not bind in a specific way but rather oscillates between different positions. Indeed, different NMR models of colipase insert different fragments of sequence in the interface, either simultaneously or independently. This supports the idea that colipase finger plasticity may be crucial to adapt the lipase activity to different lipid aggregates.
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Affiliation(s)
- Brigitte Kerfelec
- INRA, UMR1260, Nutriments lipidiques et Prévention des Maladies Métaboliques, Marseille F-13385, France
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Sémériva M, Desnuelle P. Pancreatic lipase and colipase. An example of heterogeneous biocatalysis. ADVANCES IN ENZYMOLOGY AND RELATED AREAS OF MOLECULAR BIOLOGY 2006; 48:319-70. [PMID: 367105 DOI: 10.1002/9780470122938.ch7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Shi Y, Burn P. Lipid metabolic enzymes: emerging drug targets for the treatment of obesity. Nat Rev Drug Discov 2004; 3:695-710. [PMID: 15286736 DOI: 10.1038/nrd1469] [Citation(s) in RCA: 225] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Yuguang Shi
- Endocrine Research, Lilly Research Laboratories, Eli Lilly and Company, Indianapolis, Indiana 46285, USA
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Tiss A, Ransac S, Lengsfeld H, Hadvàry P, Cagna A, Verger R. Surface behaviour of bile salts and tetrahydrolipstatin at air/water and oil/water interfaces. Chem Phys Lipids 2001; 111:73-85. [PMID: 11438285 DOI: 10.1016/s0009-3084(01)00149-9] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The surface behaviour of two bile salts, sodium deoxycholate (NaDC) and sodium taurodeoxycholate (NaTDC), as well as that of tetrahydrolipstatin (THL), a potent gastrointestinal lipase inhibitor, was studied at air/water and oil/water interfaces, using interfacial tensiometry methods. The surface behaviour of NaDC and NaTDC was comparable at both oil/water and air/water interfaces. A fairly compact interfacial monolayer of bile salts is formed well below the critical micellar concentration (CMC) and can help to explain the well-known effects of bile salts on the kinetic behaviour of pancreatic lipases. Using the Wilhelmy plate technique, the surface pressure-molecular area curves recorded with THL at the air/water interface showed a collapse point at a surface pressure of 24.5 mN.m(-1), corresponding to a molecular area of 70 A(2). Surprisingly, using the oil drop method, a limiting molecular area of 160 A(2) was found to exist at the oil/water interface. On the basis of the above data, space-filling models were proposed for bile salts and THL at air/water and oil/water interfaces.
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Affiliation(s)
- A Tiss
- Laboratoire de Lipolyse Enzymatique, UPR 9025 du CNRS, 31 chemin Joseph-Aiguier, 13402, Cedex 20, Marseille, France
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11
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Thomson AB, De Pover A, Keelan M, Jarocka-Cyrta E, Clandinin MT. Inhibition of lipid absorption as an approach to the treatment of obesity. Methods Enzymol 1997; 286:3-44. [PMID: 9309643 DOI: 10.1016/s0076-6879(97)86003-x] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A reduction in fat intake may be achieved by making educated choices to reduce total calorie intake, to consume a lower quantity of total fats, or to modify the ratio of saturated-to-polyunsaturated lipids. Leptin agonists or NPY or CCK antagonists may prove to be useful to diminish appetite and thereby reduce the total intake of food. But eating has such cultural, social, and hedonistic attributes that such a single-pronged approach is unlikely to be successful. The use of fat substitutes may prove to be popular to provide a wide range of snack food options, but these are likely to be of minimal use in weight reduction programs because of their distribution of additives in only a limited number of foods. The inhibitors of lipid digestion will be modestly successful in the short term; their long-term success will be influenced by gastrointestinal adverse effects and the need to consume fat-soluble vitamin supplements to prevent the development of fat-soluble vitamin deficiencies. The inhibition of lipid absorption is an attractive targeted approach for the treatment of obesity, since this would reduce the uptake of visible as well as invisible fats, which would potentially offer convenient dosing, and could also be a means to inhibit secondarily the uptake of carbohydrate calories.
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Affiliation(s)
- A B Thomson
- Department of Medicine, University of Alberta, Edmonton, Canada
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Labourdenne S, Brass O, Ivanova M, Cagna A, Verger R. Effects of colipase and bile salts on the catalytic activity of human pancreatic lipase. A study using the oil drop tensiometer. Biochemistry 1997; 36:3423-9. [PMID: 9131991 DOI: 10.1021/bi961331k] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Using the oil drop technique, we studied the effects of colipase and bile salts on the rate of hydrolysis of soybean oil by human pancreatic lipase (HPL) as well as on the interfacial binding. Upon continuously recording the decrease in the interfacial tension with time, a 10-15-fold increase in the HPL activity was found to occur in the presence of colipase. The catalytic rate constants of hydrolysis measured at the oil drop surface were found to be of the same order of magnitude as those obtained with monomolecular films spread at the air-water interface. Biotin-labeled HPL (HPL*) was used to determine the amount of adsorbed enzyme using an ELISA test. Less than 1% of the total amount of injected HPL* molecules was found to have adsorbed to the oil-water interface, and no significant effects of colipase on HPL* binding were observed. No significant changes in the hydrolysis rates or the binding of HPL* were detected in the presence of bile salts at concentrations ranging from below their critical micellar concentration (CMC) up to 100 microM. At the oil-water interface, in the absence or presence of bile salts below their CMC, it can be concluded that the colipase is a true lipase cofactor, i.e, it increases the enzyme turnover (approximately 10-15-fold) and does not affect the interfacial lipase adsorption.
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Affiliation(s)
- S Labourdenne
- UPR 9025 de l'IFR1 du CNRS, Laboratoire de Lipolyse Enzymatique, Marseille, France
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13
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Erlanson-Albertsson C. Pancreatic colipase. Structural and physiological aspects. BIOCHIMICA ET BIOPHYSICA ACTA 1992; 1125:1-7. [PMID: 1567900 DOI: 10.1016/0005-2760(92)90147-n] [Citation(s) in RCA: 92] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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14
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Wicker C, Puigserver A. Rat pancreatic colipase mRNA: nucleotide sequence of a cDNA clone and nutritional regulation by a lipidic diet. Biochem Biophys Res Commun 1990; 167:130-6. [PMID: 2129524 DOI: 10.1016/0006-291x(90)91740-j] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A cDNA clone encoding rat pancreatic colipase was isolated using as a probe a synthetic deoxyoligonucleotide corresponding to a highly conserved amino acid sequence region in colipases from other species. The cloned messenger codes for a protein of 95 amino acids plus a signal peptide of 17 amino acids. The structure of the full-length cDNA was also determined and the corresponding amino acid sequence showed a high degree of homology with those of other known colipases. Quantification of the homologous mRNA in the pancreas of animals fed a high-lipid diet was consistent with a specific though moderate induction of colipase messenger by the nutritional manipulation.
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Affiliation(s)
- C Wicker
- Centre de Biochimie et de Biologie Moléculaire du Centre National de la Recherche Scientifique, Marseille, France
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15
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Gargouri Y, Julien R, Bois AG, Verger R, Sarda L. Studies on the detergent inhibition of pancreatic lipase activity. J Lipid Res 1983. [DOI: 10.1016/s0022-2275(20)37884-6] [Citation(s) in RCA: 150] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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16
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Larsson A, Erlanson-Albertsson C. The importance of bile salt for the reactivation of pancreatic lipase by colipase. BIOCHIMICA ET BIOPHYSICA ACTA 1983; 750:171-7. [PMID: 6824711 DOI: 10.1016/0005-2760(83)90217-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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17
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Pierrot M, Astier JP, Astier M, Charles M, Drenth J. Pancreatic colipase: crystallographic and biochemical aspects. EUROPEAN JOURNAL OF BIOCHEMISTRY 1982; 123:347-54. [PMID: 7075593 DOI: 10.1111/j.1432-1033.1982.tb19774.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A detailed study of the crystallization of hog and horse colipases has been undertaken. Several crystallographic varieties have been obtained and a 0.3-nm resolution structure determination is actually in progress. The sequence of the A form of horse colipase (one methionine) is given. From spectrophotometric experiments and sequence comparisons, the involvement of the aromatic residue in position 52 in the micelle binding site has been demonstrated.
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Sari H, Dubes JP, Tachoire H, Entressangles B, Desnuelle P. [Effect of the addition of hog pancreatic colipase on the permeability to glucose and the phase transition of phosphatidyl choline liposomes]. Biochimie 1981; 63:389-95. [PMID: 7236739 DOI: 10.1016/s0300-9084(81)80011-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
An interaction between porcine pancreatic coli-pase and lecithin liposomes is demonstrated by gel filtration assays. The extent of the colipase penetration into the phospholipid bilayer was assessed by permeability and calorimetry studies carried out on the liposome colipase complex. The addition of colipase to liposomes induces a three fold increase in the permeability to [6-H3] glucose. This result reflects a perturbation in the bilayer which may be the consequence of the colipase interaction. The phase transition temperature is not modified by the added colipase. This observation suggests that the perturbation brought by the protein does not affect the acyl chain packing of the bulk lipid. On the other hand the enthalpy of transition (delta H) is decreased from 8.9 to 7.8 kcal/mole by the addition of colipase to the lipid. This could be explained by the interaction of the colipase with neighbouring acyl chains which do not participate in the cooperative melting of the bulk lipid. In agreement with previous spectrophotometric observations, the present results are indicative of hydrophobic interactions between colipase and bilayer hydrocarbon chains.
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19
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Erlanson-Albertsson C. Measurement of the binding of colipase to a triacylglycerol substrate. BIOCHIMICA ET BIOPHYSICA ACTA 1980; 617:371-82. [PMID: 7370284 DOI: 10.1016/0005-2760(80)90003-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The binding between colipase and two triacylglycerol substrates, tributyrin and Intralipid, in the presence of bile salts have been determined quantitatively by a method based on equilibrium partition in an aqueous two-phase system. In the model proposed the triacylglycerol, in the form of spherical droplets covered with bile salt, is assumed to have a certain number of independent binding sites at the surface for colipase. The binding of colipase to tributyrin at pH 7.0 in the presence of 4 mM sodium taurodeoxycholate and 150 mM NaCl had a dissociation constant Kd = 3.3 . 10(-7) M; the concentration of binding sites was 1.2 . 10(-6) M in a 102 mM tributyrin emulsion. When tributyrin was dispersed in 1 mM and 12 mM sodium taurodeoxycholate the dissociation constant was somewhat higher, 6.3 . 10(-7) M and 6.0 . 10(-7) M, respectively. Thus the binding strength was optimal at 4 mM sodium taurodeoxycholate. At the same time the concentration of binding sites decreased from 4.1 . 10(-6) M for 1 mM sodium taurodeoxycholate to 1.4 . 10(-6) M for 12 mM sodium taurodeoxycholate. This indicated that at higher bile salt concentration the bile salt acted as non-competitive inhibitors on the binding of colipase to the substrate, thus binding to other sites than colipase to the substrate. The binding of colipase to Intralipid, an emulsion of a long-chain triacylglycerol stabilized with phosphatidylcholine and glycerol, was more complex with indications of several different binding sites with different affinity. The majority of these had a dissociation constant Kd = 1.2 . 10(-6) M in the presence of 4 mM sodium taurodeoxycholate and 150 mM. With each droplet having a diameter of 10(-4) cm, the number of binding sites on each droplet was determined to 1.96 . 10(5) and the average area available for each colipase molecule to 1600 A at saturation. Colipase on denaturation has a surface of 1320 A.
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Binding of porcine pancreatic lipase and colipase in the absence of substrate studies by two-phase partition and affinity chromatography. J Biol Chem 1978. [DOI: 10.1016/s0021-9258(17)34703-8] [Citation(s) in RCA: 82] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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22
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Patton JS, Donnér J, Borgström B. Lipase-colipase interactions during gel filtration. High and low affinity binding situations. BIOCHIMICA ET BIOPHYSICA ACTA 1978; 529:67-78. [PMID: 638181 DOI: 10.1016/0005-2760(78)90104-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The interaction of porcine pancreatic lipase and colipase was studied during gel filtration in columns eluted with a variety of buffers. High and low affinity binding situations were observed under different conditions. Low affinity binding could only be detected at the high lipase-colipase concentrations encountered during batch purification (10(-3)-10(-4) M). Even in this situation the rapid dissociation of the weak complex during filtration resulted in considerable separation of the two proteins. High affinity binding of lipase to colipase was observed at protein eluant concentrations as low as 10(-8) M on columns equilibrated with oleic acid-taurodeoxycholate mixed micelles. This binding did not take place on columns equilibrated with simple bile salt and mixed phosphatidylcholine-cholesterol-bile salt micelles. Colipase alone exhibited strong binding to phosphatidylcholine and fatty acid mixed bile salt micelles when applied together in a sample on columns eluted with pure bile salt micelles, lipase did not. The relevance of the high affinity complex to the lipase . colipase . substrate complex is discussed.
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Patton JS, Andersson L. Immobilized pancreatic lipase and colipase for purification and binding studies. FEBS Lett 1978; 86:179-82. [PMID: 624401 DOI: 10.1016/0014-5793(78)80558-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Lairon D, Nalbone G, Lafont H, Leonardi J, Domingo N, Hauton JC, Verger R. Inhibition of lipase adsorption at interfaces. Role of bile salt micelles and colipase. Biochemistry 1978; 17:205-8. [PMID: 619984 DOI: 10.1021/bi00595a001] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The effects of bile salts and colipase on the adsorption of lipase at an interface were studied by hydrophobic affinity chromatography on phenyl- and octyl-Sepharose. In the absence of bile salts, lipase or colipase binds separately to the gel. This is unchanged in the presence of adsorbed bile salts, when one bile salt molecule is associated per hydrophobic ligand. The same data are obtained in the presence of monomeric bile salt solutions. In contrast, lipase adsorption is totally prevented in a micellar bile salt solution. These results favor the idea that the formation of a lipase-bile salt complex in solution is responsible for the lack of interfacial lipase adsorption.
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Wieloch T, Falk KE. An NMR study of a tyrosine and two histidine residues in the structure of porcine pancreatic colipase. FEBS Lett 1978; 85:271-4. [PMID: 23316 DOI: 10.1016/0014-5793(78)80471-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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26
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Borgström B. Mode of action of pancreatic colipase. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 1978; 101:69-78. [PMID: 665388 DOI: 10.1007/978-1-4615-9071-2_7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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27
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Borgström B, Donnér J. The polar interactions between pancreatic lipase, colipase and the triglyceride substrate. FEBS Lett 1977; 83:23-6. [PMID: 923820 DOI: 10.1016/0014-5793(77)80633-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Erlanson C, Barrowman JA, Borgström B. Chemical modifications of pancreatic colipase. BIOCHIMICA ET BIOPHYSICA ACTA 1977; 489:150-62. [PMID: 562191 DOI: 10.1016/0005-2760(77)90241-7] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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29
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Borgström B. The action of bile salts and other detergents on pancreatic lipase and the interaction with colipase. BIOCHIMICA ET BIOPHYSICA ACTA 1977; 488:381-91. [PMID: 561621 DOI: 10.1016/0005-2760(77)90197-7] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Verger R, Rietsch J, Desnuelle P. Effects of colipase on hydrolysis of monomolecular films by lipase. J Biol Chem 1977. [DOI: 10.1016/s0021-9258(17)40267-5] [Citation(s) in RCA: 71] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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