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Cholesterol Esterase Enzyme | CEL enzyme

Cholesterol Esterase (Carboxyl Ester Lipase, CEL, Lysophosphatidylcholine, Bile salt-stimulated lipase, BAL, BSDL, BSSL, Bucelipase, CEase, CELL,, lysoPC, PTL, Pancreatic triglyceride lipase, FAP, FAPP, LIPA, MODY8, Pancreatic lysophospholipase, Sterol es

Gene Names
CEL; BAL; FAP; BSDL; BSSL; CELL; FAPP; LIPA; CEase; MODY8
Synonyms
Cholesterol Esterase; Cholesterol Esterase (Carboxyl Ester Lipase; CEL; Lysophosphatidylcholine; Bile salt-stimulated lipase; BAL; BSDL; BSSL; Bucelipase; CEase; CELL; ; lysoPC; PTL; Pancreatic triglyceride lipase; FAP; FAPP; LIPA; MODY8; Pancreatic lysophospholipase; Sterol es; Sterol e; CEL enzyme
Ordering
For Research Use Only!
Form/Format
Supplied as a lyophilized powder.
Concentration
1.57mg/ml (varies by lot)
Optimal pH
For esterification: 6.1-6.2
For hydrolysis: 6.6-7.0 (17).
Active Site Residues
Serine: (S194)
Histidine: (H435)
Aspartate: (D320)
Activators
Bile Salts, Cholate, glycocholate, taurocholate (18).
Inhibitors
PMSF and p-chloromercuribenzoate (8) Diisopropyl fluorophosphate (Momsen and Brockman 1976) Hg2+, Ag+, and ionic detergents Aryl carbamates (Feaster et al. 1996)
Protease
9.3/unit
Activity (u/gm dw)
1660
Unit Definition
1 unit hydrolyzes 1 umole of cholesterol ester per minute at 37ºC, pH 7.0.
Reconstitution
Reconstitute with sterile 0.1M PBS to 1mg/ml.
Preparation and Storage
Lyophilized and reconstituted products are stable for 6 months after receipt at -20°C. Reconstitute with sterile PBS. Aliquot to avoid repeated freezing and thawing. Store at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.
Related Product Information for CEL enzyme
The enzyme is bound to cellular membranes of excitable tissue (synaptic junction, endoplasmic reticulum, etc.). It is believed to be associated with nerve impulse conduction.
Product Categories/Family for CEL enzyme

NCBI and Uniprot Product Information

NCBI GI #
NCBI GeneID
UniProt Accession #
Molecular Weight
Monomer: 65kD (8)
Hexamer: 400kD (8)
NCBI Official Full Name
cholesterol esterase
NCBI Official Synonym Full Names
carboxyl ester lipase
NCBI Official Symbol
CEL
NCBI Official Synonym Symbols
BAL; FAP; BSDL; BSSL; CELL; FAPP; LIPA; CEase; MODY8
NCBI Protein Information
bile salt-activated lipase; bucelipase; sterol esterase; cholesterol esterase; carboxyl ester hydrolase; fetoacinar pancreatic protein; lysophospholipase, pancreatic; bile salt-dependent lipase, oncofetal isoform; carboxyl ester lipase (bile salt-stimulated lipase)
UniProt Protein Name
Bile salt-activated lipase
UniProt Gene Name
CEL
UniProt Synonym Gene Names
BAL; BAL; BSSL
UniProt Entry Name
CEL_HUMAN

NCBI Description

The protein encoded by this gene is a glycoprotein secreted from the pancreas into the digestive tract and from the lactating mammary gland into human milk. The physiological role of this protein is in cholesterol and lipid-soluble vitamin ester hydrolysis and absorption. This encoded protein promotes large chylomicron production in the intestine. Also its presence in plasma suggests its interactions with cholesterol and oxidized lipoproteins to modulate the progression of atherosclerosis. In pancreatic tumoral cells, this encoded protein is thought to be sequestrated within the Golgi compartment and is probably not secreted. This gene contains a variable number of tandem repeat (VNTR) polymorphism in the coding region that may influence the function of the encoded protein. [provided by RefSeq, Jul 2008]

Uniprot Description

Function: Catalyzes fat and vitamin absorption. Acts in concert with pancreatic lipase and colipase for the complete digestion of dietary triglycerides.

Catalytic activity: Triacylglycerol + H2O = diacylglycerol + a carboxylate. Ref.9A steryl ester + H2O = a sterol + a fatty acid. Ref.9

Enzyme regulation: Activated by bile salts containing a 7-hydroxyl group.

Subunit structure: Interacts with CLC. Ref.13

Subcellular location: Secreted.

Tissue specificity: Mammary gland and pancreas. Expressed by eosinophils. Ref.13

Involvement in disease: Maturity-onset diabetes of the young 8 with exocrine dysfunction (MODY8) [MIM:609812]: A form of diabetes that is characterized by an autosomal dominant mode of inheritance, onset in childhood or early adulthood (usually before 25 years of age), a primary defect in insulin secretion and frequent insulin-independence at the beginning of the disease.Note: The disease is caused by mutations affecting the gene represented in this entry. The disease can be caused by frameshift deletions in the variable number of tandem repeats (VNTR)-containing exon 11 of the CEL gene (Ref.15). Ref.15

Sequence similarities: Belongs to the type-B carboxylesterase/lipase family.

Biophysicochemical propertiesKinetic parameters:KM=24 µM for lipoyl-4-aminobenzoate Ref.9KM=15 µM for triacetinVmax=45.5 pmol/min/mg enzyme toward lipoyl-4-aminobenzoateVmax=323 pmol/min/mg enzyme toward triacetin

Sequence caution: The sequence AAA51973.1 differs from that shown. Reason: Erroneous initiation. The sequence AAA52014.1 differs from that shown. Reason: Erroneous initiation. The sequence AAC26514.1 differs from that shown. Reason: Erroneous initiation. The sequence CAA38325.1 differs from that shown. Reason: Erroneous initiation. The sequence CAI13412.1 differs from that shown. Reason: Erroneous initiation. The sequence EAW88033.1 differs from that shown. Reason: Erroneous initiation.

Research Articles on CEL

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Product Notes

The CEL cel (Catalog #AAA653957) is an Enzyme and is intended for research purposes only. The product is available for immediate purchase. It is sometimes possible for the material contained within the vial of "Cholesterol Esterase, Enzyme" to become dispersed throughout the inside of the vial, particularly around the seal of said vial, during shipment and storage. We always suggest centrifuging these vials to consolidate all of the liquid away from the lid and to the bottom of the vial prior to opening. Please be advised that certain products may require dry ice for shipping and that, if this is the case, an additional dry ice fee may also be required.

Precautions

All products in the AAA Biotech catalog are strictly for research-use only, and are absolutely not suitable for use in any sort of medical, therapeutic, prophylactic, in-vivo, or diagnostic capacity. By purchasing a product from AAA Biotech, you are explicitly certifying that said products will be properly tested and used in line with industry standard. AAA Biotech and its authorized distribution partners reserve the right to refuse to fulfill any order if we have any indication that a purchaser may be intending to use a product outside of our accepted criteria.

Disclaimer

Though we do strive to guarantee the information represented in this datasheet, AAA Biotech cannot be held responsible for any oversights or imprecisions. AAA Biotech reserves the right to adjust any aspect of this datasheet at any time and without notice. It is the responsibility of the customer to inform AAA Biotech of any product performance issues observed or experienced within 30 days of receipt of said product. To see additional details on this or any of our other policies, please see our Terms & Conditions page.

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