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62310 Sigma-Aldrich

Lipase from Rhizopus niveus

powder (fine), ≥1.5 U/mg

Synonym: Triacylglycerol acylhydrolase, Triacylglycerol lipase

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Properties

Related Categories 3.1.x.x Acting on esters, 3.x.x.x Hydrolases, Application Index, Biochemicals and Reagents, Diagnostic and Analytical Enzymes,
Quality Level   100
form   powder (fine)
specific activity   ≥1.5 U/mg
mol wt   Mr ~83000
storage temp.   2-8°C

Description

General description

Lipases hydrolyze ester bonds of triacylglycerols and in some conditions, catalyze the synthesis of ester bonds by transesterification. Lipase from Rhizopus niveus exists as a single polypeptide chain with a molecular mass of about 30-34kDa.

Application

Lipase from Rhizopus niveus has been used to determine the positional distribution of fatty acids within triacylglycerol by hydrolysis of the acyl ester linkage at C-1 and C-3. It has also been used to induce intragastric lipolysis and study its effects on felodipine (a medication) release from a hydrophilic, extended release tablet.

Biochem/physiol Actions

Lipase from Rhizopus niveus is specifically used to produce cocoa butter substitutes.

Tri-, di-, and monoglycerides are hydrolyzed (in decreasing order of rate).

Unit Definition

1 U corresponds to the amount of enzyme which liberates 1 μmol fatty acid from a triglyceride per minute at pH 7.7 and 40°C (olive oil as substrate)]; 300 U as described above are equivalent to ~1 U using triolein, Cat. No. 62314, at pH 8.0 and 40°C as substrate.

Other Notes

Note: When triacetin is used as substrate, the pH is 7.4. Incubation time: 60 minutes.

Substrate specificity: preferentially hydrolyzes the 1- and 3-positions(middle to long fatty acids); optimum pH 5.0-7.0; optimum temperature 30-45°C; Selective enzymatic removal of protecting functions (C-terminal COOH function)

Safety & Documentation

Safety Information

Personal Protective Equipment 
RIDADR 
NONH for all modes of transport
WGK Germany 
WGK 1
RTECS 
TO9776500
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable

Documents

Certificate of Analysis (COA)

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Protocols & Articles

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