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L6007

Sigma-Aldrich

Leucine Aminopeptidase, microsomal from porcine kidney

Type VI-S, lyophilized powder, ≥12 units/mg protein (biuret)

Synonym(s):

Aminopeptidase M, Aminopeptidase N, Cathepsin III, LAP, Leucinamide aminopeptidase, Leucinaminopeptidase

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About This Item

CAS Number:
9054-63-1
Enzyme Commission number:
3.4.11.2 (BRENDA, IUBMB)
EC Number:
232-942-5
MDL number:
MFCD00131501
UNSPSC Code:
12352204
NACRES:
NA.54
Pricing and availability is not currently available.

biological source

Porcine kidney

Quality Level

200

type

Type VI-S

form

lyophilized powder

specific activity

≥12 units/mg protein (biuret)

mol wt

320 kDa

composition

Protein, 30-70%

storage temp.

−20°C

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General description

Leucine Aminopeptidase (LAP) from porcine is a 320-kDa exopeptidase present in cytosol.[1] It contains zinc in its structure and belongs to the M1 and M17 peptidase families.[2] LAP display bi-lobed structure and has the catalytic domain at the C-terminus and a variable N-terminal domain.[3]

Application

Leucine Aminopeptidase, microsomal from porcine kidney has been used in aminopeptidase N (APN) inhibitor screening assay in adenocarcinoma cell line ES-2[4] and in the inhibition kinetic studies with APN inhibitor.[5][6]

Biochem/physiol Actions

Leucine Aminopeptidase (LAP) catalyzes protein hydrolysis at the leucine residue at N-terminal.[1] An altered level of LAP is implicated in tumor proliferation and progression. LAP is a potential biomarker for ovarian epithelial cancer therapy.[2] Porcine LAP hydrolyzes glycine and arginine substrates.[3]

Unit Definition

One unit will hydrolyze 1.0 μmole of L-leucine-p-nitroanilide to L-leucine and p-nitroaniline per min at pH 7.2 at 37 °C. (At 25 °C, approx. 40% of the activity at 37 °C is obtained.) The activity obtained using L-leucine p-nitroanilide as substrate is 2-5 times that obtained with L-leucinamide as substrate.

Physical form

Contains primarily phosphate buffer salts, pH 7.0

inhibitor

Product No.
Description
Pricing

Pictograms

Health hazardExclamation mark
GHS08,GHS07

Signal Word

Danger

Hazard Statements

H315,H319,H334,H335

Hazard Classifications

Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
0000313108
0000313107
0000313108
0000313107
0000280242

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Leucine aminopeptidases: diversity in structure and function
Matsui M, et al.
Biological Chemistry, 387(12), 1535-1544 (2006)
The effect of different species Aminopeptidase N Structure on the activity screening of Aminopeptidase N Inhibitor
Wang X, et al.
Biological & Pharmaceutical Bulletin, 33(10), 1658-1665 (2010)
Novel and highly sensitive fluorescent assay for leucine aminopeptidases
Huang H, et al.
Analytical biochemistry, 391(1), 11-16 (2009)
Refolding of hexameric porcine leucine aminopeptidase using a cationic detergent and dextrin-10 as artificial chaperones
Laslo AC, et al.
Journal of Biotechnology, 140(3-4), 162-168 (2009)
Activity screening and structure-activity relationship of the hit compounds targeting APN/CD13
Wang X, et al.
Fundamental & Clinical Pharmacology, 25(2), 217-228 (2011)
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Questions

1–2 of 2 Questions  

  1. I would like to know the optimum solvent for dissolving, storing and using this reagent (Cat # L6007-25UN).

    1 answer

    1. According to the Enzymatic Assay for Leucine Aminopeptidase, Microsomal Enzyme Solution, prepare a solution containing 0.10 - 0.15 unit/ml of Leucine Aminopeptidase, Microsomal in cold deionized water immediately before use.

      More information can be found at https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/documents/356/218/l6007enz.pdf.

      This formulation contains phosphate buffer salts. For reconstitution, storage, and use of this product, 50 mM Sodium Phosphate Buffer, pH7.2, is a suitable solvent.

      Helpful?

  2. I recently purchased Leucine Aminopeptidase from porcine kidney Cat # L6007-25UN. I'd like to inquire how many mgs of protein is in one vial.

    1 answer

    1. The milligrams of protein per vial will depend on the units/mg protein defined on the product's certificate of analysis. For example, lot SLCM3898 reports specific activity of 19 units/mg protein. This results in approximately 1.3 mg of protein per vial for this particular lot. The protein content of this lot of material is reported at 61%, therefore the total mass of solid material in the 25UN vial will total around 2.2 mg.

      (Link to certificate of analysis: https://www.sigmaaldrich.com/certificates/sapfs/PROD/sap/certificate_pdfs/COFA/Q14/L6007-BULKSLCM3898.pdf)

      Helpful?

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