{ "ProductData": { "RelatedLinks": "", "RegulatoryDisclaimer1": "For life science research only. Not for use in diagnostic procedures.", "RegulatoryDisclaimer2": "", "StainLocalization": [ "" ], "ProductType": "Others", "DisclaimerGroup2": null, "ProductNameGlobal": "alpha-2 3-Sialyltransferase rec.", "DisclaimerGroup1": "LSR", "ControlTissue": [ "" ], "BrandName": "α-2,3-Sialyltransferase, rec.", "LicenseDisclaimers": [ { "Order": "78", "Identifier": "1403506419168", "LongText": "The sale of the Product does not exhaust or grant any rights in third party patents including patents of companies of the F. Hoffmann - La Roche AG group of companies, in particular, for the use of modified antibodies obtained by using the product." } ], "Isotypes": "", "RegulatoryDisclaimer3": "", "ID": "", "ProductNameAddition": "human, expressed in HEK-293F, solution", "Species": [ "" ], "Clone": "" }, "ProductImageDetails": { "ImagePath": "https://pim-media.roche.com/Images/CB_IMAGE.png", "ImageType": "Image main" }, "Product2Taxomony": { "Product2TaxomonyReferences": [ { "StructureSystemIdentifier": "Product_Grouping", "StructureSystemName": "Product Grouping", "NodeName": "In vitro Glycoengineering", "NodeID": "02-0052" }, { "StructureSystemIdentifier": "OWP_Product_Types", "StructureSystemName": "Product Types", "NodeName": "Glycosyltransferases", "NodeID": "70-025-00" }, { "StructureSystemIdentifier": "OWP_Organization", "StructureSystemName": "Organization", "NodeName": "CustomBiotech and LifeScience", "NodeID": "01-01-01-07-00" }, { "StructureSystemIdentifier": "Product_Grouping", "StructureSystemName": "Product Grouping", "NodeName": "Enzymes", "NodeID": "02-0014" }, { "StructureSystemIdentifier": "Product_Solutions", "StructureSystemName": "Product Solutions", "NodeName": "CustomBiotech", "NodeID": "520" }, { "StructureSystemIdentifier": "Lab_Type", "StructureSystemName": "Lab Types", "NodeName": "Manufacturing", "NodeID": "180-00" }, { "StructureSystemIdentifier": "Applications", "StructureSystemName": "Applications", "NodeName": "NOT APPLICABLE", "NodeID": "99-00-00" }, { "StructureSystemIdentifier": "OWP_Techniques", "StructureSystemName": "Techniques", "NodeName": "NOT APPLICABLE", "NodeID": "999-00" }, { "StructureSystemIdentifier": "Disease_Areas", "StructureSystemName": "Disease Areas", "NodeName": "NOT APPLICABLE", "NodeID": "99-00-00" }, { "StructureSystemIdentifier": "Pathogens", "StructureSystemName": "Pathogens", "NodeName": "NOT APPLICABLE", "NodeID": "99-00-00" }, { "StructureSystemIdentifier": "OWP_Family", "StructureSystemName": "Product Families", "NodeName": "NOT APPLICABLE", "NodeID": "999" }, { "StructureSystemIdentifier": "Health_Topics", "StructureSystemName": "Health Topics", "NodeName": "NOT APPLICABLE", "NodeID": "99-00-00" } ] }, "Product2Materials": { "P2MaterialReferences": [ { "MaterialNum": "07429916103", "MaterialDescription": "alpha-2,3-Sialyltransferase, rec.", "RegisteredProductName": "alpha-2,3-Sialyltransferase, rec.", "GTIN": "07613336130766", "ProductCategoryText": "Reagents, kits", "OldMaterialNumber": "", "PackSizePIM360": "custom fill", "PackSizeDescPIM360": "", "MaterialAnnotation": "CustomBiotech product. Please contact your local representative.", "ReadyForUse": "", "OrderInformation": "Unit of measure is \"mg\"." } ] }, "Product2Products": { "Product2ProductReference": [ ] }, "ProductSpec": [ { "ProductSpecVariant": { "Chapters": [ { "Language": "en", "Value": "34.5 kDa", "Name": "Molecular Weight" }, { "Language": "en", "Value": "Procedure and Assay Conditions

The optimal reaction conditions for sialylation of a target protein can be different for each application. Therefore, the presented protocol can only serve as a suggested starting protocol. Optimization of reaction conditions (e.g., with different enzyme-IgG-ratios) is recommended to determine the optimal conditions for each application.

1   Preparation of the reaction buffer, containing 6.1 mM CMP-NANA, 200 mM MES, pH 6.5.
•Dissolve 40 mg CMP-NANA and 390.4 mg MES in 6 ml of water.
•Adjust pH to 6.5.
•Adjust to a final volume of 10 ml with water.
2   Setting up the sialylation reaction, containing 500 μg CMP-NANA, 100 mg ST3Gal-6, 1 mg IgG.
Pipet the following solutions into a reaction tube:
•125 μl reaction buffer
•100 μl IgG (10 mg/ml, pH 6)
•18 μl α-2,3-Sialyltransferase
•7 μl water
3   Incubate the reaction at +37°C.
4   Stop the reaction by freezing the tube at -15 to -25°C.
Analyze the samples

It is recommended to set up several identical reactions and stop them at different time points (e.g., 2 h, 8 h, 24 h) to plot the kinetics for each application.


Samples were analyzed by electrospray ionization mass spectrometry and the content of G2+0SA, G2+1SA, and G2+2SA N-glycans was determined.
Instrument: Synapt G2 HDMS device (Waters, UK)
Software: MassLynx V 4.1
 ", "Name": "Protocols" }, { "Language": "en", "Value": "Unit of measure is \"mg\".", "Name": "CB - Order Information" }, { "Language": "en", "Value": "As an example, highly galactosylated humanized monoclonal antibodies IgG1 and IgG4 are used for the kinetics.

Kinetics of α-2,3-Sialytransferase with IgG1
Maximal biantennary sialylation of IgG1 is observed after 24 hours (G2 + 2SA).

Kinetics of α-2,3-Sialytransferase with IgG4
Maximal biantennary sialylation of IgG4 is obtained after 8 hours (G2 + 2SA).", "Name": "Results" }, { "Language": "en", "Value": "For in vitro sialylation of all Galß1-4GlcNAc units on glycoproteins and complex molecules such as human monoclonal antibodies (MAB), use α-2,3-Sialyltransferase (ST3Gal-6) and CMP-N-Acetylneuraminic Acid (CMP-NANA).", "Name": "Applications (IFU)" }, { "Language": "en", "Value": "
Vial / Bottle Label Function / Description Content
1 α-2,3-Sialyltransferase rec. Enzyme
Storage buffer contains
50 mM MES, 200 mM NaCl, pH 6.4 at +4°C
", "Name": "Content" }, { "Language": "en", "Value": "No animal-derived material is added in fermentation, purification and final formulation of this enzyme.", "Name": "Quality Control" }, { "Language": "en", "Value": "Incubation of α-2,3-Sialyltansferase and CMP-NANA with a glycoprotein leads to increased sialylation of the glycoprotein.

As α-2,3-Sialyltansferase rec. adds sialic acid only to galactosylated glycostructures, a galactosylation of the glycoprotein in a previous step helps to achieve higher sialylation levels. Galactosylation can be achieved by incubation of the target protein with ß-1,4-Galactosyltransferase and UDP-Galactose.", "Name": "Applications" }, { "Language": "en", "Value": "α-2,3-Sialyltransferase, rec. can be used for in vitro glycoengineering of glycoproteins, e.g. therapeutic proteins.", "Name": "Positioning" }, { "Language": "en", "Value": "Benefits of using in vitro glycoengineering to modify glycosylation of therapeutic proteins:
  • Time- and cost-saving generation of glycan variants to facilitate drug development.
  • Optimized glycosylation without compromising other CQAs or product yield.
  • Improved lot-to-lot consistency to reduce risk of product quality variation and resulting delays.
  • Generation of glycoprofiles which may not otherwise be generated.
  • Streamlined analytics in comparability studies.
", "Name": "Benefits" }, { "Language": "en", "Value": "α-2,3-Sialyltansferase, rec. is a highly active recombinant human glycosyltransferase, expressed in HEK-293F.", "Name": "Product Description" }, { "Language": "en", "Value": "Appearance: Clear, colorless to slightly colored solution.
Composition: 50 mM MES, 200 mM NaCl, pH 6.4 ± 0.1 at +4°C
Specific activity: ≥80 U/μg
Protein A280nm ( 1 mg/mL) = 0.877: 5.5 ± 0.5 mg/mL
Purity: ≥90%
Bioburden: ≤100 CFU/mL (in evaluation)
Endotoxin: ≤10 EU/mg (in evaluation)
Stability: At -15 to -25°C within specification range for 12 months.
", "Name": "Specification" }, { "Language": "en", "Value": "Molar mass: 34.5 kDa by cDNA", "Name": "Properties" } ] } } ] }

α-2,3-Sialyltransferase, rec.

human, expressed in HEK-293F, solution




Technical documents

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