Enterokinase Cleavage Enzyme (Mammalian Produced)

SKU:BHZ10900163
Overview
Click light‑blue chips for details
Recognition Sequence Asp-Asp-Asp-Asp-Lys (DDDDK)
Expression System Mammalian-produced
Shelf Life 3 years at −20°C
Operating Temp 37°C, pH 7.5–8.0
Options selector
Catalog no. Size
G699 100 Units
Field Specification
Mfr No G699
Product Type
  • Enzymes
  • Proteases
Storage We recommend that the vial be briefly centrifuged prior to opening to bring the contents to the bottom. The stock solutions should be distributed into working aliquots and store at -20°C. Avoid multiple freeze/thaw cycles. Stable for 3 years from the date of shipping when stored and handled as per instructions.
Enterokinase Cleavage Enzyme (EK1) is a highly pure and active endotoxin-free enterokinase that is produced using human cell line in serum free media. It is highly specific for cleaving fusion proteins with the recognition sequence, Asp-Asp-Asp-Asp-Lys (DDDDK). Because it is produced using human cell line, it has the appropriate glycosylation to catalyze highly accurate cleavage reaction with minimum non-specific activity. Its activity is stable over a broad temperature range, and it completes the reaction from 4°C to 60°C.
 
Unlike other site-specific proteases that cut within the recognition sequences leaving extra amino acids in the cleaved peptide products, the EK1 cleaves after the C-terminal end of the lysine residue, and the fragment produced from the cleavage reaction does not inherit any residues from the DDDDK recognition sequence. Therefore, the application can be extremely advantageous for producing a 100% native protein sequence and structure from recombinant fusion protein, which has the desired product immediately after the enterokinase recognition sequence, DDDDK.
 
Owing to the presence of a His tag , EK1 can be easily removed after the cleavage reaction by affinity chromatography with Ni-IDA Agarose Beads. In addition, DDDDK is a part of the octapeptide FLAG tag (DYKDDDDK), which can be utilized as a fusion tag for recognition by antibody, and for detection of fusion protein expression with Western blot analysis, as well as for purification of the fusion protein by Anti-FLAG affinity chromatography. This array of applications makes EK1 an ideal tool in the research involving the study of protein structure and function, and protein production where native protein structures and sequences are desired.
 
Special Features
  • Endotoxin free (i.e., produced in mammalian cells and purified from serum free media)
  • lycosylated for improved efficiency and stability
  • Rapid cleavage (95% cleavage in 1hr)
  • Highly specific with minimum non-specific cleavage (even at 20x concentration)
  • Stable over broad temperature range
  • His-tagged for convenient removal post reaction
Specification Value
Enzyme Type Protease
Format Enzyme Only
Storage Conditions We recommend that the vial be briefly centrifuged prior to opening to bring the contents to the bottom. The stock solutions should be distributed into working aliquots and store at -20°C. Avoid multiple freeze/thaw cycles. Stable for 3 years from the date of shipping when stored and handled as per instructions.

Enterokinase cleaves after the sequence D-D-D-D-K (DDDDK↓), which is typically placed between an affinity tag (His₆, GST, MBP) and the protein of interest. Cleavage leaves no additional residues on the N-terminus of the target protein.

Yeasen Biotechnology supports custom enzyme solutions across multiple service lines — from GMP-grade bulk supply to directed enzyme engineering. Contact BioHippo to discuss requirements and initiate a project inquiry.

▶ GMP-Grade & Bulk Supply

Select Yeasen enzymes are available in GMP grade, manufactured in an ISO 13485-certified UCF.ME™ ultra-clean molecular enzyme facility with FDA Drug Master File (DMF) support.

  • GMP-grade release testing and CoA documentation
  • ISO 13485-certified production facility
  • Scalable from milligram to multi-gram quantities
  • Consistent lot-to-lot activity specifications

▶ Glycerol-Free & Custom Formulation

Glycerol-free enzyme formats are available for applications requiring lyophilization compatibility, liquid handling automation, or direct IVD master mix integration.

  • Glycerol-free liquid format (standard and custom buffers)
  • Lyophilization-ready enzyme preparation
  • Custom reaction buffer optimization for specific assay conditions
  • Compatible with freeze-drying workflows for point-of-care formats

▶ Molecular IVD RDC Service

Yeasen's Research and Development Contracting (RDC) team delivers end-to-end solutions for molecular diagnostic product development, covering enzyme selection through clinical validation support.

  • Enzyme selection and performance matching
  • Primer/probe design and reaction buffer optimization
  • Sensitivity, specificity, and precision validation studies
  • Stability studies and SNP evaluation
  • Instrument platform compatibility assessment

▶ ZymeEditor™ Enzyme Engineering

Yeasen's proprietary ZymeEditor™ directed evolution and rational design platform enables the development of custom enzyme variants with tailored performance characteristics not available in off-the-shelf products.

  • Directed evolution for enhanced thermostability, processivity, or fidelity
  • Rational design for altered substrate specificity or cofactor requirements
  • Library screening from Yeasen's proprietary enzyme variant collection
  • Scale-up to commercial quantities upon candidate confirmation

ⓘ Customization services are fulfilled by Yeasen Biotechnology. Lead times and minimum order quantities vary by service type. Contact BioHippo for project scoping and pricing.

References

  1. Osakowicz C; Fletcher L; Caswell JL et al.. Protective and Anti-Inflammatory Effects of Protegrin-1 on Citrobacter rodentium Intestinal Infection in Mice. International journal of molecular sciences. 2021;22. DOI
  2. Laukkanen MO; Cammarota F; Esposito T et al.. Extracellular superoxide dismutase regulates the expression of small gtpase regulatory proteins GEFs, GAPs, and GDI. PloS one. 2015;10:e0121441. DOI

Get a Quote

Please use this form for bulk quantity requests or customized products.

Contact Information

Product Information

Try Celltrypse Free – Request Your Sample Today

Experience the power of Celltrypse™, c-LEcta's innovative enzyme solution for gentle and efficient cell dissociation. Request your free sample and discover a superior alternative for your cell culture workflows.

Try Celltrypse Free – Request Your Sample Today

Try Celltrypse Free – Request Your Sample Today

Experience the power of Celltrypse™, c-LEcta's innovative enzyme solution for gentle and efficient cell dissociation. Request your free sample and discover a superior alternative for your cell culture workflows.

Try Celltrypse Free – Request Your Sample Today