Linked Life Data

15129728

Source:http://linkedlifedata.com/resource/pubmed/id/15129728

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2004-5-7
pubmed:abstractText
Enterokinase (EC 3.4.21.9) is a serine proteinase with a specific digest sequence (Asp)4-Lys in the duodenum. Its high specificity for the recognition site makes enterokinase (EK) a useful tool for an in vitro cleavage of fusion proteins. In this work, an active bovine enterokinase light chain (EK(L)) was produced in secretory form by a recombinant strain of the methylotrophic yeast Pichia pastoris. The influences of methanol utilization phenotype of the host strain, induction pH, and carbon source on the recombinant production were studied. The production of recombinant EK(L) by Mut(s) strain was much higher than that by Mut+ strain. When inducted at pH 6.0, on a glycerol/methanol medium, the concentration of recombinant EK(L) (rEK(L)) reached 350 mg l(-1), which was 20-fold higher than that reported previously. The recombinant EK(L) was purified in a simple procedure on the anion exchange chromatography and 15 mg pure active EK(L) were obtained from 100 ml culture broth supernatant. The specific activity of purified rEK(L) was approximately 9000 u mg(-1). To facilitate purification and removal of rEKL after cleavage of fusion protein, the C-terminal His-tagged EK(L) (EK(L)/His) was also expressed in P. pastoris, and this His-tagged EK(L) exhibited a similar enzymatic activity to the untagged EK(L).
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0168-1656
pubmed:author
pubmed:issnType
Print
pubmed:day
4
pubmed:volume
108
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
185-92
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
High-level secretory production of recombinant bovine enterokinase light chain by Pichia pastoris.
pubmed:affiliation
The Open Laboratory for Marine Functional Genomics of State High-Tech Development, Department of Biochemistry, College of Life Sciences, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, PR China.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't, Evaluation Studies