Linked Life Data

10649231

Source:http://linkedlifedata.com/resource/pubmed/id/10649231

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2000-3-22
pubmed:abstractText
We have constructed three plasmid vectors for the expression of green fluorescent protein (GFP) fusion proteins using the following motif: (His)(6)-GFP-EK-X, where X represents chloramphenicol acetyl-transferase (CAT), human interleukin-2 (hIL-2), and organophosphorous hydrolase (OPH), respectively, (His)(6) represents a histidine affinity ligand for purification, and EK represents an enterokinase cleavage site for recovering the protein-of-interest from the fusion. The CAT and OPH fusion products ( approximately 63 kDa GFP/CAT and approximately 70 kDa GFP/OPH) were expressed at 4.85 microg/mL (19.9 microg/mg-total protein) and 1.42 microg/mL (4.2 microg/mg-total protein) in the cell lysis supernatant, and, in both cases, enzymatic activity was retained while coupled to GFP. In the case of hIL-2 fusion ( approximately 52 kDa), however, the GFP fluorescence was significantly reduced and most of the fusion was retained in the cell pellet. Linear relationships between GFP fluorescence and CAT or OPH concentration, and with enzymatic activity of CAT or OPH, indicated, for the first time, that in vivo noninvasive quantification of proteins-of-interest, was made possible by simple measurement of GFP fluorescence intensity. The utility of GFP as a reporter was not realized without disadvantages however, in particular, an incremental metabolic cost of GFP was found. This could be offset by many benefits foreseen in expression and purification efficiencies.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0006-3592
pubmed:author
pubmed:copyrightInfo
Copyright 2000 John Wiley & Sons, Inc.
pubmed:issnType
Print
pubmed:day
5
pubmed:volume
67
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
565-74
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
Observations of green fluorescent protein as a fusion partner in genetically engineered Escherichia coli: monitoring protein expression and solubility.
pubmed:affiliation
Center for Agricultural Biotechnology, University of Maryland Biotechnology Institute, College Park, Maryland 20742, USA. hjcha@postech.ac.kr
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S.