Linked Life Data

15801785

Source:http://linkedlifedata.com/resource/pubmed/id/15801785

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2005-4-1
pubmed:abstractText
This work deals with the separation of Tat protein from a complex fermentation broth using an affinity membrane system. Tat is a regulatory protein that is critical for HIV-1 replication and thus a potential candidate for vaccine and drug development. Furthermore, Tat can facilitate transport of exogenous molecules across cell membranes and is implicated in pathogenesis of HIV dementia. Affinity membranes were prepared through coupling of avidin within a 4-stack membrane construct. Tat (naturally biotinylated) accessibility in the bacterial lysate feed was influenced by the presence of RNAse, protein concentration, and ionic strength. Enhanced accessibility translated to a marked increase in the overall product yield per pass. The purity of the membrane-isolated Tat was compared to that prepared via packed column chromatography through SDS-PAGE, Western blot, activity assay, and neurotoxicity studies. Tat protein produced via membrane separation yielded primarily monomeric forms of the oligopeptide sequence, whereas column chromatography produced predominately polymeric forms of Tat. These differences resulted in changes in the neurotoxicity and cellular uptake of the two preparations.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
8756-7938
pubmed:author
pubmed:issnType
Print
pubmed:volume
21
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
451-9
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:articleTitle
Selective isolation and purification of tat protein via affinity membrane separation.
pubmed:affiliation
Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506-0046, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S., Research Support, N.I.H., Extramural