Linked Life Data

19216534

Source:http://linkedlifedata.com/resource/pubmed/id/19216534

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2009-6-8
pubmed:abstractText
The impact of environmental factors on the productivity of yeast cells is poorly investigated so far. Therefore, it is a major concern to improve the understanding of cellular physiology of microbial protein production hosts, including the methylotrophic yeast Pichia pastoris. Two-Dimensional Fluorescence Difference Gel electrophoresis and protein identification via mass spectrometry were applied to analyze the impact of cultivation temperature on the physiology of a heterologous protein secreting P. pastoris strain. Furthermore, specific productivity was monitored and fluxes through the central carbon metabolism were calculated. Chemostat culture conditions were applied to assess the adaption to different growth temperatures (20, 25, 30 degrees C) at steady-state conditions. Many important cellular processes, including the central carbon metabolism, stress response and protein folding are affected by changing the growth temperature. A 3-fold increased specific productivity at lower cultivation temperature for an antibody Fab fragment was accompanied by a reduced flux through the TCA-cycle, reduced levels of proteins involved in oxidative stress response and lower cellular levels of molecular chaperones. These data indicate that folding stress is generally decreased at lower cultivation temperatures, enabling more efficient heterologous protein secretion in P. pastoris host cells.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
1535-3893
pubmed:author
pubmed:issnType
Print
pubmed:volume
8
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1380-92
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
The effect of temperature on the proteome of recombinant Pichia pastoris.
pubmed:affiliation
Department of Biotechnology, BOKU-University of Natural Resources and Applied Life Sciences, Vienna, Austria.
pubmed:publicationType
Journal Article