Linked Life Data

17825068

Source:http://linkedlifedata.com/resource/pubmed/id/17825068

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2007-10-16
pubmed:databankReference
pubmed:abstractText
The sgtR1 and sgtR2 genes encoding putative regulators similar to the Aha1 and ArsR families, respectively, were identified downstream from the sprT gene. To investigate their function, expression vectors containing various combinations of sprT, sgtR1, and sgtR2 were transformed into Streptomyces lividans and Streptomyces griseus. The trypsin activity levels produced by S. lividans harboring pWHM3-TR2 (sprT and sgtR2) or pWHM3-TR1R2 (sprT, sgtR2, and sgtR2) were, respectively, 6.6 or 8.9 times that of S. lividans transformed with pWHM3-T (sprT). In the pWHM3-TR1R2 transformant, the transcription of sprT consistently occurred during the earlier stages of growth and was maintained at a higher level throughout the 6 days of cultivation. Streptomyces griseus IFO13350 harboring pWHM3-TR1R2 also produced trypsin activity 2.1 times that of the pWHM3-T transformant. However, all S. griseus Delta adpA transformants produced lower SGT activity than the wild-type strain, and none could overcome the deficiency in AdpA transcriptional activator, suggesting that AdpA is an absolute prerequisite for sprT expression. The sprT transcript was detected at a high level only in the wild-type strain, but the sgtR1 and sgtR2 transcript levels were very similar between the S. griseus IFO13350 and Delta adpA strains. This clearly demonstrates that the transcription of the sgtR1 and sgtR2 genes is not dependent on AdpA and that they are therefore not members of the AdpA regulon.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0378-1097
pubmed:author
pubmed:issnType
Print
pubmed:volume
276
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
75-82
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Characterization of the sgtR1 and sgtR2 genes and their role in regulating expression of the sprT gene encoding Streptomyces griseus trypsin.
pubmed:affiliation
Department of Biological Science, Myongji University, Yongin, Korea.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't