Journal
ACS CHEMICAL BIOLOGY
Volume 7, Issue 8, Pages 1326-1330Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cb300238w
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Funding
- National Institutes of Health grant [NIH R01 GM062523]
- Institute for Collaborative Biotechnologies from the U.S. Army Research Office [W911NF-09-0001]
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Transcriptional activity from a specified promoter can provide a useful marker for the physiological state of a cell. Here we introduce a method for selective tagging of proteins made in cells in which specified promoters are active. Tagged proteins can be modified with affinity reagents for enrichment or with fluorescent dyes for visualization. The method allows state-selective analysis of the proteome, whereby proteins synthesized in predetermined physiological states can be identified. The approach is demonstrated by proteorne-wide labeling of bacterial proteins upon activation of the P-BAD promoter and the SoocRS regulon and provides a basis for analysis of more complex systems including spatially heterogeneous microbial cultures and biofilms.
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