NCBI Logo
GEO Logo
   NCBI > GEO > Accession DisplayHelp Not logged in | LoginHelp
GEO help: Mouse over screen elements for information.
          Go
Series GSE8530 Query DataSets for GSE8530
Status Public on Jul 20, 2007
Title The chaplins: a family of hydrophobic cell-surface proteins involved in aerial mycelium formation
Organism Streptomyces coelicolor
Experiment type Expression profiling by array
Summary The filamentous bacterium Streptomyces coelicolor differentiates by forming specialized, spore-bearing aerial hyphae that grow into the air. Using microarrays, we identified genes that are down-regulated in a mutant unable to erect aerial hyphae. Through this route, we identified a previously unknown layer of aerial mycelium surface proteins (the "chaplins"). The chaplins share a hydrophobic domain of ~40 residues (the "chaplin domain"), and all have a secretion signal. The five short chaplins (ChpD,E,F,G,H) have one chaplin domain, whereas the three long chaplins (ChpA,B,C) have two chaplin domains and a C-terminal "sorting signal" that targets them for covalent attachment to the cell wall by sortase enzyme. Expression of the two chaplin genes examined (chpE, chpH) depended on aerial hyphae formation but not sporulation, and egfp fusions showed their expression localized to aerial structures. Mass spectrometry of cell wall extracts confirmed that the short chaplins localized to the cell surface. Deletion of chaplin genes caused severe delays in aerial hyphae formation, a phenotype rescued by exogenous application of chaplin proteins. These observations implicate the chaplins in aerial mycelium formation, and suggest that coating of the envelope by the chaplins is required for aerial hyphae to grow out of the aqueous environment of the substrate mycelium into the air.
Set of arrays organized by shared biological context, such as organism, tumors types, processes, etc.
Keywords: Logical Set
 
Overall design User Defined
 
Contributor(s) Karoonuthaisiri N
Citation(s) 12832397
Submission date Jul 19, 2007
Last update date Mar 17, 2012
Organization Stanford Microarray Database (SMD)
E-mail(s) [email protected]
Phone 650-498-6012
URL http://genome-www5.stanford.edu/
Department Stanford University, School of Medicine
Street address 300 Pasteur Drive
City Stanford
State/province CA
ZIP/Postal code 94305
Country USA
 
Platforms (1)
GPL2620 ScoKao_03-05-20
Samples (13)
GSM211781 J1501 KCl 0min vs 05min
GSM211782 J1501 KCl 0min vs 15min
GSM211783 J1501 KCl 0min vs 30min
Relations
BioProject PRJNA101661

Download family Format
SOFT formatted family file(s) SOFTHelp
MINiML formatted family file(s) MINiMLHelp
Series Matrix File(s) TXTHelp

Supplementary data files not provided
Processed data included within Sample table

| NLM | NIH | GEO Help | Disclaimer | Accessibility |
NCBI Home NCBI Search NCBI SiteMap