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1. Microanatomy at Cellular Resolution and Spatial Order of Physiological Differentiation in a Bacterial Biofilm

Author:
Mika, Franziska,   et al.   ; Serra, Diego O.; Richter, Anja M.; Klauck, Gisela; Hengge, Regine;     Show all 5 Authors
Source:
mBio 2013 v.4 no.2 pp. e00103-13
ISSN:
2150-7511
Subject:
DNA-directed RNA polymerase; Escherichia coli; adenosine monophosphate; adhesins; amyloid; biofilm; cell differentiation; cyclic AMP; exopolysaccharides; extracellular matrix; flagellum; fluorescence; gene expression regulation; nutrients; physiology; scanning electron microscopy; second messengers; transcription factors
Abstract:
... Bacterial biofilms are highly structured multicellular communities whose formation involves flagella and an extracellular matrix of adhesins, amyloid fibers, and exopolysaccharides. Flagella are produced by still-dividing rod-shaped Escherichia coli cells during postexponential growth when nutrients become suboptimal. Upon entry into stationary phase, however, cells stop producing flagella, become ...
DOI:
10.1128/mBio.00103-13
PubMed:
23512962
PubMed Central:
PMC3604763

2. Evidence for an autonomous 5' target recognition domain in an Hfq-associated small RNA

Author:
Mika, Franziska,   et al.   ; Papenfort, Kai; Bouvier, Marie; Sharma, Cynthia M.; Vogel, Jörg;     Show all 5 Authors
Source:
Proceedings of the National Academy of Sciences of the United States of America 2010 v.107 no.47 pp. 20435-20440
ISSN:
0027-8424
Subject:
Salmonella; adenosine; animals; homeostasis; messenger RNA; microRNA; outer membrane proteins; regulon; translation (genetics)
Abstract:
... The abundant class of bacterial Hfq-associated small regulatory RNAs (sRNAs) parallels animal microRNAs in their ability to control multiple genes at the posttranscriptional level by short and imperfect base pairing. In contrast to the universal length and seed pairing mechanism of microRNAs, the sRNAs are heterogeneous in size and structure, and how they regulate multiple targets is not well unde ...
DOI:
10.1073/pnas.1009784107
PubMed:
21059903
PubMed Central:
PMC2996696