NDLI: Pyrococcus furiosus flagella: biochemical and transcriptional analyses identify the newly detected flaB0 gene to encode the major flagellin

Content Provider	PubMed Central
Author	Näther-schindler, Daniela J. Schopf, Simone Bellack, Annett Rachel, Reinhard Wirth, Reinhard
Copyright Year	2014
Abstract	We have described previously that the flagella of the Euryarchaeon Pyrococcus furiosus are multifunctional cell appendages used for swimming, adhesion to surfaces and formation of cell-cell connections. Here, we characterize these organelles with respect to their biochemistry and transcription. Flagella were purified by shearing from cells followed by CsCl-gradient centrifugation and were found to consist mainly of a ca. 30 kDa glycoprotein. Polymerization studies of denatured flagella resulted in an ATP-independent formation of flagella-like filaments. The N-terminal sequence of the main flagellin was determined by Edman degradation, but none of the genes in the complete genome code for a protein with that N-terminus. Therefore, we resequenced the respective region of the genome, thereby discovering that the published genome sequence is not correct. A total of 771 bp are missing in the data base, resulting in the correction of the previously unusual N-terminal sequence of flagellin FlaB1 and in the identification of a third flagellin. To keep in line with the earlier nomenclature we call this flaB0. Very interestingly, the previously not identified flaB0 codes for the major flagellin. Transcriptional analyses of the revised flagellar operon identified various different cotranscripts encoding only a single protein in case of FlaB0 and FlaJ or up to five proteins (FlaB0-FlaD). Analysing the RNA of cells from different growth phases, we found that the length and number of detected cotranscript increased over time suggesting that the flagellar operon is transcribed mostly in late exponential and stationary growth phase.
Related Links	http://dx.doi.org/10.3389/fmicb.2014.00695
Starting Page	695
File Format	PDF
ISSN	1664302X
e-ISSN	1664302X
Journal	Frontiers in Microbiology
Volume Number	5
Language	English
Publisher	Frontiers Media S.A.
Publisher Date	2014-12-01
Access Restriction	Open
Rights Holder	Frontiers Media S.A.
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Microbiology Microbiology (medical)

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