Biology Reference
In-Depth Information
Figure 3.5
Stricture of a TBDT. See the colour plate.
siderophores, haeme, vitamin B12 and several other organic and inor-
ganic compounds (
Noinaj, Guillier, Barnard, & Buchanan, 2010
;
Schauer,
Rodionov, & de Reuse, 2008
).
According to bioinformatic genome analyses, various genes coding for
putative TonB-dependant receptors can be found in several cyanobacterial
classes and species ranging from 1 to 33 transporters present in one organ-
ism (
Mirus, Strauss, Nicolaisen, von Haeseler, & Schleiff, 2009
). It was sug-
gested that the number of TBDTs is dependant on the ecological niche in
which the organism thrives (
Hopkinson & Morel, 2009
;
Mirus et al., 2009
;
Stevanovic, Hahn, Nicolaisen, Mirus, & Schleiff, 2012
).
In the genome of
Anabaena
sp. PCC 7120, 22 different genes code for
putative TBDTs can be identified by bioinformatical means. Not all of these
