Heliobacillus mobilis

In the BChl g containing heliobacteria Heliobacillus mobilis and Heliobacterium chlorum symmetric dimers for the primary donor radical cation PgJ5 have been found based on EPR and ENDOR data.85 This symmetric dimer is consistent with the homodimeric structure of the RC. The same reason was invoked to explain the high symmetry of the donor radical-cation Pgg5 in green sulfur bacteria, which is made up from a BChl a dimer.86 For a review see reference 87. Note that these RCs belong to the type I RCs. 

JT Trost and RE Blankenship (1989) Isolation of a photoactive photosynthetic reaction center-core antenna complex from Heliobacillus mobilis. Biochemistry 28 9898-9904... 

Both PsaA and PsaB are highly hydrophobic. Hydropathy plots of the polypeptides obtained by Miihlenhoff, Haehnel, Witt and Herrmann for PsaA of Synechococcus suggest the presence of 11 membrane-spanning helices in each polypeptide, as shown in Fig. 5 (B). The corresponding model ofthe protein is shown in Fig. 5 (C). Of course, as expected, PsaA from cyanobateria is remarkably similar to the corresponding PsaA from eukaryotic PS-I reaction centers. It is of interest to note that Liebl, Mockensturm-Wilson, Frost, Brune, Blankenship and Vermaas found that the two major transmembrane proteins from the photosynthetic bacterium Heliobacillus mobilis are very similar to PsaA and PsaB from eukaryotic PS I and also contain 11 transmembrane helices. 

U LiebI, M Mockensturm-Wilson, JT Trost, DC Brune, RE Blankenship and W Vermass (1993) Single core polypeptide in the reaction center of the photosynthetic bacterium Heliobacillus mobilis Structural implications and relations to other photosystems. Proc Nat Acad Sci, USA 90 7124-7128... 

Fig. 5. Spectra recorded with a dual diode array detecting system in a continuum experiment. Membranes of the heliobacterium Heliobacillus mobilis were excited at 590 nm with a repetition rate of 540 Hz (full width at half-maximum 200 fsec). Spectra were taken at the indicated times after excitation. The authors conclude that this early time spectral evolution is probably due to the excitation distribution among different spectral forms. [With permission from S. Lin, H.-C. Chiou, and R. E. Blankenship, in Research in Photosynthesis, Volume 1 (N. Murata, ed.), p. 417. Kluwer Academic Press, Dordrecht, The Netherlands, 1992.]...

The heliobacteria are a seperate group of photosynthetic bacteria which contain bacteriochloro-phyll g as their major pigment (1). Only three species have been isolated so far Heliobacterium chlorum. Heliobacillus mobilis and Heliospirilum gestii. 

Previously, all work reported on the Heliobacteriaceae has utilized whole cells or isolated membranes from //. chlorum (3-7). Heliobacillus mobilis, the second isolate from this family,... 

Bacteria Heliobacillus mobilis crtN genomic AF080002... 

---