A physical map of the megaplasmid pHG1, one of three genomic replicons in Ralstonia eutrophaH16
In: FEMS Microbiology Letters, Jg. 201 (2001-07-01), Heft 2, S. 213-219
Online
serialPeriodical
Zugriff:
We have used pulsed field gel electrophoresis and megabase DNA techniques to investigate the basic genomic organization of Ralstonia eutrophaH16, and to construct a physical map of its indigenous megaplasmid pHG1. This Gram‐negative, soil‐dwelling bacterium is a facultative chemolithoautotroph and a denitrifier. In the absence of organic substrates it can grow on H2as its sole energy source and CO2as its sole source of carbon. Under anaerobic conditions it can utilize nitrate as a terminal electron acceptor, whereby dinitrogen is released. Essential genetic determinants of the enzyme systems responsible for these metabolic processes are linked to the 0.44‐Mb conjugative megaplasmid pHG1. Aside from pHG1, the genome of R. eutrophaH16 is comprised of two circular chromosomes measuring 4.1 and 2.9 Mb, adding up to a total genome size of 7.1 Mb. An estimated five copies of rDNA are distributed on the two chromosomes. A macrorestriction map of pHG1 was derived for the endonucleases DraI and XbaI. Hybridization studies showed that genes for anaerobic metabolism are located on all three genomic replicons.
Titel: |
A physical map of the megaplasmid pHG1, one of three genomic replicons in Ralstonia eutrophaH16
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Autor/in / Beteiligte Person: | Schwartz, Edward ; Friedrich, Bärbel |
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Zeitschrift: | FEMS Microbiology Letters, Jg. 201 (2001-07-01), Heft 2, S. 213-219 |
Veröffentlichung: | 2001 |
Medientyp: | serialPeriodical |
ISSN: | 0378-1097 (print) ; 1574-6968 (print) |
DOI: | 10.1111/j.1574-6968.2001.tb10759.x |
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