non-coding DNA of prokaryotes

[ouzounis at embl-heidelberg.de]

In article <9306022106.AA01204 at calshp.cals.wisc.edu>, jchen at CALSHP.CALS.WISC.EDU writes:
> Hi, netters:
>      Can any body tell me the percentage of non-coding DNA in any 
>  prokaryotic genome?  It seems to me some body posted a similar question
>  before.
> 
>  Thanks
> 
>  J. Chen
>  Food Research Institute
>  University of Wisconsin
>  jchen at calshp.cals.wisc.edu
> 

The analysis by R. D. Blake & S. Earley (1986) J. Biomol. Struct. Dyn. 4(2),
291-307 could be of some help, although dated by now:

from 326,529 bp of E.coli genomic sequences, the following numbers were
observed:

188,574 protein coding sequences    (58%)

 23,291 RNA gene sequences          ( 7%)

114,664 mostly non-coding sequences (35%)
      |
      |
      ---> from those:  45,948 putative promoters (14%)
                        26,563 terminator regions ( 8%)
                         7,867 intragenic regions (>2%)
                        34,286 unassigned regions (11%)

I hope this helps a little.

C A Ouzounis
EMBL
Heidelberg
D-69117 Germany

ouzounis at embl-heidelberg.de