Xanthomonas sRNA
Encyclopedia
In molecular biology, Xanthomonas sRNA are small RNAs
which have been identified in various species of the bacterium Xanthomonas
.
Analysis of the plant pathogen Xanthomonas campestris
pv.
vesicatoria revealed expression of seven cis-encoded antisense RNA
s (asX1-asX7) and 15 intergenic sRNAs (sX1 - sX15). Some of these sRNAs are only found in Xanthomonas, some are also expressed in other bacteria. One of these sRNAs, sX12, contributes to virulence
.
Several sRNAs have also been identified in Xanthomonas campestris pathovar campestris
. One of these sRNAs, sRNA-Xcc1, may be involved in virulence.
Computational analysis predicts 63 sRNAs in Xanthomonas oryzae pathovar oryzae
, expression of 8 of these has been experimentally confirmed. Expression of three of these is Hfq
-dependent.
Bacterial small RNA
Bacterial small RNAs are small non-coding RNA molecules produced by bacteria, they are highly structured and contain several stem-loops...
which have been identified in various species of the bacterium Xanthomonas
Xanthomonas
Xanthomonas is a genus of Proteobacteria, many of which cause plant diseases. Most varieties of Xanthomonas are available from the National Collection of Plant Pathogenic Bacteria in the United Kingdom and other international culture collections such as ICMP in New Zealand, CFBP in France, and...
.
Analysis of the plant pathogen Xanthomonas campestris
Xanthomonas campestris
Xanthomonas campestris is a bacterial species that causes a variety of plant diseases. Available from the NCPPB,and other international Culture collections such as ICMP, ATCC, and LMG in a purified form, it is used in the commercial production of a high-molecular-weight polysaccharide - xanthan...
pv.
Pathovar
A pathovar is a bacterial strain or set of strains with the same or similar characteristics, that is differentiated at infrasubspecific level from other strains of the same species or subspecies on the basis of distinctive pathogenicity to one or more plant hosts.Pathovars are named as a ternary or...
vesicatoria revealed expression of seven cis-encoded antisense RNA
RNA
Ribonucleic acid , or RNA, is one of the three major macromolecules that are essential for all known forms of life....
s (asX1-asX7) and 15 intergenic sRNAs (sX1 - sX15). Some of these sRNAs are only found in Xanthomonas, some are also expressed in other bacteria. One of these sRNAs, sX12, contributes to virulence
Virulence
Virulence is by MeSH definition the degree of pathogenicity within a group or species of parasites as indicated by case fatality rates and/or the ability of the organism to invade the tissues of the host. The pathogenicity of an organism - its ability to cause disease - is determined by its...
.
Several sRNAs have also been identified in Xanthomonas campestris pathovar campestris
Xanthomonas campestris pv. campestris
Black rot, caused by the bacterium Xanthomonas campestris pv. campestris , is considered the most important and most destructive disease of crucifers, infecting all cultivated varieties of brassicas worldwide . This disease was first described by botanist and entomologist Harrison Garman in...
. One of these sRNAs, sRNA-Xcc1, may be involved in virulence.
Computational analysis predicts 63 sRNAs in Xanthomonas oryzae pathovar oryzae
Xanthomonas oryzae pv. oryzae
Xanthomonas oryzae pv. oryzae is a bacterium which causes a serious blight of rice, other grasses and sedges.-Background:The genus Xanthomonas, which mostly comprises phytopathogenic bacteria, is a member of the family Pseudomonadaceae. Among xanthomonads, Xanthomonas oryzae pv...
, expression of 8 of these has been experimentally confirmed. Expression of three of these is Hfq
Hfq protein
The Hfq protein encoded by the hfq gene was discovered in 1968 as an Escherichia. coli host factor that was essential for replication of the bacteriophage Qβ. It is now clear that Hfq is an abundant bacterial RNA binding protein which has many important physiological roles. Usually mediated by...
-dependent.
See also
- Bacterial small RNABacterial small RNABacterial small RNAs are small non-coding RNA molecules produced by bacteria, they are highly structured and contain several stem-loops...
- Mycobacterium tuberculosis sRNAMycobacterium tuberculosis sRNAMycobactierum tuberculosis contains at least nine small RNA families in its genome. The small RNA families were identified through RNomics - the direct analysis of RNA molecules isolated from cultures of Mycobacterium tuberculosis. The sRNAs were characterised through RACE mapping and Northern...
- Escherichia coli sRNAEscherichia coli sRNAEscherichia coli contains a number of small RNAs located in intergenic regions of its genome. The presence of at least 55 of these has been verfied experimentally. 275 potential sRNA-encoding loci were identified computationally using the QRNA program. These loci will include false positives, so...
- Pseudomonas sRNAPseudomonas sRNAPseudomonas sRNA are non-coding RNAs that were predicted by the bioinformatic program SRNApredict2. This program identifies putative sRNAs by searching for co-localization of genetic features commonly associated with sRNA-encoding genes and the expression of the predicted sRNAs was subsequently...
- Bacillus subtilis BSR sRNAsBacillus subtilis BSR sRNAsIn a screen of the Bacillus subtilis genome for genes encoding ncRNAs, Saito et al. focused on 123 intergenic regions over 500 bp in length, the authors analyzed expression from these regions. Seven IGRs termed bsrC, bsrD, bsrE, bsrF, bsrG, bsrH and bsrI expressed RNAs smaller than 380 nt...