C0465 RNA

Last updated
C0465 RNA

RF00116.jpg

Identifiers
Symbol C0465
Rfam RF00116
Other data
RNA type Gene; sRNA
Domain(s) Bacteria
SO 0000655

The C0465 RNA is a bacterial non-coding RNA of 78 nucleotides in length that is found between the tar and cheW genes in the genomes of Escherichia coli and Shigella flexneri . This ncRNA was originally identified in E.coli using high-density oligonucleotide probe arrays (microarray). [1] The function of this ncRNA is unknown.

Non-coding RNA class of RNA

A non-coding RNA (ncRNA) is an RNA molecule that is not translated into a protein. The DNA sequence from which a functional non-coding RNA is transcribed is often called an RNA gene. Abundant and functionally important types of non-coding RNAs include transfer RNAs (tRNAs) and ribosomal RNAs (rRNAs), as well as small RNAs such as microRNAs, siRNAs, piRNAs, snoRNAs, snRNAs, exRNAs, scaRNAs and the long ncRNAs such as Xist and HOTAIR.

Gene basic physical and functional unit of heredity

In biology, a gene is a sequence of nucleotides in DNA or RNA that codes for a molecule that has a function. During gene expression, the DNA is first copied into RNA. The RNA can be directly functional or be the intermediate template for a protein that performs a function. The transmission of genes to an organism's offspring is the basis of the inheritance of phenotypic trait. These genes make up different DNA sequences called genotypes. Genotypes along with environmental and developmental factors determine what the phenotypes will be. Most biological traits are under the influence of polygenes as well as gene–environment interactions. Some genetic traits are instantly visible, such as eye color or number of limbs, and some are not, such as blood type, risk for specific diseases, or the thousands of basic biochemical processes that constitute life.

<i>Escherichia coli</i> species of Gram-negative, rod-shaped bacterium

Escherichia coli, also known as E. coli, is a Gram-negative, facultative anaerobic, rod-shaped, coliform bacterium of the genus Escherichia that is commonly found in the lower intestine of warm-blooded organisms (endotherms). Most E. coli strains are harmless, but some serotypes can cause serious food poisoning in their hosts, and are occasionally responsible for product recalls due to food contamination. The harmless strains are part of the normal microbiota of the gut, and can benefit their hosts by producing vitamin K2, and preventing colonization of the intestine with pathogenic bacteria, having a symbiotic relationship. E. coli is expelled into the environment within fecal matter. The bacterium grows massively in fresh fecal matter under aerobic conditions for 3 days, but its numbers decline slowly afterwards.

Contents

See also

Related Research Articles

Oligonucleotides are short DNA or RNA molecules, oligomers, that have a wide range of applications in genetic testing, research, and forensics. Commonly made in the laboratory by solid-phase chemical synthesis, these small bits of nucleic acids can be manufactured as single-stranded molecules with any user-specified sequence, and so are vital for artificial gene synthesis, polymerase chain reaction (PCR), DNA sequencing, library construction and as molecular probes. In nature, oligonucleotides are usually found as small RNA molecules that function in the regulation of gene expression, or are degradation intermediates derived from the breakdown of larger nucleic acid molecules.

DNA microarray

A DNA microarray is a collection of microscopic DNA spots attached to a solid surface. Scientists use DNA microarrays to measure the expression levels of large numbers of genes simultaneously or to genotype multiple regions of a genome. Each DNA spot contains picomoles of a specific DNA sequence, known as probes. These can be a short section of a gene or other DNA element that are used to hybridize a cDNA or cRNA sample under high-stringency conditions. Probe-target hybridization is usually detected and quantified by detection of fluorophore-, silver-, or chemiluminescence-labeled targets to determine relative abundance of nucleic acid sequences in the target. The original nucleic acid arrays were macro arrays approximately 9 cm × 12 cm and the first computerized image based analysis was published in 1981. It was invented by Patrick O. Brown.

<i>trp</i> operon Operon that codes for the components for production of tryptophan

The trp operon is an operon—a group of genes that is used, or transcribed, together—that codes for the components for production of tryptophan. The trp operon is present in many bacteria, but was first characterized in Escherichia coli. The operon is regulated so that when tryptophan is present in the environment, the genes for tryptophan synthesis are not expressed. It was an important experimental system for learning about gene regulation, and is commonly used to teach gene regulation.

Biotechnology in pharmaceutical manufacturing

Modern pharmaceutical manufacturing techniques frequently rely upon biotechnology.

C0299 RNA

The C0299 RNA family consists of a group of Shigella flexneri and Escherichia coli RNA genes which are 78 bases in length and are found between the hlyE and umuD genes. The function of this RNA is unknown.

C0343 RNA

The C0343 RNA is a bacterial non-coding RNA of 74 nucleotides in length that is found between the ydaN and dbpA genes in the genomes of Escherichia coli and Shigella flexneri, Salmonella enterica and Salmonella typhimurium. This ncRNA was originally identified in E.coli using high-density oligonucleotide probe arrays (microarray). The function of this ncRNA is unknown.

C0719 RNA

The C0719 RNA is a bacterial non-coding RNA of 222 nucleotides in length that is found between the yghK and glcB genes in the genomes of Escherichia coli and Shigella flexneri. This non-coding RNA was originally identified in E.coli using high-density oligonucleotide probe arrays (microarray.) The function of this ncRNA is unknown.

GadY

GadY RNA is a non-coding RNA. The GadY gene is located on between and on the opposite strand to the GadX and GadW genes. GadY can form base pairs with the 3' UTR of its target mRNA gadX, this pairing is thought to confer increased stability to the transcript, allowing accumulation of gadX and therefore increased expression of downstream acid resistance genes. The GadY gene produces three overlapping transcripts that differ in length. The long form is 105 nucleotides in length and two processed versions are 59 and 90 nucleotides in length. It has been shown that all three forms of GadY bind to the Hfq protein.

IS102 RNA

The IS102 RNA is a non-coding RNA that is found in bacteria such as Shigella flexneri and Escherichia coli. The RNA is 208 nucleotides in length and found between the yeeP and flu genes. This RNA was identified in a computational screen of E. coli. The function of this RNA is unknown.

IS128 RNA

The IS128 RNA is a non-coding RNA found in bacteria such as Escherichia coli and Shigella flexneri. The RNA is 209 nucleotides in length. It is found between the sseA and sseB genes. The IS128 RNA was initially identified in a computational screen of the E. coli genome. The function of this RNA is unknown.

Sib RNA

Sib RNA refers to a group of related non-coding RNA. They were originally named QUAD RNA after they were discovered as four repeat elements in Escherichia coli intergenic regions. The family was later renamed Sib when it was discovered that the number of repeats is variable in other species and in other E. coli strains.

SraB RNA

The SraB RNA is a small non-coding RNA discovered in E. coli during a large scale experimental screen. The 14 novel RNAs discovered were named 'sra' for small RNA, examples include SraC, SraD and SraG. This ncRNA was found to be expressed only in stationary phase. The exact function of this RNA is unknown but it has been shown to affect survival of Salmonella enterica to antibiotic administration in egg albumin. The authors suggest this may be due to SraB regulating a response to components in albumin.

SraG RNA

SraG is a small non-coding RNA (ncRNA). It is the functional product of a gene which is not translated into protein.

GlmZ RNA

GlmZ is a small non-coding RNA (ncRNA). It is the functional product of a gene which is not translated into protein.

T44 RNA

The T44 RNA family consists of a number of bacterial RNA genes of between 135 and 170 bases in length. The t44 gene has been identified in several species of enteric bacteria but homologs have also been identified in Pseudomonas and Coxiella species. The t44 gene is found between the map and rpsB genes in all species in the full alignment apart from Shigella flexneri. The function of this RNA is unknown.

Cell-free protein array technology produces protein microarrays by performing in vitro synthesis of the target proteins from their DNA templates. This method of synthesizing protein microarrays overcomes the many obstacles and challenges faced by traditional methods of protein array production that have prevented widespread adoption of protein microarrays in proteomics. Protein arrays made from this technology can be used for testing protein–protein interactions, as well as protein interactions with other cellular molecules such as DNA and lipids. Other applications include enzymatic inhibition assays and screenings of antibody specificity.

MAGIChip

MAGIChips, also known as "microarrays of gel-immobilized compounds on a chip" or "three-dimensional DNA microarrays", are devices for molecular hybridization produced by immobilizing oligonucleotides, DNA, enzymes, antibodies, and other compounds on a photopolymerized micromatrix of polyacrylamide gel pads of 100x100x20µm or smaller size. This technology is used for analysis of nucleic acid hybridization, specific binding of DNA, and low-molecular weight compounds with proteins, and protein-protein interactions.

FnrS RNA

FnrS RNA is a family of Hfq-binding small RNA whose expression is upregulated in response to anaerobic conditions. It is named FnrS because its expression is strongly dependent on fumarate and nitrate reductase regulator (FNR), a direct oxygen availability sensor.

<i>Escherichia coli</i> sRNA

Escherichia coli contains a number of small RNAs located in intergenic regions of its genome. The presence of at least 55 of these has been verified experimentally. 275 potential sRNA-encoding loci were identified computationally using the QRNA program. These loci will include false positives, so the number of sRNA genes in E. coli is likely to be less than 275. A computational screen based on promoter sequences recognised by the sigma factor sigma 70 and on Rho-independent terminators predicted 24 putative sRNA genes, 14 of these were verified experimentally by northern blotting. The experimentally verified sRNAs included the well characterised sRNAs RprA and RyhB. Many of the sRNAs identified in this screen, including RprA, RyhB, SraB and SraL, are only expressed in the stationary phase of bacterial cell growth. A screen for sRNA genes based on homology to Salmonella and Klebsiella identified 59 candidate sRNA genes. From this set of candidate genes, microarray analysis and northern blotting confirmed the existence of 17 previously undescribed sRNAs, many of which bind to the chaperone protein Hfq and regulate the translation of RpoS. UptR sRNA transcribed from the uptR gene is implicated in suppressing extracytoplasmic toxicity by reducing the amount of membrane-bound toxic hybrid protein.

References

  1. Tjaden B, Saxena RM, Stolyar S, Haynor DR, Kolker E, Rosenow C (2002). "Transcriptome analysis of Escherichia coli using high-density oligonucleotide probe arrays". Nucleic Acids Res. 30 (17): 3732–8. doi:10.1093/nar/gkf505. PMC   137427 Lock-green.svg. PMID   12202758.