Post by skyship on Jan 29, 2014 16:16:44 GMT -5
It all began with yeast~!
was next to be discovered, followed by URNA in the early 1980s. Since then, the discovery of new non-coding RNAs has continued with snoRNAs, Xist, CRISPR and many more.[18] Recent notable additions include riboswitches and miRNA; the discovery of the RNAi mechanism associated with the latter earned Craig C. Mello and Andrew Fire the 2006 Nobel Prize in Physiology or Medicine.[19][/quote]
en.wikipedia.org/wiki/Noncoding_RNA
These Pilot projects determined the variations: Those phenotypes as in HSP104, a molecular evolutionary directed program, that instituted the ENCODE project, it seems.
The ENCODE Pilot Project:
www.ncbi.nlm.nih.gov/pmc/articles/PMC2212820/
Chimeric proteins:
Indeed, by relying on both computational and experimental analysis, we estimate that at least 4%-5% of the tandem gene pairs in the human genome can be eventually transcribed into a single RNA sequence encoding a putative chimeric protein. While the functional significance of most of these chimeric transcripts remains to be determined, we provide strong evidence that this phenomenon does not correspond to mere technical artifacts and that it is a common mechanism with the potential of generating hundreds of additional proteins in the human genome.
www.ncbi.nlm.nih.gov/pubmed/16344564/
RNAs present in environmental samples
en.wikipedia.org/wiki/RNAs_present_in_environmental_samples
History and discovery
Further information: History of molecular biology
Nucleic acids were first discovered in 1868 by Friedrich Miescher[7] and by 1939 RNA had been implicated in protein synthesis.[8] Two decades later, Francis Crick predicted a functional RNA component which mediated translation; he reasoned that RNA is better suited to base-pair with an mRNA transcript than a pure polypeptide.[9]
The cloverleaf structure of Yeast tRNAPhe (inset) and the 3D structure determined by X-ray analysis.
The first non-coding RNA to be characterised was an alanine tRNA found in baker's yeast, its structure was published in 1965.[10] To produce a purified alanine tRNA sample, Robert W. Holley et al. used 140kg of commercial baker's yeast to give just 1g of purified tRNAAla for analysis.[11] The 80 nucleotide tRNA was sequenced by first being digested with Pancreatic ribonuclease (producing fragments ending in Cytosine or Uridine) and then with takadiastase ribonuclease Tl (producing fragments which finished with Guanosine). Chromatography and identification of the 5' and 3' ends then helped arrange the fragments to establish the RNA sequence.[11] Of the three structures originally proposed for this tRNA,[10] the 'cloverleaf' structure was independently proposed in several following publications.[12][13][14][15] The cloverleaf secondary structure was finalised following X-ray crystallography analysis performed by two independent research groups in 1974.[16][17]
Further information: History of molecular biology
Nucleic acids were first discovered in 1868 by Friedrich Miescher[7] and by 1939 RNA had been implicated in protein synthesis.[8] Two decades later, Francis Crick predicted a functional RNA component which mediated translation; he reasoned that RNA is better suited to base-pair with an mRNA transcript than a pure polypeptide.[9]
The cloverleaf structure of Yeast tRNAPhe (inset) and the 3D structure determined by X-ray analysis.
The first non-coding RNA to be characterised was an alanine tRNA found in baker's yeast, its structure was published in 1965.[10] To produce a purified alanine tRNA sample, Robert W. Holley et al. used 140kg of commercial baker's yeast to give just 1g of purified tRNAAla for analysis.[11] The 80 nucleotide tRNA was sequenced by first being digested with Pancreatic ribonuclease (producing fragments ending in Cytosine or Uridine) and then with takadiastase ribonuclease Tl (producing fragments which finished with Guanosine). Chromatography and identification of the 5' and 3' ends then helped arrange the fragments to establish the RNA sequence.[11] Of the three structures originally proposed for this tRNA,[10] the 'cloverleaf' structure was independently proposed in several following publications.[12][13][14][15] The cloverleaf secondary structure was finalised following X-ray crystallography analysis performed by two independent research groups in 1974.[16][17]
Ribosomal RNA
en.wikipedia.org/wiki/Noncoding_RNA
These Pilot projects determined the variations: Those phenotypes as in HSP104, a molecular evolutionary directed program, that instituted the ENCODE project, it seems.
The ENCODE Pilot Project:
www.ncbi.nlm.nih.gov/pmc/articles/PMC2212820/
Chimeric proteins:
Indeed, by relying on both computational and experimental analysis, we estimate that at least 4%-5% of the tandem gene pairs in the human genome can be eventually transcribed into a single RNA sequence encoding a putative chimeric protein. While the functional significance of most of these chimeric transcripts remains to be determined, we provide strong evidence that this phenomenon does not correspond to mere technical artifacts and that it is a common mechanism with the potential of generating hundreds of additional proteins in the human genome.
www.ncbi.nlm.nih.gov/pubmed/16344564/
RNAs present in environmental samples
en.wikipedia.org/wiki/RNAs_present_in_environmental_samples