Signal recognition particle RNA

Further, RNA, 4.5S RNA signal recognition particle known as 7SL RNA, 6S, FFS or is a component of the signal recognition particle (SRP) ribonucleoprotein complex. SRP is a ribonucleoprotein stored universally capable to manage the movement of proteins in cells and to separate them. In the SRP RNA, I contribute to the binding and release of the signal peptide and SRP protein of one or more species. RNA and protein components of this complex is highly conserved, but it is no different in the kingdom among the variety of life. Aluminum SINE family general, derived from the Delete after 7SL RNA gene of coherence in the center perhaps.

And 9 SRPS 72,68,54,19,14: SRP of eukaryotic organisms are composed of six protein and 7S RNA of 300 nucleotides. SRP of Archaea, are composed of cognate RNA and 7S of SRP54 protein and eukaryotic SRP19. RNA 7S of archaea and eukaryotes have a secondary structure very similar. Most bacteria of the SRP is made in (homolog of SRP54 protein eukaryotic) FFH protein and RNA molecules (4.5S). Gram-positive bacteria specific (for example, Bacillus subtilis) has a long eukaryotic organisms such as SRP RNA, including the aluminum domain.

In archaea and eukaryotes, eight times in the S domain and aluminum coil elements are separated by a long linker region. Aluminum domain is thought to mediate the function of the phase difference between the elongation of the peptide chain of the SRP. Spiral that is universal reserved interact with mediated signal sequence recognition the SRP54 M domain. Has been to stabilize the helix 8 of SRP54 When considered SRP19 in helix 6 complex and are involved in SRP assembly. Binding of the human genome, in particular, contain a large amount of related SRP RNA sequence comprising repeating aluminum are known.

The SRP RNA, mouse cancer gene RNA and second birds (ocorna) virus particles were detected. Then, it is a component stable HeLa cells bound polysomes in the uninfected cell membrane fraction SRP RNA was found. In 1980, 11 S “signal recognition protein” to promote the migration of protein secretion across the membrane of the endoplasmic reticulum cell biologists, purified from dog pancreas (abbreviated as “SRP” occasional). That the SRP RNA component is included was discovered it. Comparison of SRP RNA gene revealed the spiral of 8 SRP RNA that is stored in all areas of life from very different species. Region of the 5 ‘and 3’ ends of the closest mammalian SRP RNA were similar central aluminum dominant family of repetitive sequences in the human genome. This is because the aluminum DNA of SRP RNA derived from the reverse transcription and integration of multiple sites of human chromosome follows is a clear resection of SRP RNA-specific (S) fragment of the center. The SRP RNA is, it is found in cell organelles, like some photosynthetic organisms of many plastid SRP.

SRP RNA in eukaryotes, is transcribed from DNA and (III in Pol) RNA polymerase III. Also [edit] RNA polymerase III is, 5S ribosomal RNA, tRNA and transfers the gene of spliceosome U6 RNA and 7SK RNA. Initiators human SRP RNA gene contains elements downstream of the transcription start site. Plant SRP RNA promoter contains a TATA box of the header element and stimulation (USE). [Quote yeast SRP RNA gene is (referred to as B units) and the promoter of the gene in the additional play a role in regulating transcription of SRP of Pol III gene TATA box sequence. In bacteria, genes are organized in an operon and are transcribed by RNA polymerase. The 5 ‘end of small bacteria (4.5S) SRP RNA of many, edge SRP RNA is cleaved by RNase P of RN [edit] Bacillus subtilis was processed by ribonuclease III. So far, the intron of SRP RNA was observed.

It is an integral part of a large area of ​​the SRP and small in the SRP RNA. Transport proteins bound to the SRP ribosome function of the small region is slowing can bind membrane receptors on local SRP (SR). The large area, the SRP of SRP RNA signal peptide mechanism, and promote the hydrolysis guanosine triphosphate two (GTP) molecule. To be able to protein translation continues to enter the Lokon, this reaction frees the SRP from the ribosome and the SRP receptor. Across the joint translation membrane protein (translation in) and into the extracellular space or the cellular compartment to another. In eukaryotes, the objective is a membrane of the endoplasmic reticulum (ER). In Archaea, SRP provides the protein of the plasma membrane. In bacteria, SRP includes a protein of the inner membrane mainly.