Search results
Results from the WOW.Com Content Network
The 5S ribosomal RNA (5S rRNA) is an approximately 120 nucleotide-long ribosomal RNA molecule with a mass of 40 kDa.It is a structural and functional component of the large subunit of the ribosome in all domains of life (bacteria, archaea, and eukaryotes), with the exception of mitochondrial ribosomes of fungi and animals.
The DNA for the 5S subunit occurs in tandem arrays (~200–300 true 5S genes and many dispersed pseudogenes), the largest one on the chromosome 1q41-42. 5S rRNA is transcribed by RNA polymerase III. The 18S rRNA in most eukaryotes is in the small ribosomal subunit, and the large subunit contains three rRNA species (the 5S , 5.8S and 28S in ...
A diagram of how mRNA is used to create polypeptide chains. Ribosomal RNA (rRNA) is the catalytic component of the ribosomes. The rRNA is the component of the ribosome that hosts translation. Eukaryotic ribosomes contain four different rRNA molecules: 18S, 5.8S, 28S and 5S rRNA.
Of the two, chloroplastic ribosomes are closer to bacterial ones than mitochondrial ones are. Many pieces of ribosomal RNA in the mitochondria are shortened, and in the case of 5S rRNA, replaced by other structures in animals and fungi. [29] In particular, Leishmania tarentolae has a minimalized set of mitochondrial rRNA. [30]
The 60S subunit contains a 28S rRNA that is homologous to the prokaryotic 23S ribosomal RNA. In addition, it contains a 5.8S rRNA that corresponds to the 5' end of the 23S rRNA, and a short 5S rRNA. Both 18S and 28S have multiple insertions to the core rRNA fold of their prokaryotic counterparts, which are called expansion segments.
rRNA: ribosomal RNA multiple families: 5S rRNA: 5S ribosomal RNA RF00001: 5.8S rRNA: 5.8S ribosomal RNA RF00002: SSU rRNA: small subunit ribosomal RNA CL00111: LSU rRNA: large subunit ribosomal RNA CL00112: NoRC RNA: nucleolar remodeling complex associated RNA RF01518: pRNA promoter RNA RF01518: synonym of NoRC RNA: 6S RNA: 6S RNA RF00013: SsrS ...
RNA polymerase I transcribes most rRNA transcripts (28S, 18S, and 5.8S), but the 5S rRNA subunit (component of the 60S ribosomal subunit) is transcribed by RNA polymerase III. [19] Transcription of rRNA yields a long precursor molecule (45S pre-rRNA), which still contains the internal transcribed spacer (ITS) and external transcribed spacer ...
Ribosomes are the macromolecular machines that are responsible for mRNA translation into proteins. The eukaryotic ribosome, also called the 80S ribosome, is made up of two subunits – the large 60S subunit (which contains the 25S [in plants] or 28S [in mammals], 5.8S, and 5S rRNA and 46 ribosomal proteins) and a small 40S subunit (which contains the 18S rRNA and 33 ribosomal proteins). [6]