Rna Cleavage Sites
Rna Cleavage Sites - Related Videos
12:24
PAR-CliP - A Method to Identify Transcriptome-wide the Binding Sites of RNA Binding Proteins
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Cited by 267 •
2010
RNA transcripts are subject to extensive posttranscriptional regulation that is mediated by a multitude of trans-acting RNA-binding proteins (RBPs). Here we present a generalizable method to identify precisely and on a transcriptome-wide scale the RNA binding sites of RBPs.
09:16
Analysis of RNA Processing Reactions Using Cell Free Systems: 3' End Cleavage of Pre-mRNA Substrates in vitro
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Cited by 1 •
2014
RNA polymerase II synthesizes a precursor RNA that extends beyond the 3' end of the mature mRNA. The end of the mature RNA is generated cotranscriptionally, at a site dictated by RNA sequences, via the endonuclease activity of the cleavage complex. Here, we detail the method to study cleavage reactions in vitro.
01:33
Cleavage and Blastulation
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2019
After a large-single-celled zygote is produced via fertilization, the process of cleavage occurs while zygotes travel through the uterine tube. Cleavage is a mitotic cell division that does not result in growth. With each round of successive cell division, daughter cells get increasingly smaller. Zygotic Genome Activation At the beginning of embryogenesis, maternal mRNAs control development. However, by the eight-cell stage of cleavage, embryonic genes become activated in a process called...
01:49
Conserved Binding Sites
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2020
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function. Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
07:33
Physical Properties Of Minerals I: Crystals and Cleavage
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2023
Source: Laboratory of Alan Lester - University of Colorado Boulder The physical properties of minerals comprise various measurable and discernible attributes, including color, streak, magnetic properties, hardness, crystal growth form, and crystal cleavage. Each of these properties are mineral-specific, and they are fundamentally related to a particular mineral’s chemical make-up and atomic structure. This experiment examines two properties that stem primarily from symmetric repetition of...
FAQs
Cleavage-site selection reflects the combined effects of nucleotide sequence, RNA structure, and proteins bound to the molecule. These features help determine which phosphodiester bond becomes accessible or favored for cutting. Consequently, the same RNA sequence can be processed differently depending on its structural state or associated proteins, influencing the production and abundance of resulting RNA molecules.
Ribonucleases catalyze RNA cutting as processing or degradation enzymes, whereas some RNAs contain self-cleaving ribozymes that catalyze their own cleavage. Both mechanisms act at defined nucleotide positions through phosphodiester-bond hydrolysis, but the catalytic source differs. This distinction helps researchers interpret whether cleavage depends on an external protein catalyst or on the RNA molecule itself.
The position of a cut determines which RNA segments remain and how the molecule is processed or degraded. A cleavage event can therefore contribute to pre-mRNA maturation, generate small RNAs, or alter transcript turnover. Because these outcomes affect RNA function and abundance, changes in site selection can influence regulated gene expression without changing the entire transcription process.
Mapping identifies the nucleotide positions at which RNA molecules are cut, allowing researchers to connect cleavage patterns with RNA processing, degradation, or regulated expression. In pre-mRNA studies, the results can clarify maturation events; in small-RNA research, they can indicate how shorter products arise. The same strategy also helps investigate processing patterns in viral RNA.
Engineered cleavage sites provide controllable positions at which an RNA molecule can be processed or reduced in abundance. By designing such sites within an expression system, researchers can investigate or regulate RNA behavior as part of biotechnology and synthetic biology experiments. Their value lies in linking a planned RNA sequence feature to a desired change in RNA processing or gene expression.
RNA cleavage sites are relevant across several biological contexts rather than a single pathway. Studies examine their roles in pre-mRNA maturation, small-RNA generation, transcript turnover, and viral RNA processing. Comparing these contexts helps distinguish cleavage used to produce functional RNA products from cleavage associated with RNA removal or with regulated control of RNA abundance.