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A spliceosome is a complex of RNA and many protein subunits called snRNP's, that removes the non-coding introns from unprocessed mRNA. Spliceosomes are unique to eukaryotic mRNA as the mRNA of prokaryotes lack introns. The snRNPs that make up the spliceosome are named U1, U2, U4, U5, and U6, and participate in several RNA-RNA and RNA-protein interactions. The RNA part is rich in uridine (the U nucleotides). There are specific 5' and 3' sites on the pre-mRNA that the spliceosome recognises. The nucleotide sequence between these locations is removed, and the two exons are spliced together. In accorda "i wannna fuck girlsssssssssssssss" with the GU-AG rule, all introns have a 5' GU and a 3' AG recognition sequence which the spliceosome recognizes and excises as a lariat whereby the sequence is subsequently destroyed. Ribonucleic acid (RNA) is a nucleic acid polymer consisting of nucleotide monomers. ...
A representation of the 3D structure of myoglobin, showing coloured alpha helices. ...
Diagram of the location of introns and exons within a gene. ...
The interaction of mRNA in a eukaryote cell. ...
Prokaryotes (from Old Greek pro- before + karyon nut or kernel, referring to the cell nucleus, + suffix -otos, pl. ...
Uridine is a molecule (known as a nucleoside) that is formed when uracil is attached to a ribose ring (also known as a ribofuranose) via a β-N1-glycosidic bond. ...
A nucleotide is a chemical compound that consists of a heterocyclic base, a sugar, and one or more phosphate groups. ...
An exon is any region of DNA within a gene, that is transcribed to the final messenger RNA (mRNA) molecule, rather than being spliced out from the transcribed RNA molecule. ...
A group of less abundant snRNPs, U11, U12, U4atac, and U6atac, together with U5, are subunits of the so-called minor spliceosome that splices a rare class of pre-mRNA introns, denoted U12-type. The minor spliceosome is a ribonucleoprotein complex that catalyses the removal of an atypical class of spliceosomal introns (U12-type) from eukaryotic messenger RNAs in plant, insects, vertebrates and some fungi (Rhizopus oryzae). ...
Alternative splicing Alternative splicing (the re-combination of different exons) is a major source of genetic diversity in eukaryotes. Splice variants have been used to account for the relatively small number of genes in the human genome. For years the estimate widely varied with top estimates reaching 100,000 genes[reference required], but now, thanks to the Human Genome Project we know the figure is closer to 30,000 genes. However, almost every human gene is thought to have at least two isoforms[reference required]. Various modes of alternative splicing Alternative splicing is the process that occurs in eukaryotes in which the splicing process of a pre-mRNA transcribed from one gene can lead to different mature mRNA molecules and therefore to different proteins. ...
An exon is any region of DNA within a gene, that is transcribed to the final messenger RNA (mRNA) molecule, rather than being spliced out from the transcribed RNA molecule. ...
Genetic diversity is a characteristic of ecosystems and gene pools that describes an attribute which is commonly held to be advantageous for survival -- that there are many different versions of otherwise similar organisms. ...
In genetics, splicing is a modification of genetic information prior to translation. ...
This stylistic schematic diagram shows a gene in relation to the double helix structure of DNA and to a chromosome (right). ...
The human genome is the genome of Homo sapiens. ...
The examples and perspective in this article or section may not represent a worldwide view. ...
In biology, a protein isoform is a version of a protein with some small differences, usually a splice variant or the product of some posttranslational modification. ...
Spliceome The term spliceome was coined in the early 21st century to describe the set of all possible alternative splices in an organism. It is an analogy to the genome or proteome. The concept and list of alternative splices is useful in bioinformatics and computational biology. It allows modular development of computational technology to deal with the spliceome. In biology the genome of an organism is the whole hereditary information of an organism that is encoded in the DNA (or, for some viruses, RNA). ...
The term proteome was coined by Mark Wilkins in 1995 (1) and is used to describe the entire complement of proteins in a given biological organism or system at a given time, i. ...
Various modes of alternative splicing Alternative splicing is the process that occurs in eukaryotes in which the splicing process of a pre-mRNA transcribed from one gene can lead to different mature mRNA molecules and therefore to different proteins. ...
A spliceosome is a complex of RNA and many protein subunits, that remove the non-coding introns from unprocessed mRNA. The mRNA of prokaryotes is simpler, and they do not have introns, so only eukaryotes have spliceosomes. ...
References - Chapter 12, pp 311 7th ed, Vishal.
- Alberts, Bruce. Bray, Dennis. Hookin, Karen. Johnson, Alexander, Lewis, Julian, Raff, Martin, Roberts, Keith. Walter, Peter. essential cell biology Second edition, GS Garland Science, Taylor & Francis Group, NEW YORK AND LONDON.
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