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*  Exon
... the UTRs may contain introns. Some non-coding RNA transcripts also have exons and introns. Mature mRNAs originating from the ... An exon is any part of a gene that will encode a part of the final mature RNA produced by that gene after introns have been ... In RNA splicing, introns are removed and exons are covalently joined to one another as part of generating the mature messenger ... For instance, in the human genome only 1.1% of the genome is spanned by exons, whereas 24% is in introns, with 75% of the ...
*  Small nuclear RNA
The two types of introns mainly differ in their splicing sites: U2-type introns have GT-AG 5' and 3' splice sites while U12- ... These reactions will produce a free lariat intron and ligate two exons to form a mature mRNA. There are two separate classes of ... Splicing, or the removal of introns, is a major aspect of post-transcriptional modification, and takes place only in the ... The major class, which is far more abundant in eukaryotic cells, splices primarily U2-type introns. The initial step of ...
*  Exon shuffling
Two theories arose: the "introns early" theory and the "introns late" theory. Supporters of the "introns early theory" believed ... Introns can interrupt the reading frame of a gene by inserting a sequence between two consecutive codons (phase 0 introns), ... What is clear now is that the eukaryotic exon-intron structure is not static, introns are continually inserted and removed from ... However, prokaryotes eliminated their introns in order to obtain a higher efficiency, while eukaryotes retained the introns and ...
*  Splice site mutation
Introns are supposed to be removed, while the exons are expressed. The mutation must occur at the specific site at which intron ... An intron is separated from its exon by means of the splice site. Acceptor-site and donor-site relating to the splice sites ... In one particular study, a G to C substitution in the splice site of intron 2 produces a skipping effect in the messenger RNA ... The deletion of the splicing site results in one or more introns remaining in mature mRNA and may lead to the production of ...
*  Introns (album)
Introns is a remix album by the American rock band LCD Soundsystem, released in March 2006 through DFA as a digital download. ...
*  Intron
... and possibly to spliceosomal introns. Nuclear pre-mRNA introns (spliceosomal introns) are characterized by specific intron ... Intron transfer has been hypothesized to result in intron gain when a paralog or pseudogene gains an intron and then transfers ... This intron-containing mRNA is then reverse transcribed and the resulting intron-containing cDNA may then cause intron gain via ... In intron transposition, the most commonly purported intron gain mechanism, a spliced intron is thought to reverse splice into ...
*  Database for bacterial group II introns
The Database for Bacterial Group II Introns is a repository of full-length, non-redundant group II introns present in bacterial ... group II intron Candales, Manuel A; Duong Adrian; Hood Keyar S; Li Tony; Neufeld Ryan A E; Sun Runda; McNeil Bonnie A; Wu Li; ... The database is first established in 2002 with roughly 40 introns. In less than 10 years, the database has expanded to 400 ... In addition, it contains a list of intron insertion sites, DNA sequences, protein-encoding sequences, as well as RNA secondary ...
*  Intron-mediated enhancement
If the intron can no longer enhance expression, then inclusion of the intron in the transcript is important, and the intron ... is the ability of an intron sequence to enhance the expression of a gene containing that intron. In particular, the intron must ... The position of an intron within the transcript is also important - the closer an intron is to the start (5' end) of a ... Rose, Alan B. (2004-12-01). "The effect of intron location on intron-mediated enhancement of gene expression in Arabidopsis". ...
*  Group II intron
Intron Splice site Nuclear introns Group I intron Group III intron Twintron LtrA Seetharaman, M; Eldho, NV; Padgett, RA; Dayie ... and long-range intron-intron and intron-exon interactions are important for splice site positioning. Group II introns are ... Group II introns also form very complicated RNA Tertiary Structure. Group II introns possess only a very few conserved ... A subset of group II introns also encode essential splicing proteins in intronic ORFs. The length of these introns can, ...
*  U12 intron database
... (U12DB) is a biological database of containing the sequence of eukaryotic introns that are spliced out by a ... These U12-dependent introns are under-represented in genome annotations because they often have non canonical splice sites. ... Release 1 of the database contains 6,397 known and predicted U12-dependent introns across 20 species. Alioto, Tyler S (Jan 2007 ... "U12DB: a database of orthologous U12-type spliceosomal introns". Nucleic Acids Res. England. 35 (Database issue): D110-5. doi: ...
*  Group III intron
... is a class of introns found in mRNA genes of chloroplasts in euglenid protists. They have a conventional group ... Group III introns are much shorter than other self-splicing intron classes, ranging from 95 to 110 nucleotides amongst those ... In 1994, discovery of a group III intron with a length of one order of magnitude longer indicated that length alone is not the ... In 1989, David A.Christopher and Richard B.Hallick proposed the title, Group III introns to identify this new class with the ...
*  TRNA-intron endonuclease
tRNA-intron lyase (EC 4.6.1.16, tRNA intron endonuclease, transfer ribonucleate intron endoribonuclease, tRNA splicing ... TRNA-intron endonuclease at the US National Library of Medicine Medical Subject Headings (MeSH) Molecular and Cellular Biology ... Thompson, L.D.; Brandon, L.D.; Nieuwlandt, D.T.; Daniels, C.J. (1989). "Transfer RNA intron processing in the halophilic ... Its systematic name is pretRNA lyase (intron-removing; cyclic-2',3'-phosphate-forming). Attardi, D.G.; Margarit, I.; Tocchini- ...
*  Hac1 Xbp1 intron
The Hac1 Xbp1 intron is a non-canonical intron, spliced from bZIP-containing genes called HAC1 in Fungi and XBP1 in Metazoa. ... The consensus intron is very short (20, 23 or 26 nt). However, 14 yeast species have a long (>100 nt) intron in HAC1. In ... Recognition of the intron splice sites is mediated by a base-paired secondary structure of the mRNA that forms at the exon/ ... intron boundaries. Splicing of the Hac1/Xbp1 intron is a key regulatory step in the unfolded protein response (UPR). The Ire- ...
*  Exon-intron database
the Exon-Intron Database (EID) is a database of spliced mRNA sequences Alternative splicing Exon Intron Saxonov, S; Daizadeh I ... Fedorov A; Gilbert W (Jan 2000). "EID: the Exon-Intron Database-an exhaustive database of protein-coding intron-containing ...
*  Small t intron
The small T intron is an intron that is used in some plasmid vectors in order to induce gene expression in mammalian cells. The ... Hunt AG, Mogen BD, Chu NM, Chua NH (1991). "The SV40 small t intron is accurately and efficiently spliced in tobacco cells". ... Huang MT, Gorman CM (1990). "The simian virus 40 small-t intron, present in many common expression vectors, leads to aberrant ... function of this intron in the vectors is unknown, but it is theorized that it might be involved in splicing or translation ...
*  Group I catalytic intron
Intron Group I Intron Sequence and Structure Database Splice site Nuclear introns Group II intron Group III intron Twintron ... Both intron-early and intron-late theories have found evidences in explaining the origin of group I introns. Some group I ... Group I introns often have long open reading frames inserted in loop regions. Splicing of group I introns is processed by two ... A small number of group I introns are also found to encode a class of proteins called maturases that facilitate the intron ...
*  Chloroplast DNA
Notches indicate introns. Chloroplast DNAs are circular, and are typically 120,000-170,000 base pairs long. They can have a ... Interestingly, introns are common in chloroplast DNA molecules, while they are rare in prokaryotic DNA molecules (plant ... mitochondrial DNAs commonly have introns, but not human mtDNA). Among land plants, the contents of the chloroplast genome are ...
*  Chloroplast
Notches indicate introns. With few exceptions, most chloroplasts have their entire chloroplast genome combined into a single ... Interestingly though, unlike prokaryotic DNA molecules, chloroplast DNA molecules contain introns (plant mitochondrial DNAs do ...
*  MCM6
... contains 18 introns. There are 2 non overlapping alternative last exons. The transcripts appear to differ by truncation of ... MCM6 produces, by alternative splicing, 3 different transcripts, all with introns, putatively encoding 3 different protein ... located in two of the MCM6 introns, approximately 14 kb (-13910) and 22 kb (-22018) upstream of LCT. The (-13910) region, in ...
*  IFNAR1
Bürglin TR, Barnes TM (1992). "Introns in sequence tags". Nature. 357 (6377): 367-8. doi:10.1038/357367a0. PMID 1350660. ...
*  UNC-5
When testing the effect of unc-5::intron::unc-5 transgene on a mislocalization defect in UNC-5 mutant animals at 25 °C a ...
*  Nod factor
The NFR5 gene lacks introns. Nod gene expression is induced by the presence of certain flavonoids in the soil, which are ...
*  FAM69C
provided by RefSeq, Nov 2011]. ##Evidence-Data-START## RNAseq introns :: single sample supports all introns ERS025082, ...
*  MOCS3
This gene contains no introns. A pseudogene of this gene is present on chromosome 14. GRCh38: Ensembl release 89: ...
*  Homing endonuclease
"A group II intron RNA is a catalytic component of a DNA endonuclease involved in intron mobility". Cell. 83 (4): 529-38. doi: ... July 2001). "Intertwined structure of the DNA-binding domain of intron endonuclease I-TevI with its substrate". EMBO J. 20 (14 ... Open reading frames encoding homing endonucleases have been found in introns, inteins, and in freestanding form between genes, ... Lambowitz AM, Belfort M (1993). "Introns as mobile genetic elements". Annu Rev Biochem. 62: 587-622. doi:10.1146/annurev.bi. ...