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A Closer Look at Polyadenylation
Engelsk Paperback
SPAR
kr 254
A Closer Look at Polyadenylation
Engelsk Paperback
In response to various environmental cues and cellular stress, cells need to modify their protein expression pattern for proper cell functioning. The cell experiences diverse cellular stress as oxidative, genotoxic, and etc. The damage of the genome by certain chemicals or agents affects the cell integrity and leads to genotoxic stress. As such, this compilation discusses how different cellular stresses affect the polyadenylation process and modulate the polyadenylation machinery. Cytoplasmic polyadenylation plays an important role in oocyte maturation, mitotic cell cycle progression, cellular senescence and synaptic plasticity. Poly(A) tails can be elongated post-transcriptionally by noncanonical poly(A) polymerases, which can impact cells with limited transcriptional activity. A recent study is discussed wherein it is shown that that alternative cleavage and polyadenylation isoform expression influences about 10% of targeting by miRNAs between any two cell types analysed and, more importantly, that the accuracy of target prediction can be improved if the cellular alternative cleavage and polyadenylation profile is considered. The authors go on to focus on how altering the polyadenylation process and components of RNA polyadenylation machinery leads to abnormal physiological conditions. The targeting of elements of RNA polyadenylation machinery as therapeutics in clinical research is also discussed. The majority of eukaryotic mRNAs are polyadenylated at their 3'end. This poly(A) tail is not encoded by DNA and is added co-transcriptionally. Cleavage and polyadenylation specific factor (CPSF1) is part of multiple subunit factors required for a site-specific cleavage, which is involved in determining specificity and efficency of the 3' end processing of pre-mRNAs in the nucleus by recognizing the polyadenylation signal. Following this, mutations in the poly(A) signal (AAUAAA hexamer) present in the globin pre-mRNA were identified in hematological disorders caused by defects in the synthesis of one or more of the globin chains (thalassemia). The point mutation AATAAA to AACAAA of a human I(2)-globin gene detected in 1985 in DNA from a patient with I(2)-thalassemia led to the formation of an elongated I(2)-globin mRNA isoform. This compilation addresses how RNA processing at the pre-mRNA level occurs in the cell nucleus and regulates gene expression. Newly synthesized mRNA contains a poly(A) tail, which is added through canonical polyadenylation coupled to transcription. Canonical mRNA 3' processing involves endonucleolytic cleavage within the pre-mRNA sequences and the addition of a poly(A) tail to the upstream cleavage fragment. The closing chapter discusses how the poly(A) tail at the 3'end of the majority of eukaryotic messenger RNAs (mRNAs), with the exception of histone transcripts, is not simply a static entity but more likely a dynamic matter. Its length added to an mRNA is regulated by the concerted action of poly(A) polymerases and deadenylases.
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In response to various environmental cues and cellular stress, cells need to modify their protein expression pattern for proper cell functioning. The cell experiences diverse cellular stress as oxidative, genotoxic, and etc. The damage of the genome by certain chemicals or agents affects the cell integrity and leads to genotoxic stress. As such, this compilation discusses how different cellular stresses affect the polyadenylation process and modulate the polyadenylation machinery. Cytoplasmic polyadenylation plays an important role in oocyte maturation, mitotic cell cycle progression, cellular senescence and synaptic plasticity. Poly(A) tails can be elongated post-transcriptionally by noncanonical poly(A) polymerases, which can impact cells with limited transcriptional activity. A recent study is discussed wherein it is shown that that alternative cleavage and polyadenylation isoform expression influences about 10% of targeting by miRNAs between any two cell types analysed and, more importantly, that the accuracy of target prediction can be improved if the cellular alternative cleavage and polyadenylation profile is considered. The authors go on to focus on how altering the polyadenylation process and components of RNA polyadenylation machinery leads to abnormal physiological conditions. The targeting of elements of RNA polyadenylation machinery as therapeutics in clinical research is also discussed. The majority of eukaryotic mRNAs are polyadenylated at their 3'end. This poly(A) tail is not encoded by DNA and is added co-transcriptionally. Cleavage and polyadenylation specific factor (CPSF1) is part of multiple subunit factors required for a site-specific cleavage, which is involved in determining specificity and efficency of the 3' end processing of pre-mRNAs in the nucleus by recognizing the polyadenylation signal. Following this, mutations in the poly(A) signal (AAUAAA hexamer) present in the globin pre-mRNA were identified in hematological disorders caused by defects in the synthesis of one or more of the globin chains (thalassemia). The point mutation AATAAA to AACAAA of a human I(2)-globin gene detected in 1985 in DNA from a patient with I(2)-thalassemia led to the formation of an elongated I(2)-globin mRNA isoform. This compilation addresses how RNA processing at the pre-mRNA level occurs in the cell nucleus and regulates gene expression. Newly synthesized mRNA contains a poly(A) tail, which is added through canonical polyadenylation coupled to transcription. Canonical mRNA 3' processing involves endonucleolytic cleavage within the pre-mRNA sequences and the addition of a poly(A) tail to the upstream cleavage fragment. The closing chapter discusses how the poly(A) tail at the 3'end of the majority of eukaryotic messenger RNAs (mRNAs), with the exception of histone transcripts, is not simply a static entity but more likely a dynamic matter. Its length added to an mRNA is regulated by the concerted action of poly(A) polymerases and deadenylases.
Se mere i:
Produktdetaljer
Sprog: Engelsk
Sider: 213
ISBN-13: 9781536153552
Indbinding: Paperback
Udgave:
ISBN-10: 1536153559
Kategori: Biokemi
Udg. Dato: 5 apr 2019
Længde: 0mm
Bredde: 0mm
Højde: 0mm
Oplagsdato: 5 apr 2019
Forfatter(e):
Forfatter(e)


Kategori Biokemi


Sprog Engelsk


Indbinding Paperback


Sider 213


Udgave


Længde 0mm


Bredde 0mm


Højde 0mm


Udg. Dato 5 apr 2019


Oplagsdato 5 apr 2019

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