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Progress in Education. Volume 53
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mRNA: Molecular Biology, Processing and Function
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Editors: Irma Fernandez and Lynn Jackson
Book Description:
In this collection, the authors review the currently available data on interactions of ribosomal components with canonical mRNAs and with hepatitis C virus (HCV)-like IRESes during translation and on conformational rearrangements in the ribosomes accompanying these interactions. This review considers data obtained by biochemical approaches, primarily by site-directed cross-linking with the application of mRNA and IRES analogues bearing reactive groups in definite locations, and models for translational complexes of higher eukaryotic ribosomes derived from cryo-electron microscopy. Afterwards, the authors discuss how the addition of the poly(A) tail of 30-100 adenosines to the 3´-end of mRNA has been shown to be important for the stability, nuclear export, export of mRNA to the cytoplasm and translation of a transcript. The molecular mechanism responsible for the definition of a poly(A) site includes several recognition, cleavage and polyadenylation factors that identify the poly(A) signal, usually AAUAAA hexamer and similar variants, located 10-35 nucleotides upstream of the cleavage site. The process known as SUMO (small ubiquitin-related modifier) conjugation to a lysine residue in the target protein or sumoylation is a rapid, reversible post-transcriptional modification is also examined. Similar to ubiquitin, SUMO isoforms are conjugated to their targets by a isopeptide bond between their C-terminal glycine and the ɛ-NH2 group of the target lysine residue. Next, the authors discuss splicing of pre-mRNAs coding for proteins. Since the discovery of frequent spliceosomal gene mutations which occur in about 65% of patients with myelodysplastic syndrome (MDS), we know that splicing factor gene mutations are the most frequent mutations found in MDS patients. Predominantly, four splicing factor genes (SF3B1, SRSF2, U2AF1, ZRSR2) are mutated in MDS and related malignancies. In closing, the authors present their findings that splicing is not only necessary for obtaining correct open reading frames, but also leads to deposition of the exon junction complex core. Essentially, all pre-mRNAs are cleaved and polyadenylated with exception of histone mRNAs. (Nova Biomedical)


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Table of Contents:
Preface

Chapter 1. The Interaction of mRNA with Ribosomes in the Course of Translation in Higher Eukaryotes (pp. 1-42)
(Dmitri Graifer and Galina Karpova)

Chapter 2. Formation of the 3´-Ends of Eukaryotic Messenger RNAs – Polyadenylation and Alternative Polyadenylation (pp. 43-68)
(Ota Fuchs)

Chapter 3. Regulatory Roles of Sumoylation in Messenger RNA Processing and Metabolism (pp. 69-96)
(Ota Fuchs)

Chapter 4. Frequent Alterations in Messenger RNA Splicing in Myelodysplastic Syndromes (pp. 97-122)
(Ota Fuchs)

Chapter 5. The Close Coupling of a Nucleocytoplasmic Messenger Ribonucleoproten Particle Export and the Biogenesis of Messenger Ribonucleoprotein Particle
(pp. 123-144)
(Ota Fuchs)

Index (pp. 145)

Total Pages: 152

   Series:
      Cell Biology Research Progress
   Binding: Softcover
   Pub. Date: 2018 - 1st Quarter
   ISBN: 978-1-53613-168-0
   Status: AV
  
Status Code Description
AN Announcing
FM Formatting
PP Page Proofs
FP Final Production
EP Editorial Production
PR At Prepress
AP At Press
AV Available
  
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mRNA: Molecular Biology, Processing and Function