An Introduction to Molecular Biotechnology

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Completely updated in line with the rapid progress made in the field, this new edition of the highly-praised textbook addresses powerful new methods and concepts in biotechnology, such as genome editing, reprogrammed stem cells, and personalized medicine.<br> An introduction to the fundamentals in molecular and cell biology is followed by a description of standard techniques, including purification and analysis of biomolecules, cloning techniques, gene expression systems, genome editing methods, labeling of proteins and in situ-techniques, standard and high resolution microscopy. The third part focuses on key areas in research and application, ranging from functional genomics, proteomics and bioinformatics to drug targeting, recombinant antibodies and systems biology. The final part looks at the biotechnology industry, explaining intellectual property issues, legal frameworks for pharmaceutical products and the interplay between start-up and larger companies. The contents are beautifully illustrated throughout, with hundreds of full color diagrams and photographs.<br> Provides students and professionals in life sciences, pharmacy and biochemistry with everything they need to know about molecular biotechnology.<br>

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An Introduction toMolecular Biotechnology

Fundamentals, Methods and Applications

Edited by MichaelWink

Copyright Editor Michael Wink Universität Heidelberg Institut für - фото 2

Copyright

Editor

Michael Wink

Universität Heidelberg

Institut für Pharmazie und Molekulare

Biotechnologie (IPMB)

Im Neuenheimer Feld 329

69120 Heidelberg

Germany

Cover credits

Shutterstock #287352494 / paulista

All books published by Wiley‐VCHare carefully produced. Nevertheless, authors, editors, and publisher do not warrant the information contained in these books, including this book, to be free of errors. Readers are advised to keep in mind that statements, data, illustrations, procedural details or other items may inadvertently be inaccurate.

Library of Congress Card No.:applied for

British Library Cataloguing‐in‐Publication DataA catalogue record for this book is available from the British Library.

Bibliographic information published by the Deutsche NationalbibliothekThe Deutsche Nationalbibliothek lists this publication in the Deutsche Nationalbibliografie; detailed bibliographic data are available on the Internet at < http://dnb.d-nb.de>.

© 2021 WILEY‐VCH GmbH, Boschstr. 12, 69469 Weinheim, Germany

All rights reserved (including those of translation into other languages). No part of this book may be reproduced in any form – by photoprinting, microfilm, or any other means – nor transmitted or translated into a machine language without written permission from the publishers. Registered names, trademarks, etc. used in this book, even when not specifically marked as such, are not to be considered unprotected by law.

Print ISBN:978‐3‐527‐34414‐7

ePDF ISBN:978‐3‐527‐81286‐8

ePub ISBN:978‐3‐527‐81288‐2

Cover DesignFormgeber, Mannheim, Germany

Part I Fundamentals of Cellular and Molecular Biology

1 The Cell as the Basic Unit of Life

Michael Wink

Heidelberg University, Institute of Pharmacy and Molecular Biotechnology (IPMB), Im Neuenheimer Feld 329, 69120 Heidelberg, Germany

The base unit of life is the cell. Cells constitute the base element of all prokaryotic cells(cells without a cell nucleus, e.g. Bacteriaand Archaea) and eukaryotic cells(or Eukarya) (cells possessing a nucleus, e.g. protozoa, fungi, plants, and animals). Cells are small, membrane‐bound units with a diameter of 1–20 μm and are filled with concentrated aqueous solutions. Cells are not created de novo , but possess the ability to copy themselves, meaning that they emerge from the division of a previous cell. This means that all cells, since the beginning of life (around 4 billion years ago), are connected with each other in a continuous lineage. In 1885, the famous cell biologist Rudolf Virchow conceived the law of omnis cellula e cellula (all cells arise from cells), which is still valid today.

The structure and composition of all cells are very similar due to their shared evolution and phylogeny( Figure 1.1). We see an astonishing constancy in fundamental structures and mechanisms. Owing to this, it is possible to limit the discussion of the general characteristics of a cell to a few basic types ( Figure 1.2):

Bacterial cells

Plant cells

Animal cells

Figure 11 Tree of life phylogeny of life domains Figure 12 Schematic - фото 3

Figure 1.1 Tree of life – phylogeny of life domains.

Figure 12 Schematic structure of prokaryotic and eukaryotic cells a - фото 4

Figure 1.2 Schematic structure of prokaryotic and eukaryotic cells. (a) Bacterial cell, (b) plant mesophyll cell, and (c) animal cell.

Nucleotide sequences from 16S rRNA, amino acid sequences of cytoskeleton proteins, and characteristics of the cell structure were used to reconstruct this phylogenetic tree. Prokaryotes are divided into Bacteriaand Archaea. Archaea form a sister group with eukaryotes; they share important characteristics (Tables 1.1and 1.2). Many monophyletic groups can be recognized within the eukaryotes (diplomonads/trichomonads, Euglenozoa, Alveolata, Stramenopilata [heterokonts], red algae and green algae/plants, fungi and animals; see Tables 6.3–6.5 for details).

Table 1.1 Comparison of important biochemical and molecular characteristics of the three domains of life.

Character Prokaryotes Eukaryotes
Archaea Bacteria
Organization Unicellular Unicellular Unicellular or multicellular
Cytology
Internal membranes Rare Rare Always (Table 1.2)
Compartments Only cytoplasm Only cytoplasm Several (Table 1.2)
Organelles No No Mitochondria; plastids
Ribosomes 70S 70S 80S (mt, cp: 70S)
Membrane lipids Ether lipids Ester lipids, hopanoids Ester lipids, sterols
Cell wall Pseudopeptidoglycan, polysaccharides, glycoproteins Murein (peptidoglycan), polysaccharides, proteins PL: polysaccharides, cellulose F: chitin A: no
Cytoskeleton FtsZ and MreB protein FtsZ and MreB protein Tubulin, actin, intermediary filaments
Cell division Binary fission Binary fission Mitosis
Genetics
Nuclear structure Nucleoid Nucleoid Membrane‐enclosed nucleus with chromosomes
Recombination Similar to conjugation Conjugation Meiosis, syngamy
Chromosome Circular, single Circular, single Linear, several
Introns Rare Rare Frequent
Noncoding DNA Rare Rare Frequent
Operon Yes Yes No
Extrachromosomal DNA plasmids (linear) Plasmids (circular) mtDNA, cpDNA, plasmids in fungi
Transcription/translation Concomitantly Concomitantly Transcription in nucleus, translation in cytoplasm
Promotor structure TATA box −35 and −10 sequences TATA box
RNA polymerases Several (8–12 subunits) 1 (4 subunits) 3 (with 12–14 subunits)
Transcription factors Yes No (sigma factor) Yes
Initiator tRNA Methionyl‐tRNA N ‐Formylmethionyl‐tRNA Methionyl‐tRNA
Cap structure of mRNA polyadenylation No No Yes

PL, plants; F, fungi; A, animals; mt, mitochondria; cp, plastid.

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