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TRANSCRIPTION. TRANSLATION.
23. 11. 2017
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OUTLINE
• CELL NUCLEUS AND DNA
• CENTRAL DOGMA
• I. TRANSCRIPTION• PROCESS – KEY PLAYERS
• REGULATION
• POST-TRANSCRIPTIONAL REGULATION
• II. TRANSLATION• PROCESS – KEY PLAYERS
• REGULATION
• COMPARISION OF EUKARYOTIC VS. PROKARYOTIC CELLS
BREAK
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ÉS MOSTTARTSUNK SZÜNETET!Count Imre Festetics
Hungarian noble landowner and geneticist.
1764- 1847
THE FIRST MAN WHO USED THE TERM “GENETICS” IN A SCIENCE PAPER
Festetics formulated a number of rules of heredity and was the first to refer to these as ‘‘genetic laws of nature”
He used the term genetic for the first time, 80 years before William Bateson
Festetics was the first to recognize empirically the segregation of characters in the second hybrid generation (Mendel’s II. law)
Die genetische Gesätze der Natur. Oekonomische Neuigkeiten und Verhandlungen, 1819.
Publications:
Festetics I (1815a) Híradás a juhtenyésztés jobbítását és pallérozásátóhajtó hazafiakhoz. Nemzeti Gazda 10: 145–147
Festetics I (1820) Bericht des Herrn Grafen Emerich Festetics als Representanten des Schafzüchter-Vereins in Esenburgeer Comitat. Oekon Neuigk Vehandl 25–28
Festetics I (1819b) Weitere Erklärung des Herren Grafen Emmerich von Festetics. Oekon Neuigk Vehandl 169–70
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BIG PICTURE – GENE EXPRESSION
(10th edition) Textbook (9th edition)Gene expression p 282-288 Transcription p 288-293Translation p 293-297
DNA structure
p 270 - 277 p 277 – 282p 282 - 288
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THE CENTRAL DOGMA
• Flow of the genetic information in a cell
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OVERVIEW OF GENE EXPRESSION
Solomon et al – Biology 9th/10th edition
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I. TRANSCRIPTION IN EUKARYOTIC CELL
• First stage in the flow of information from the DNA to polypeptide
DNA RNA
TRANSCRIPTIONmRNA
tRNA
rRNA
miRNA
snoRNA
NU
CLE
US
CY
TOP
LASM
snRNA
siRNA
maturation
maturation
piRNA lncRNA
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I. TRANSCRIPTION (1)
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I. TRANSCRIPTION (2)
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I. TRANSCRIPTION (2)
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I. TRANSCRIPTION (3)
Solomon et al – Biology 9th/10th edition
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TRANSCRIPTION FACTORS
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POSTTRANSCRIPTIONAL MODIFICATIONS
Solomon et al – Biology 9th/10th edition
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BREAKTIME!
LET’S HAVEA BREAK!
WE WILLCONTINUE IN 20 MINUTES
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OVERVIEW OF GENE EXPRESSION
Solomon et al – Biology 9th/10th edition
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THE GENETIC CODE
Solomon et al – Biology 9th/10th edition
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TRANSLATION (1)
Solomon et al – Biology 9th/10th edition
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RIBOSOME
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TRANSLATION (2)
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TRANSLATION (3)
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EUKARYOTIC VS. BACTERIAL CELL
mRNA half-life10 hours 2 minutes
1 mRNA encode >1 polypeptide1 mRNA encode 1 polypeptide
Posttranscriptional regulation
Translation begins beforethe 3’ end of the transcriptis completed
Translation speed(360 aa)1 minute 18 seconds
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SUMMARY
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TRANSCRIPTION VS. TRANSLATION
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THANK YOU FOR YOUR ATTENTION!
“For your own, work with tireless efforts if you want to
understand what are the rules imposed by nature to itself.”
Imre Festetics