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BiologyLectures – winter term 2006
1st year of Pharmacy study
Novemebr 30th, 2006
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8th lecture
6. Cytology– organelles, structure, function
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Animal cell
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Plant cell
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Components of “typical” animal cell
lysosome
mitochondrion
peroxisome
Golgiapparatus
endoplasmicreticulum
nuclearenvelope
vesicle
cytosol
plasmamembrane
nucleus
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Cytoskeletonactin microtubule
Intermedialfilaments
Adapted from ECB Fig 1-20
• Network of long and thin protein fibers • Thin fibers contractile machinery • Thick fibers microtubules • movements of chromosomes• Intermedial filaments – mechanical stench of cell
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• Intracellular space
• The biggest compartment of cell
• Viscous water solution (gel) of small and big molecules
• Space for biochemical reaction
Adapted from ECB Fig 1-17
Cytoplasm
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Membrane organelles
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Nucleus
• The high prominent organelle
• Storage of genetic information - DNA
Nucleus envelope
nucles
2 µmAdapted from ECB Fig 1-8
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NucleicacidesDNA
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ChromosomesNucleus of cell storages one or more molecules of DNA organised in structure of chromosomes
Human: – 22 pairs of autosomes
– 1 pair of sex chromosomes
Human karyotyp
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DNAfolding
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Organisation of chromatin
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DNA is wrapped around histone proteins as chromatinOrganisation of chromatin
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Nucleus
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Freeze-fracture/freeze etch technique
Nuclear pores
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Nuclear pores
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Nuclear pores
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Endoplasmatic reticulum is wide prides network system in whole cell space (compartment)
Endoplasmatic reticulum
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Endoplasmatic reticulum
Function
• Production ofmembranes
• Rough ER⇒synthesis ofproteins
NucleusNuclear envelope Endoplasmic reticulum
1 µm
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Endoplasmatic reticulum
• Production ofmembranes
• Metaboĺicprocessesmetabolickédeje
• Metabolism ofdrug
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Endoplazmatické retikulum (ER)
Najrozsiahlejší membránový systém v eukaryotickej bunke
Funkcia: Syntéza ⎯ Uskladnenie ⎯ Transport
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Endoplazmatické retikulum (ER)
Rozdeľujeme ho na drsné (s ribozómami) a hladké (metabolické)
Proteíny, ktoré končia v Golgiho aparáte, endozómoch, lyzozómoch alebo na povrchu plazmatickej membrány majú pôvod v ER
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Endoplazmatické retikulum
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Endoplazmatické retikulum
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Vznik drsného endoplazmatického retikula
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See notes page
Plug keeps the translocator closedwhen it is not beingused for co-translationalinsertion
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Continue to next slide
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Golgiho aparát
Na membranunaviazanévezikuly
Golgiaparát
endoplazmické retikulumObaly jadra
1 µm
• Syntéza a zbalenie molekúl sekretovaných z bunky
• Odposlanie sytetizovanýchproteínov k rôznym celulárnymkompártmentom
• Tvorba vezikúl, ktoré budúsekrétované z bunky
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Golgiho aparát
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Golgiho aparát
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Golgiho aparát
Zbalenie a odposlanieproteínov
Obnova bunečných membrán
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Spôsob sekrécie vezikúl z bunky
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Figure 14-26 ECB - Exocytosis
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Transport vezikúl k špecifickým kompartmentom
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Figure 14-19 ECB - Vesicle budding
Cargo
Sorting receptor
adaptin
Clathrin coat
dynamin
Coated vesicle
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Figure 14-18 ECB - Clathrin-coated pits and vesicles
Electron micrograph showing formation of clathrin-coated vesicle from clathrin-coated pit
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Splynutie (fúzia) vezikúl
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Tvorba a transport vezikúl v (z) bunky
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Lyzozomálnadegradácia
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Lysosomes
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Mitochondrion
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Mitochondrion
10 µm
• In all eukaryotecells
• Double membraneorganelle
• mitochondrial DNA and ribosomes
• Oxidation ofmolecules ⇒ ATP -energy
• aerobicmetabolizmus
Adapted from ECB Figs 1-10,1-11 100 nm
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Mitochondrion
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Mitochondrion / -aMitochondrion
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Metabolic pathways in mitochondrion
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Oxidative phosphorylation–synthesis of ATP
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Structure of F1F0-ATPase
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Nonmembrane organellesCytoskeleton
Ribosomes
Cilia, centriols, flagella
Microvillus
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Cytoskeletonactin microtubule
Intermedialfilaments
Adapted from ECB Fig 1-20
• Network of long and thin protein fibers • Thin fibers contractile machinery • Thick fibers microtubules • movements of chromosomes• Intermedial filaments – mechanical stench of cell
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Microtubules
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rows =
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Nonmembrane organellesCytoskelet
Ribosomes
Cilie, centriols, flagelates
Microvilli
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Ribosomes
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Ribosome
60% rRNA + 40% protein
Traslation & protein synthesis
bound vs free ribosomes
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rRNAsecondary structure
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Ribosome
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Ribosome
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Free and bound ribosome
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Nonmembrane organellesCytoskelet
Ribosomes
Cilie, centriols, flagelates
Microvilli
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Mitoticapparatus
In 9+0 array2 centrioles
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Cilies - microviles
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+
-
rows =
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Flagellar Beating
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Complex of cell flagellate
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Eukaryotic flagelle (9+2 units)
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