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Cell-Cell Signaling.

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Presentation on theme: "Cell-Cell Signaling."— Presentation transcript:

1 Cell-Cell Signaling

2

3 Neurotransmitters

4

5 Ligand-Gated Na+ Channel
Post-synaptic membrane

6 Target Cell

7 Signal Transduction Pathway of Target Cell

8 Receptor Tyrosine Kinase-MAP Kinase Pathway

9 Receptor Tyrosine Kinase (RTK) Activation
(GEF) (RTK)

10 RTKs Bound to Signal Molecule

11 Activation of Ras Protein
Kinase Cascade (GEF)

12 Kinase Cascade (MKKK) (MKK) Target Proteins

13

14 Tumor Progression Pg. 729

15 Colonize New Tissues Pg. 727

16 Tumor Growth Pg. 736

17 Normal Ras and Oncogenic Ras

18 Post-Translational Modfication of Ras
FTase

19 Therapy for “Ras-Positive” Tumors
FTase Inhibitors FTase

20 Pathways Disrupted in Cancer Cells

21 Signal Transduction Pathways and Cell Differentiation
Stem Cell Specialized cell type (neuron, skin cell, red blood cell, etc.)

22 Blood Cell Formation

23 Red Blood Cell Development

24 EPO Synthesis of proteins that stimulate Red Blood Cell development

25 Negative Regulation of JAK/STAT Pathway

26 Seven-Pass Receptors Cell Types Adrenaline Glucogon TSH, LH
Heart muscle Skeletal muscle Thyroid Ovary Kidney Intestinal epithelia Contraction Glycogen breakdown Hormone secretion Water retention Ion transport Pg. 546

27 Activation of Galpha Subunit

28 Synthesis of cyclic AMP
Adenylyl Cyclase ATP cyclic AMP Pg. 550

29 Targets Ion Channels Transcription Factors Enzymes

30 Cholera Toxin G.I. Tract G∂ “ON”

31 Cytoskeletal Structures
Intermediate filaments Actin Microtubules Chapter 17

32 Tubulin Dimer GTP GTP

33

34

35 GFP-Tagged Centrosomes

36 Centrosome Structure

37

38

39 Microtubule “Poisons”
Colchicine Taxol (Autumn crocus) (Pacific Yew)

40 Tubulin Dimer GTP GTP Taxol

41 Microtubules Vesicle Transport Chromosome segregation
(mitotic spindle) Cilia/Flagella

42 Microtubule “Motor” Proteins

43

44 Microtubule “Motor” Proteins

45

46

47 Actin Filaments

48 Actin Monomer

49

50 Arp2/3 (Actin Related Proteins)

51

52 Gelsolin Protein New minus end

53

54 Myosin-II

55 Muscle Cell

56 Sarcomere

57 Contraction of a Sarcomere

58 Resting Muscle

59 Ca2+ Binds Troponin C

60 Tropomyosin blocks access to actin filament

61

62 Muscle Cell

63

64

65 Muscle Relaxants Baclofen Pancuronium
Inhibits Ligand-gated ion channels Ligand for Seven-pass receptor

66 Muscle cell membrane can not be de-polarized
Pancuronium Muscle Cell Muscle cell membrane can not be de-polarized

67 Muscle Relaxants Baclofen Pancuronium
Inhibits Ligand-gated ion channels Ligand for Seven-pass receptor

68 Muscle cell membrane can not be de-polarized
Baclofin Muscle Cell Membrane Muscle Cell Membrane Muscle cell membrane can not be de-polarized

69 Cytokinesis

70 Myosin II - GFP Interphase Telophase Cytokinesis Cytokinesis

71 “Contractile Unit” in Cytokinesis
Plasma Membrane Cytosol Fig

72 Mitotic Cell Cycle DNA Replication

73 G1 S G2 M-Phase G1

74

75 G1 S G2 M-Phase G1

76 Binding site for Origin Recognition Complex (ORC) (ORC)

77 Semi-Conservative DNA Replication
(G1 Phase) (G2 Phase)

78


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