Chapter 19

Chapter 19 - C hapter 19 Cell adhesion 4 main functions...

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Chapter 19: Cell adhesion 4 main functions: - Anchoring junctions including both cell-cell adhesions and cell-matrix adhesions transmit stresses and are tethered to CS filaments inside the cell - Occluding junction seal the gaps between cells in epithelia so as to make the sheet impermeable - Channel forming junctions create passageways linking cytoplasms of adjacent cells - Signal relaying junctions allow signals to be relayed from cell t cell across the PM @ target sites Cadherins and cell-cell adhesion - Adheren junctions are anchoprage sites for actin filaments - Desmosomes junctions are anchorage sites for intermediate filaments - TM adhesion proteins span the membrane with one end linking to the CS inside the cell and the other end linking to other structures outside it o Cadherin: mediate attachment cell to cell ( adheren junctions) o Integrin: mediate attachment cell to matrix (desmosomes junctions) Cadherins mediate CA dependent cellcell adhesion in all animals - Removal of CA from the extracellular matrix causes adhesions to come drift
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  • Spring '08
  • REXACH
  • cell cell adhesions, mediate attachment cell, adhesion Adheren junctions, adhesion Cadherin molecules, catenins Adherens junctions

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Chapter 19 - C hapter 19 Cell adhesion 4 main functions...

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