EXTRACELLULAR MATRIX ECM
ECM ECM
ECM(extracellular matrix)ECMECMECM
MACROMOLECULAR ORGANIZATION OF ECM
ECM
Collagen(collagen)
19IIIIIIVXI30
Collagen
collagenstructure (tropocollagen)(Gly-x-y)n x(Pro) y(Hypro)(Hylys)- 300nm 1.5nm
Structures of the collagen67nm
TEM image of collagen
;
RERProLys43CVC
(collagen fibril)
Collagen fibrils around a fibroblast??
1890""
FibronectinFNFN VFNECMFN204.59.5FN57
Fibronectin helps connect the inside of the cell to the outside
fibronectin dimer
FN RGD: FN Arg-Gly-Asp
FNFNFNFNECMFNRGDArg-Gly-Asp FNRGDFNFN
laminin(LN)7LN81-31-31-2FN815-2850N-
Laminin Structure
12
50nm200nm
Basal lamina: ; ; (Schwann cells)
()
: LN :
1glycosaminoglycanGAGGAG(HA)GAG10
N-
0
N-
0.2~2.3
N-
1.0~2.0
N-
0.2~3.0
N-
2.0~3.0
N-
0.9~1.8
2 proteoglycanHASerGAGXyl-Gal-Gal-GlcUASerHAGAGHA
A Proteoglycan Complex.Galactose N-Acetyl-D-glucosamineD-glucuronic acid N-Acetyl-D-galactosamine
:
-
--(fiber-network)-
elastin AlaLys
Elastin
1ECManoikis2
3anchorage dependent growth45
:
Cell membranePlasma membraneInternal membraneBiomembraneunit membrane lipid raftcaveolae liposomedetergentghostmembrane associated cytoskeletoncell junctiontight junctionanchoring junctionsdesmosomegap junctioncell adhesion moleculeCAMcell adhensioncadherinintegrin Cell coatglacocalyxextracellular matrixECMbasal membraneglycosaminoglycanGAG
1 2 -------- 3 4 5___________________________________________________________________
1 A B3 C D72 A B C D3 A B C D4 ABCD5 A B C D6L- A B C D7 A B C D
162Gly-x-y3 4 5RGD
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