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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Clathrin assembly protein AP180: primary structure, domain organization and identification of a clathrin binding site.

Binding of AP180 to clathrin triskelia induces their assembly into 60-70 nm coats. The largest rat brain cDNA clone isolated predicts a molecular weight of 91,430 for AP180. Two cDNA clones have an additional small 57 bp insert. The deduced molecular weight agrees with gel filtration results provided the more chaotropic denaturant 6 M guanidinium thiocyanate is substituted for the weaker guanidinium chloride. The sequence and the proteolytic cleavage pattern suggest a three domain structure. The N-terminal 300 residues (pI 8.7) harbour a clathrin binding site. An acidic middle domain (pI 3.6, 450 residues), interrupted by an uncharged alanine rich segment of 59 residues, appears to be responsible for the anomalous physical properties of AP180. The C-terminal domain (166 residues) has a pI of 10. 4. AP180 mRNA is restricted to neuronal sources. AP180 shows no significant homology to known clathrin binding proteins, but is nearly identical to a mouse phosphoprotein (F1-20). This protein, localized to synaptic termini, has so far been of unknown function.[1]

References

  1. Clathrin assembly protein AP180: primary structure, domain organization and identification of a clathrin binding site. Morris, S.A., Schröder, S., Plessmann, U., Weber, K., Ungewickell, E. EMBO J. (1993) [Pubmed]
 
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