Structural characterization of recombinant domain II of the basement membrane proteoglycan perlecan.
Mouse perlecan domain II (325 residues), consisting of four cysteine-rich LA modules, one IG module and a link region, was obtained in purified form from a stably transfected mammalian cell clone. Rotary shadowing electron microscopy demonstrated a globular domain connected to a short rod-like segment of variable length. This suggested that tandem arrays of LA modules form rod-like elements. Folding into a native structure was indicated by the sharing of immunological epitopes with tissue perlecan, a CD spectrum demonstrating 37% beta structure and a limited susceptibility to proteolysis. The domain also showed N-glycosylation of a single acceptor site and 7-8 O-linked oligosaccharides. The latter were located mainly in the link region within proline-rich sequences.
Max-Planck-Institut für Biochemie, Martinsried, Germany.
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M
Costell
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T
Sasaki
K
K
Mann
Y
Y
Yamada
R
R
Timpl
D000595:Amino Acid Sequence; D000818:Animals; D002942:Circular Dichroism; D004591:Electrophoresis, Polyacrylamide Gel; D006031:Glycosylation; D019812:Heparan Sulfate Proteoglycans; D006497:Heparan Sulfate / Q000737:chemistry* / Q000302:isolation & purification; D051379:Mice; D008969:Molecular Sequence Data; D017510:Protein Folding; D017434:Protein Structure, Tertiary; D011509:Proteoglycans / Q000737:chemistry* / Q000302:isolation & purification; D011994:Recombinant Proteins / Q000737:chemistry / Q000302:isolation & purification; D017421:Sequence Analysis
D019812:Heparan Sulfate Proteoglycans; D006497:Heparan Sulfate; D011509:Proteoglycans; D011994:Recombinant Proteins; C071927:perlecan