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Specks U, Mayer U, Nischt R, et al. Structure of recombinant N-terminal globule of type VI collagen alpha 3 chain and its binding to heparin and hyaluronan. EMBO J. 1992;11(12):4281-90
Specks, U., Mayer, U., Nischt, R., Spissinger, T., Mann, K., Timpl, R., Engel, J., & Chu, M. L. (1992). Structure of recombinant N-terminal globule of type VI collagen alpha 3 chain and its binding to heparin and hyaluronan. The EMBO journal, 11(12), 4281-90.
Specks, U, et al. "Structure of recombinant N-terminal globule of type VI collagen alpha 3 chain and its binding to heparin and hyaluronan." The EMBO journal vol. 11,12 (1992): 4281-90.
Specks U, Mayer U, Nischt R, Spissinger T, Mann K, Timpl R, Engel J, Chu ML. Structure of recombinant N-terminal globule of type VI collagen alpha 3 chain and its binding to heparin and hyaluronan. EMBO J. 1992 Dec;11(12):4281-90. PMID: 1425570; PMCID: PMC557001.
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Wiley Free PMC Article

EMBO J. 1992 Dec;11(12):4281-90.

Structure of recombinant N-terminal globule of type VI collagen alpha 3 chain and its binding to heparin and hyaluronan.

The EMBO journal

U Specks, U Mayer, R Nischt, T Spissinger, K Mann, R Timpl, J Engel, M L Chu

Affiliations

  1. Max-Planck-Institut für Biochemie, Martinsried, Germany.

PMID: 1425570 PMCID: PMC557001
Free PMC Article

Abstract

A large portion of the N-terminal globule of human collagen VI was prepared from the culture medium of stably transfected human embryonic kidney cell clones. The recombinant product corresponds to sequence positions 1-1586 of the alpha 3 (VI) chain that consists of eight homologous approximately 200 residue motifs (N9 to N2) being similar to the A domain motif of von Willebrand factor. By ultracentrifugation fragment N9-N2 showed a molecular mass of 180 kDa and an asymmetric shape. Elongated structures that consist of eight small globes (diameter approximately 5 nm) were demonstrated by electron microscopy. The data indicate that each A domain motif represents a separate folding unit which are connected to each other by short protease-sensitive peptide segments. Circular dichroism studies demonstrated about 38% alpha helix, 14% beta sheets and 17% beta turns. Fragment N9-N2 showed binding to heparin which could be abolished by moderate salt concentrations. Heparin binding was assigned to domains N9, N6 and N3 which were obtained after partial proteolysis. Domains N7, N5 and N4 lacked affinity for heparin. In addition, N9-N2 showed strong binding to hyaluronan that required exposure to 6 M urea for full dissociation. Ligand binding studies indicated some affinity of N9-N2 for the triple helical region of collagen VI suggesting a role of the N-terminal globule in the self-assembly of microfibrils. No or only little binding was, however, observed to fibril-forming collagens I and III, several basement membrane proteins and other extracellular proteins. Fragment N9-N2 was also an inactive substrate for cell adhesion.

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