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A more recent version of this article appeared on December 15, 2006
Papers In Press, published online ahead of print November 2, 2006
J. Biol. Chem, 10.1074/jbc.R600025200
Submitted on August 22, 2006
Revised on October 31, 2006
Accepted on November 2, 2006
Molecular recognition in the assembly of collagens: Terminal noncollagenous domains are key recognition modules in the formation of triple-helical protomers
Jamshid Khoshnoodi, Jean-Philippe Cartailler, Keith Alvares, Arthur Veis, and Billy G. Hudson
Dept. of Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232-2372
Corresponding Author: billy.hudson{at}vanderbilt.edu
The a-chains of the collagen superfamily are encoded with information that specifies self-assembly into fibrils, microfibrils and networks that have diverse functions in the extracellular matrix. A key self-organizing step, common to all collagen types, is trimerization that selects, binds and registers cognate a-chains for assembly of triple-helical protomers that subsequently oligomerize into specific suprastructures. In this article, we review recent findings on the mechanism of chain selection and infer that terminal noncollagenous domains function as recognition modules in trimerization, and are therefore key determinants of specificity in the assembly of suprastructures. This mechanism is also illustrated with computer-generated animations.

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Copyright © 2006 by the American Society for Biochemistry and Molecular Biology.
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