Structural Studies of Human Basement-membrane Collagen with the Use of a Monoclonal Antibody
Overview
Affiliations
A monoclonal antibody monospecific for human type IV collagen was used as a structural probe to examine aspects of the macromolecular organization of basement-membrane collagen. Electron-microscopic observation of rotary-shadowed antigen-antibody complexes demonstrated a unique binding site for the antibody 55 +/- 6 nm distant from the 7S cross-linking region of tetrameric type IV collagen. This observation allowed a series of studies that showed: (1) the localization of an intramolecular disulphide bridge within the helical domain of the molecule, (2) the alignment of major peptic-digest fragments of the alpha 1 (IV) chain, and (3) confirmation of the postulated antiparallel arrangement of individual molecules within type IV collagen tetramers.
Type VII collagen forms an extended network of anchoring fibrils.
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PMID: 3818794 PMC: 2114566. DOI: 10.1083/jcb.104.3.611.
Type VII collagen is a major structural component of anchoring fibrils.
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PMID: 3771648 PMC: 2114342. DOI: 10.1083/jcb.103.4.1577.
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