What question did this study set out to answer?

Identify and characterize the molecular organization and chain composition of type IV collagen networks in smooth muscle basement membranes.

July 1, 2001Journal of Biological ChemistryOpen Access

The NC1 Domain of Collagen IV Encodes a Novel Network Composed of the α1, α2, α5, and α6 Chains in Smooth Muscle Basement Membranes

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Authors

DBDorin‐Bogdan BorzaMeharry Medical College OBOlga BondarMatrix Research (United States)YNYoshifumi NinomiyaOkayama University

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Implication

Biochemical analysis uncovers a novel collagen IV network in smooth muscle basement membranes, highlighting the mechanism of chain loss in X-linked Alport syndrome.

Key Points

Identify and characterize the molecular organization and chain composition of type IV collagen networks in smooth muscle basement membranes.
Solubilized noncollagenous (NC1) hexamers from aorta and bladder smooth muscle basement membranes via collagenase digestion.
Fractionated hexamers using monoclonal antibody affinity chromatography targeting α5 and α6 NC1 domains, followed by two-dimensional gel electrophoresis and Western blotting.
Performed in vitro re-association assays to determine whether NC1 domain sequences independently direct supramolecular network assembly.
Smooth muscle basement membranes contain a novel α1.α2.α5.α6 network linked by NC1–NC1 interactions between distinct protomers, existing alongside the classical α1.α2 network.
Re-association experiments established that recognition sequences within the NC1 domains are fully sufficient to direct the assembly of both the α1.α2 and α1.α2.α5.α6 networks.
Structural identification of this network demonstrates that type IV collagen organizes into three principal assemblies, explaining the paired loss of α5 and α6 chains in X-linked Alport syndrome.

Cite This Study

Borza et al. (2001) studied this question.

synapsesocial.com/papers/6a80ac9604731064ad47402f https://doi.org/10.1074/jbc.m103690200

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Implication

Biochemical analysis uncovers a novel collagen IV network in smooth muscle basement membranes, highlighting the mechanism of chain loss in X-linked Alport syndrome.

The NC1 Domain of Collagen IV Encodes a Novel Network Composed of the α1, α2, α5, and α6 Chains in Smooth Muscle Basement Membranes

Discussion

Member takes

Implication

Key Points

Cite This Study

The NC1 Domain of Collagen IV Encodes a Novel Network Composed of the α1, α2, α5, and α6 Chains in Smooth Muscle Basement Membranes

Discussion

Member takes

Implication

Key Points

Cite This Study

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