Basement membrane deposition of nidogen 1 but not nidogen 2 requires the nidogen binding module of the laminin 1 chain

Mokkapati, Sharada, Fleger-Weckmann, Anja, Bechtel, Manuela, Koch, Manuel, Breitkreutz, Dirk, Mayer, Ulrike ORCID:, Smyth, Neil and Nischt, Roswitha (2011) Basement membrane deposition of nidogen 1 but not nidogen 2 requires the nidogen binding module of the laminin 1 chain. Journal of Biological Chemistry, 286 (3). pp. 1911-1918. ISSN 0021-9258

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The nidogen-laminin interaction is proposed to play a key role in basement membrane (BM) assembly. However, though there are similarities, the phenotypes in mice lacking nidogen 1 and 2 (nidogen double null) differ to those of mice lacking the nidogen binding module (γ1III4) of the laminin γ1 chain. This indicates different cell- and tissue-specific functions for nidogens and their interaction with laminin and poses the question of whether the phenotypes in nidogen double null mice are caused by the loss of the laminin-nidogen interaction or rather by other unknown nidogen functions. To investigate this, we analyzed BMs, in particular those in the skin of mice lacking the nidogen binding module. In contrast to nidogen double null mice, all skin BMs in γ1III4-deficient mice appeared normal. Furthermore, although nidogen 1 deposition was strongly reduced, nidogen 2 appeared unchanged. Mice with additional deletion of the laminin γ3 chain, which contains a γ1-like nidogen binding module, showed a further reduction of nidogen 1 in the dermoepidermal BM; however, this again did not affect nidogen 2. This demonstrates that in vivo only nidogen 1 deposition is critically dependent on the nidogen binding modules of the laminin γ1 and γ3 chains, whereas nidogen 2 is independently recruited either by binding to an alternative site on laminin or to other BM proteins.

Item Type: Article
Faculty \ School: Faculty of Science > School of Biological Sciences
UEA Research Groups: Faculty of Medicine and Health Sciences > Research Groups > Gastroenterology and Gut Biology
Depositing User: Users 2731 not found.
Date Deposited: 01 Jun 2011 21:13
Last Modified: 16 Jan 2024 01:20
DOI: 10.1074/jbc.M110.149864

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