JCB logo
PeproTech: Cell Culture Supplements
  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents

This Article
Right arrow Full Text
Right arrow Full Text (PDF, 640K)
Right arrow PPT slides of all figures
Right arrow Alert me when this article is cited
Right arrow Citation Map
Services
Right arrow Email this article
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new content in the JCB
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Koch, M.
Right arrow Articles by Champliaud, M.-F.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Koch, M.
Right arrow Articles by Champliaud, M.-F.
Right arrowPubmed/NCBI databases
*Gene*GEO Profiles
*HomoloGene*OMIM
*Protein*UniGene
Social Bookmarking
 Add to CiteULike   Add to Complore   Add to Connotea   Add to Del.icio.us   Add to Digg   Add to Facebook   Add to Reddit   Add to Technorati   Add to Twitter  
What's this?

© The Rockefeller University Press, 0021-9525/1999//605 $5.00
The Journal of Cell Biology, Volume 145, Number 3, , 1999 605-618


Regular Articles

Characterization and Expression of the Laminin {gamma}3 Chain: A Novel, Non-Basement Membrane–associated, Laminin Chain



Manuel Koch*, Pamela F. Olson*, Anne Albus*, William Jin*, Dale D. Hunter{ddagger}, William J. Brunken*, Robert E. Burgeson*, and Marie-France Champliaud*

* The Cutaneous Biology Research Center, Massachusetts General Hospital, and the Department of Dermatology, Harvard Medical School, Charlestown, Massachusetts 02129; and {ddagger} The Departments of Neuroscience, Anatomy and Cell Biology, and Ophthalmology, Tufts University School of Medicine, Boston, Massachusetts 02111

Laminins are heterotrimeric molecules composed of an {alpha}, a β, and a {gamma} chain; they have broad functional roles in development and in stabilizing epithelial structures. Here, we identified a novel laminin, composed of known {alpha} and β chains but containing a novel {gamma} chain, {gamma}3. We have cloned gene encoding this chain, LAMC3, which maps to chromosome 9 at q31-34. Protein and cDNA analyses demonstrate that {gamma}3 contains all the expected domains of a {gamma} chain, including two consensus glycosylation sites and a putative nidogen-binding site. This suggests that {gamma}3-containing laminins are likely to exist in a stable matrix.

Studies of the tissue distribution of {gamma}3 chain show that it is broadly expressed in: skin, heart, lung, and the reproductive tracts. In skin, {gamma}3 protein is seen within the basement membrane of the dermal-epidermal junction at points of nerve penetration. The {gamma}3 chain is also a prominent element of the apical surface of ciliated epithelial cells of: lung, oviduct, epididymis, ductus deferens, and seminiferous tubules. The distribution of {gamma}3-containing laminins on the apical surfaces of a variety of epithelial tissues is novel and suggests that they are not found within ultrastructurally defined basement membranes. It seems likely that these apical laminins are important in the morphogenesis and structural stability of the ciliated processes of these cells.

Key Words: laminin • testis • oviduct • lung • chromosome 9q31-34



Abbreviations used in this paper: FCMD, Fukuyama congenital muscular dystrophy; FISH, fluorescent in situ hybridization; G, globular.

The authors gratefully acknowledge the excellent technical support provided by Ms. Carol Milbury, and the expert assistance of Dr. Yimin Ge with confocal microscopy. The authors also thank Dr. Richard Kammerer for the HisTrx and a pPEP-T vector.

Dr. Brunken is on leave from the Department of Biology, Boston College.



Add to CiteULike CiteULike   Add to Complore Complore   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us   Add to Digg Digg   Add to Facebook Facebook   Add to Reddit Reddit   Add to Technorati Technorati   Add to Twitter Twitter    What's this?


This article has been cited by other articles:



  Home | Help | Feedback | Subscriptions | Archive | Search | Table of Contents