title: Identification of the NC1 domain of {alpha}3 chain as critical for {alpha}3{alpha}4{alpha}5 type IV collagen network assembly.
abstract: The network organization of type IV collagen consisting of α3, α4, and α5 chains in the glomerular basement membrane (GBM) is speculated to involve interactions of the triple helical and NC1 domain of individual α-chains, but in vivo evidence is lacking. To specifically address the contribution of the NC1 domain in the GBM collagen network organization, we generated a mouse with specific loss of α3NC1 domain while keeping the triple helical α3 chain intact by connecting it to the human α5NC1 domain. The absence of α3NC1 domain leads to the complete loss of the α4 chain. The α3 collagenous domain is incapable of incorporating the α5 chain, resulting in the impaired organization of the α3α4α5 chain-containing network. Although the α5 chain can assemble with the α1, α2, and α6 chains, such assembly is incapable of functionally replacing the α3α4α5 protomer. This novel approach to explore the assembly type IV collagen in vivo offers novel insights in the specific role of the NC1 domain in the assembly and function of GBM during health and disease.
authors.affiliation: Division of Matrix Biology, Beth Israel Deaconess Medical Center and Harvard Medical School,Boston, Massachusetts 02115, USA.
authors.forename: Valerie
authors.initials: V
authors.lastname: LeBleu
authors.forename: Malin
authors.initials: M
authors.lastname: Sund
authors.forename: Hikaru
authors.initials: H
authors.lastname: Sugimoto
authors.forename: Gabriel
authors.initials: G
authors.lastname: Birrane
authors.forename: Keizo
authors.initials: K
authors.lastname: Kanasaki
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Finan
authors.forename: Caroline A
authors.initials: CA
authors.lastname: Miller
authors.forename: Vincent H
authors.initials: VH
authors.lastname: Gattone
authors.forename: Heather
authors.initials: H
authors.lastname: McLaughlin
authors.forename: Charles F
authors.initials: CF
authors.lastname: Shield
authors.forename: Raghu
authors.initials: R
authors.lastname: Kalluri
mesh_terms: D000418:Albumins / Q000378:metabolism; D000595:Amino Acid Sequence; D000818:Animals; D003094:Collagen / Q000737:chemistry*; D024141:Collagen Type IV / Q000737:chemistry*; D003401:Creatine / Q000652:urine; D004195:Disease Models, Animal; D005109:Extracellular Matrix / Q000378:metabolism; D005838:Genotype; D006801:Humans; D007668:Kidney / Q000378:metabolism; D051379:Mice; D008822:Mice, Transgenic; D008969:Molecular Sequence Data; D009394:Nephritis, Hereditary / Q000235:genetics; D011401:Promoter Regions, Genetic; D017434:Protein Structure, Tertiary; D017386:Sequence Homology, Amino Acid
chemical_list: D000418:Albumins; D024141:Collagen Type IV; D003094:Collagen; D003401:Creatine