1m3d

Structure of Type IV Collagen NC1 Domains

spinqualitylabelsall models 1m3d, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1m3d is a 12 chain structure with sequence from Bos taurus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: BR, GOL, LU Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Type IV collagen, which is present in all metazoan, exists as a family of six homologous alpha(IV) chains, alpha1-alpha6, in mammals. The six chains assemble into three different triple helical protomers and self-associate as three distinct networks. The network underlies all epithelia as a component of basement membranes, which play important roles in cell adhesion, growth, differentiation, tissue repair and molecular ultrafiltration. The specificity of both protomer and network assembly is governed by amino acid sequences of the C-terminal noncollagenous (NC1) domain of each chain. In this study, the structural basis for protomer and network assembly was investigated by determining the crystal structure of the ubiquitous [(alpha1)(2).alpha2](2) NC1 hexamer of bovine lens capsule basement membrane at 2.0 A resolution. The NC1 monomer folds into a novel tertiary structure. The (alpha1)(2).alpha2 trimer is organized through the unique three-dimensional domain swapping interactions. The differences in the primary sequences of the hypervariable region manifest in different secondary structures, which determine the chain specificity at the monomer-monomer interfaces. The trimer-trimer interface is stabilized by the extensive hydrophobic and hydrophilic interactions without a need for disulfide cross-linking. Crystal structure of NC1 domains. Structural basis for type IV collagen assembly in basement membranes.,Sundaramoorthy M, Meiyappan M, Todd P, Hudson BG J Biol Chem. 2002 Aug 23;277(34):31142-53. Epub 2002 Apr 22. PMID:11970952 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Collagen

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