1cfb
CRYSTAL STRUCTURE OF TANDEM TYPE III FIBRONECTIN DOMAINS FROM DROSOPHILA NEUROGLIAN AT 2.0 ANGSTROMS
OverviewOverview
We report the crystal structure of two adjacent fibronectin type III repeats from the Drosophila neural cell adhesion molecule neuroglian. Each domain consists of two antiparallel beta sheets and is folded topologically identically to single fibronectin type III domains from the extracellular matrix proteins tenascin and fibronectin. beta bulges and left-handed polyproline II helices disrupt the regular beta sheet structure of both neuroglian domains. The hydrophobic interdomain interface includes a metal-binding site, presumably involved in stabilizing the relative orientation between domains and predicted by sequence comparision to be present in the vertebrate homolog molecule L1. The neuroglian domains are related by a near perfect 2-fold screw axis along the longest molecular dimension. Using this relationship, a model for arrays of tandem fibronectin type III repeats in neuroglian and other molecules is proposed.
About this StructureAbout this Structure
1CFB is a Single protein structure of sequence from Drosophila melanogaster. Full crystallographic information is available from OCA.
ReferenceReference
Crystal structure of tandem type III fibronectin domains from Drosophila neuroglian at 2.0 A., Huber AH, Wang YM, Bieber AJ, Bjorkman PJ, Neuron. 1994 Apr;12(4):717-31. PMID:7512815 Page seeded by OCA on Fri May 2 12:40:16 2008