title: Isolation of recombinant BMP receptor IA ectodomain and its 2:1 complex with BMP-2.
abstract: Bone morphogenetic protein-2 (BMP-2) is a member of the transforming growth factor beta superfamily which induces bone formation and regeneration, and important steps during early embryonic development. BMP-2 signals via oligomerization of type I and type II serine/threonine kinase receptors. We report here expression of the extracellular domain of the human type IA receptor for BMP-2 (BMPR-IA) in Escherichia coli. This soluble form of BMPR-IA (sBMPR-IA) was purified employing a BMP-2 affinity column. Gel filtration experiments and analysis of gel filtration fractions by polyacrylamide electrophoresis and densitometry reveal that BMP-2 forms a defined 1:2 complex with sBMPR-IA that can be purified and hopefully used for crystallization studies.
authors.affiliation: Physiologische Chemie II, Biozentrum der Universität Würzburg, Am Hubland, D-97074, Würzburg, Germany. kirsch@biozentrum.uni-wuerzburg.de
authors.forename: T
authors.initials: T
authors.lastname: Kirsch
authors.forename: J
authors.initials: J
authors.lastname: Nickel
authors.forename: W
authors.initials: W
authors.lastname: Sebald
mesh_terms: D001665:Binding Sites; D055396:Bone Morphogenetic Protein 2; D052005:Bone Morphogenetic Protein Receptors, Type I; D019485:Bone Morphogenetic Proteins / Q000737:chemistry / Q000378:metabolism*; D002850:Chromatography, Gel; D003001:Cloning, Molecular; D004591:Electrophoresis, Polyacrylamide Gel; D004926:Escherichia coli; D006801:Humans; D007700:Kinetics; D017346:Protein Serine-Threonine Kinases / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism*; D017978:Receptors, Growth Factor / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism*; D011994:Recombinant Proteins / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism; D016212:Transforming Growth Factor beta
chemical_list: C525718:BMP2 protein, human; D055396:Bone Morphogenetic Protein 2; D019485:Bone Morphogenetic Proteins; D017978:Receptors, Growth Factor; D011994:Recombinant Proteins; D016212:Transforming Growth Factor beta; C499469:recombinant human bone morphogenetic protein-2; D017346:Protein Serine-Threonine Kinases; C498211:BMPR1A protein, human; D052005:Bone Morphogenetic Protein Receptors, Type I