title: The kinetics of V-J joining throughout 3.5 megabases of the mouse Ig kappa locus fit a constrained diffusion model of nuclear organization.
abstract: To gain insight into the nuclear organization of the mouse Ig kappa locus and how it may relate to the formation of synapses during recombination, we have studied the kinetics of rearrangement of different V kappa gene families to J kappa gene segments in the pre-B cell line, 103bcl2. Remarkably, V kappa gene families separated by more than 3.5 Mb from J kappa gene segments rearranged with nearly identical kinetics to those as close as 18 kb to J kappa gene segments. These results fit a model of nuclear organization in which the entire V kappa J kappa region resides within a single nuclear subcompartment and is capable of exhibiting multiple reversible contacts through diffusion and Brownian motion.
authors.affiliation: Department of Molecular Biology, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9148, USA.
authors.forename: Shuyu
authors.initials: S
authors.lastname: Li
authors.forename: William T
authors.initials: WT
authors.lastname: Garrard
mesh_terms: D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology; D002460:Cell Line; D002467:Cell Nucleus / Q000235:genetics; D004058:Diffusion; D015328:Gene Rearrangement, B-Lymphocyte, Light Chain; D007133:Immunoglobulin Joining Region / Q000235:genetics*; D007135:Immunoglobulin Variable Region / Q000235:genetics*; D007145:Immunoglobulin kappa-Chains / Q000235:genetics*; D007700:Kinetics; D051379:Mice; D008957:Models, Genetic; D013234:Stem Cells / Q000276:immunology
chemical_list: D007133:Immunoglobulin Joining Region; D007135:Immunoglobulin Variable Region; D007145:Immunoglobulin kappa-Chains