title: Meiotic crossover patterns: obligatory crossover, interference and homeostasis in a single process.
abstract: During meiosis, crossover recombination is tightly regulated. A spatial patterning phenomenon known as interference ensures that crossovers are well-spaced along the chromosomes. Additionally, every pair of homologs acquires at least one crossover. A third feature, crossover homeostasis, buffers the system such that the number of crossovers remains steady despite decreases or increases in the number of earlier recombinational interactions. Here we summarize recent work from our laboratory supporting the idea that all 3 of these aspects are intrinsic consequences of a single basic process and suggesting that the underlying logic of this process corresponds to that embodied in a particular (beam-film) model.
authors.affiliation: a Department of Molecular and Cellular Biology ; Harvard University ; Cambridge , MA USA.
authors.forename: Shunxin
authors.initials: S
authors.lastname: Wang
authors.forename: Denise
authors.initials: D
authors.lastname: Zickler
authors.forename: Nancy
authors.initials: N
authors.lastname: Kleckner
authors.forename: Liangran
authors.initials: L
authors.lastname: Zhang
mesh_terms: D002875:Chromosomes / Q000235:genetics / Q000378:metabolism; D003434:Crossing Over, Genetic; D006706:Homeostasis; D008540:Meiosis; D008954:Models, Biological
keywords: BF, beam-film; CO, crossover; DDF, designation driving force; DSBs, double-strand breaks; NCO, noncrossover; SC, synaptonemal complex; STUbL, SUMO-targeted ubiquitin ligase; beam-film model; crossover; crossover homeostasis; crossover interference; meiosis; obligatory crossover; recombination