title: Review: perinucleolar structures.
abstract: Several perinucleolar structures have been described in recent years. This review primarily summarizes recent studies regarding two of these structures, the perinucleolar compartment (PNC) and the Sam68 nuclear body (SNB). A number of studies have explored their ultrastructure and molecular components. Despite their different nuclear localizations, PNCs and SNBs share some common characteristics. They both are enriched with RNA binding proteins and nucleic acids and are predominantly localized to the periphery of the nucleolus. They are observed mostly in transformed cells, although prevalence differs among different cell types and cell lines. Their structural integrity is influenced by the transcriptional state of the cell. However, the functions of both the PNC and the SNB remain unknown. In addition to the PNC and SNB, a perinucleolar structure immunolabeled with an antibody to hnRNP L will be discussed.
authors.affiliation: Department of Cell and Molecular Biology, Northwestern University Medical School, 303 E. Chicago Avenue, Chicago, Illinois, 60611, USA.
authors.forename: S
authors.initials: S
authors.lastname: Huang
mesh_terms: D048868:Adaptor Proteins, Signal Transducing; D000818:Animals; D002466:Cell Nucleolus / Q000378:metabolism / Q000648:ultrastructure*; D002467:Cell Nucleus / Q000378:metabolism / Q000648:ultrastructure*; D004268:DNA-Binding Proteins; D006801:Humans; D007091:Image Processing, Computer-Assisted; D015388:Organelles / Q000648:ultrastructure; D012313:RNA / Q000378:metabolism; D016601:RNA-Binding Proteins / Q000032:analysis; D019061:src-Family Kinases / Q000032:analysis
chemical_list: D048868:Adaptor Proteins, Signal Transducing; D004268:DNA-Binding Proteins; C489559:KHDRBS1 protein, human; D016601:RNA-Binding Proteins; D012313:RNA; D019061:src-Family Kinases