Nuclear envelope and nuclear matrix: interactions and dynamics.
The peripheral nuclear lamina is located near the nuclear inner membrane and consists of lamin filaments and integral membrane proteins, including the lamin B receptor and various isoforms of lamina-associated polypeptides (LAP) 1 and 2. Several nuclear membrane proteins also interact with chromatin proteins BAF and Hp1. Lamins in the nuclear interior associate with at least one soluble (non-membrane-bound) LAP2 isoform named LAP2alpha. The internal lamins, together with Tpr-based filaments that connect to nuclear pore complexes, are proposed to be major structural elements of the internal nuclear matrix. We describe the structural links between the peripheral lamina and the internal nuclear matrix that are thought to be mediated by LAP2 family members, filament protein Tpr and nucleoporin Nup153. These findings are discussed in relation to human diseases that arise from mutations in nuclear lamina proteins.
Vlcek
S
S
Department of Biochemistry and Molecular Cell Biology, Vienna Biocenter, University of Vienna, Austria.
Dechat
T
T
Foisner
R
R
D021581:Active Transport, Cell Nucleus / Q000502:physiology; D000818:Animals; D002453:Cell Cycle / Q000502:physiology; D002843:Chromatin / Q000378:metabolism; D006367:HeLa Cells; D006801:Humans; D034921:Lamin Type B; D034882:Lamins; D008856:Microscopy, Fluorescence; D008954:Models, Biological; D009685:Nuclear Envelope / Q000737:chemistry / Q000378:metabolism*; D015530:Nuclear Matrix / Q000737:chemistry / Q000378:metabolism*; D028861:Nuclear Pore Complex Proteins / Q000378:metabolism; D009687:Nuclear Proteins / Q000378:metabolism; D020033:Protein Isoforms; D011518:Proto-Oncogene Proteins / Q000378:metabolism
D002843:Chromatin; D034921:Lamin Type B; D034882:Lamins; C079377:NUP153 protein, human; D028861:Nuclear Pore Complex Proteins; D009687:Nuclear Proteins; D020033:Protein Isoforms; D011518:Proto-Oncogene Proteins; C073597:TPR protein, human