複合体: Cytoplasmic Ring Subunit of Xenopus laevis NPC
タンパク質・ペプチド: x 18種
キーワード
building block of vertebrate NPC. / STRUCTURAL PROTEIN
機能・相同性
機能・相同性情報
: / macromolecule localization / nitrogen compound transport / system development / nephron development / GATOR2 complex / macromolecule metabolic process / Seh1-associated complex / nuclear pore inner ring / animal organ development ...: / macromolecule localization / nitrogen compound transport / system development / nephron development / GATOR2 complex / macromolecule metabolic process / Seh1-associated complex / nuclear pore inner ring / animal organ development / protein exit from endoplasmic reticulum / COPII-coated vesicle budding / transcription-dependent tethering of RNA polymerase II gene DNA at nuclear periphery / nuclear pore outer ring / nuclear pore organization / COPII vesicle coat / post-transcriptional tethering of RNA polymerase II gene DNA at nuclear periphery / attachment of mitotic spindle microtubules to kinetochore / structural constituent of nuclear pore / nucleocytoplasmic transport / poly(A)+ mRNA export from nucleus / mitotic metaphase chromosome alignment / positive regulation of TOR signaling / mRNA transport / nuclear pore / mRNA export from nucleus / cellular response to nutrient levels / positive regulation of TORC1 signaling / GTPase activator activity / cellular response to amino acid starvation / chromosome segregation / kinetochore / protein import into nucleus / protein transport / nuclear membrane / lysosomal membrane / cell division / positive regulation of DNA-templated transcription / structural molecule activity / DNA binding / zinc ion binding / cytosol / cytoplasm 類似検索 - 分子機能
National Natural Science Foundation of China (NSFC)
31430020
中国
National Natural Science Foundation of China (NSFC)
31621092
中国
引用
ジャーナル: Cell Res / 年: 2020 タイトル: Structure of the cytoplasmic ring of the Xenopus laevis nuclear pore complex by cryo-electron microscopy single particle analysis. 著者: Gaoxingyu Huang / Yanqing Zhang / Xuechen Zhu / Chao Zeng / Qifan Wang / Qiang Zhou / Qinghua Tao / Minhao Liu / Jianlin Lei / Chuangye Yan / Yigong Shi / 要旨: The nuclear pore complex (NPC) exhibits structural plasticity and has only been characterized at local resolutions of up to 15 Å for the cytoplasmic ring (CR). Here we present a single-particle ...The nuclear pore complex (NPC) exhibits structural plasticity and has only been characterized at local resolutions of up to 15 Å for the cytoplasmic ring (CR). Here we present a single-particle cryo-electron microscopy (cryo-EM) structure of the CR from Xenopus laevis NPC at average resolutions of 5.5-7.9 Å, with local resolutions reaching 4.5 Å. Improved resolutions allow identification and placement of secondary structural elements in the majority of the CR components. The two Y complexes in each CR subunit interact with each other and associate with those from flanking subunits, forming a circular scaffold. Within each CR subunit, the Nup358-containing region wraps around the stems of both Y complexes, likely stabilizing the scaffold. Nup205 connects the short arms of the two Y complexes and associates with the stem of a neighboring Y complex. The Nup214-containing region uses an extended coiled-coil to link Nup85 of the two Y complexes and protrudes into the axial pore of the NPC. These previously uncharacterized structural features reveal insights into NPC assembly.