U11/U12 snRNP / U2 snRNP binding / U7 snRNA binding / histone pre-mRNA DCP binding / U7 snRNP / histone pre-mRNA 3'end processing complex / SLBP independent Processing of Histone Pre-mRNAs / SLBP Dependent Processing of Replication-Dependent Histone Pre-mRNAs / B-WICH complex / protein methylation ...U11/U12 snRNP / U2 snRNP binding / U7 snRNA binding / histone pre-mRNA DCP binding / U7 snRNP / histone pre-mRNA 3'end processing complex / SLBP independent Processing of Histone Pre-mRNAs / SLBP Dependent Processing of Replication-Dependent Histone Pre-mRNAs / B-WICH complex / protein methylation / 7-methylguanosine cap hypermethylation / poly-ADP-D-ribose modification-dependent protein binding / U12-type spliceosomal complex / U1 snRNP binding / methylosome / pICln-Sm protein complex / RNA splicing, via transesterification reactions / small nuclear ribonucleoprotein complex / SMN-Sm protein complex / spliceosomal tri-snRNP complex / blastocyst formation / protein localization to site of double-strand break / splicing factor binding / P granule / snRNP binding / commitment complex / U2-type precatalytic spliceosome / mRNA cis splicing, via spliceosome / telomerase holoenzyme complex / telomerase RNA binding / U2-type catalytic step 2 spliceosome / U2-type prespliceosome assembly / U2-type spliceosomal complex / chromatin-protein adaptor activity / U1 snRNP / SAGA complex / RNA Polymerase II Transcription Termination / U2 snRNP / U4 snRNP / U2-type prespliceosome / positive regulation of transcription by RNA polymerase III / precatalytic spliceosome / mRNA 3'-splice site recognition / regulation of RNA splicing / mRNA Splicing - Minor Pathway / positive regulation of transcription by RNA polymerase I / spliceosomal complex assembly / U5 snRNP / spliceosomal snRNP assembly / U2 snRNA binding / regulation of DNA repair / Cajal body / U1 snRNA binding / U4/U6 x U5 tri-snRNP complex / catalytic step 2 spliceosome / mRNA Splicing - Major Pathway / Gene and protein expression by JAK-STAT signaling after Interleukin-12 stimulation / RNA splicing / stem cell differentiation / spliceosomal complex / mRNA splicing, via spliceosome / positive regulation of neuron projection development / negative regulation of protein catabolic process / double-strand break repair via homologous recombination / B-WICH complex positively regulates rRNA expression / fibrillar center / nuclear matrix / mRNA processing / cytoplasmic ribonucleoprotein granule / site of double-strand break / snRNP Assembly / spermatogenesis / SARS-CoV-2 modulates host translation machinery / RNA helicase activity / nuclear speck / nuclear body / RNA helicase / chromatin remodeling / mRNA binding / positive regulation of DNA-templated transcription / protein-containing complex binding / nucleolus / enzyme binding / ATP hydrolysis activity / positive regulation of transcription by RNA polymerase II / DNA binding / RNA binding / extracellular exosome / zinc ion binding / nucleoplasm / ATP binding / nucleus / cytoplasm / cytosol 類似検索 - 分子機能
TatSF1-like, RNA recognition motif 1 / TatSF1-like / : / KH-domain / SF3B6, RNA recognition motif / SF3B4, RNA recognition motif 2 / Splicing factor SF3a60 binding domain / Splicing factor SF3a60 binding domain / Cactus-binding C-terminus of cactin protein / Splicing factor 3A subunit 1, ubiquitin domain ...TatSF1-like, RNA recognition motif 1 / TatSF1-like / : / KH-domain / SF3B6, RNA recognition motif / SF3B4, RNA recognition motif 2 / Splicing factor SF3a60 binding domain / Splicing factor SF3a60 binding domain / Cactus-binding C-terminus of cactin protein / Splicing factor 3A subunit 1, ubiquitin domain / U2 small nuclear ribonucleoprotein B'', RNA recognition motif 2 / U2 small nuclear ribonucleoprotein B'', RNA recognition motif 1 / : / Replication stress response SDE2 C-terminal / SF3A2 domain / : / Pre-mRNA-splicing factor SF3a complex subunit 2 (Prp11) / Splicing factor SF3a60 /Prp9 subunit, C-terminal / SF3A3 domain / SF3a60/Prp9 C-terminal / Pre-mRNA-splicing factor SF3A3, of SF3a complex, Prp9 / SF3B4, RNA recognition motif 1 / : / Splicing factor 3A subunit 1, conserved domain / Splicing factor 3A subunit 1 / Pre-mRNA splicing factor PRP21 like protein / : / : / Domain of unknown function DUF382 / Domain of unknown function (DUF382) / SWAP/Surp / SWAP/Surp superfamily / Surp module / SURP motif repeat profile. / Suppressor-of-White-APricot splicing regulator / Splicing factor 3B, subunit 5 / Splicing factor 3B subunit 1 / Splicing factor 3B subunit 1 / Zinc-finger of C2H2 type / PSP, proline-rich / PSP / proline-rich domain in spliceosome associated proteins / Matrin/U1-C, C2H2-type zinc finger / Zinc finger matrin-type profile. / PHF5-like / PHF5-like protein / : / Splicing factor 3B subunit 5/RDS3 complex subunit 10 / Splicing factor 3B subunit 10 (SF3b10) / Splicing factor 3B subunit 1-like / Small ribonucleoprotein associated, SmB/SmN / U2 small nuclear ribonucleoprotein A' / Small nuclear ribonucleoprotein D1 / U2A'/phosphoprotein 32 family A, C-terminal / occurring C-terminal to leucine-rich repeats / Leucine-rich repeat / : / PPP2R1A-like HEAT repeat / SAP motif profile. / SAP domain / Putative DNA-binding (bihelical) motif predicted to be involved in chromosomal organisation / SAP domain / Small nuclear ribonucleoprotein Sm D2 / Small nuclear ribonucleoprotein Sm D3 / Small nuclear ribonucleoprotein E / Small nuclear ribonucleoprotein G / Small nuclear ribonucleoprotein F / Matrin/U1-C-like, C2H2-type zinc finger / U1-like zinc finger / Sm-like protein Lsm7/SmG / Like-Sm (LSM) domain containing protein, LSm4/SmD1/SmD3 / Sm-like protein Lsm6/SmF / LSM domain / LSM domain, eukaryotic/archaea-type / snRNP Sm proteins / DEAD-box subfamily ATP-dependent helicases signature. / ATP-dependent RNA helicase DEAD-box, conserved site / RNA helicase, DEAD-box type, Q motif / : / Sm domain profile. / DEAD-box RNA helicase Q motif profile. / : / RSE1/DDB1/CPSF1 second beta-propeller / Cleavage/polyadenylation specificity factor, A subunit, C-terminal / Cleavage/polyadenylation specificity factor, A subunit, N-terminal / : / CPSF A subunit region / RSE1/DDB1/CPSF1 first beta-propeller / LSM domain superfamily / Leucine-rich repeat profile. / Zinc finger C2H2 superfamily / DEAD/DEAH box helicase domain / DEAD/DEAH box helicase / Zinc finger C2H2-type / Leucine-rich repeat / RNA recognition motif / RNA recognition motif / Eukaryotic RNA Recognition Motif (RRM) profile. / RNA recognition motif domain / RNA-binding domain superfamily 類似検索 - ドメイン・相同性
17S U2 SnRNP complex component HTATSF1 / Splicing factor 3B subunit 1 / U2 small nuclear ribonucleoprotein B'' / U2 small nuclear ribonucleoprotein A' / Small nuclear ribonucleoprotein-associated proteins B and B' / Small nuclear ribonucleoprotein E / Small nuclear ribonucleoprotein F / Small nuclear ribonucleoprotein G / Small nuclear ribonucleoprotein Sm D1 / Small nuclear ribonucleoprotein Sm D2 ...17S U2 SnRNP complex component HTATSF1 / Splicing factor 3B subunit 1 / U2 small nuclear ribonucleoprotein B'' / U2 small nuclear ribonucleoprotein A' / Small nuclear ribonucleoprotein-associated proteins B and B' / Small nuclear ribonucleoprotein E / Small nuclear ribonucleoprotein F / Small nuclear ribonucleoprotein G / Small nuclear ribonucleoprotein Sm D1 / Small nuclear ribonucleoprotein Sm D2 / Small nuclear ribonucleoprotein Sm D3 / Splicing factor 3A subunit 3 / Splicing factor 3B subunit 2 / Splicing factor 3B subunit 3 / Splicing factor 3B subunit 4 / Splicing factor 3A subunit 2 / Splicing factor 3A subunit 1 / Probable ATP-dependent RNA helicase DDX46 / PHD finger-like domain-containing protein 5A / Splicing factor 3B subunit 5 / Splicing factor 3B subunit 6 類似検索 - 構成要素
ジャーナル: Nature / 年: 2020 タイトル: Molecular architecture of the human 17S U2 snRNP. 著者: Zhenwei Zhang / Cindy L Will / Karl Bertram / Olexandr Dybkov / Klaus Hartmuth / Dmitry E Agafonov / Romina Hofele / Henning Urlaub / Berthold Kastner / Reinhard Lührmann / Holger Stark / 要旨: The U2 small nuclear ribonucleoprotein (snRNP) has an essential role in the selection of the precursor mRNA branch-site adenosine, the nucleophile for the first step of splicing. Stable addition of ...The U2 small nuclear ribonucleoprotein (snRNP) has an essential role in the selection of the precursor mRNA branch-site adenosine, the nucleophile for the first step of splicing. Stable addition of U2 during early spliceosome formation requires the DEAD-box ATPase PRP5. Yeast U2 small nuclear RNA (snRNA) nucleotides that form base pairs with the branch site are initially sequestered in a branchpoint-interacting stem-loop (BSL), but whether the human U2 snRNA folds in a similar manner is unknown. The U2 SF3B1 protein, a common mutational target in haematopoietic cancers, contains a HEAT domain (SF3B1) with an open conformation in isolated SF3b, but a closed conformation in spliceosomes, which is required for stable interaction between U2 and the branch site. Here we report a 3D cryo-electron microscopy structure of the human 17S U2 snRNP at a core resolution of 4.1 Å and combine it with protein crosslinking data to determine the molecular architecture of this snRNP. Our structure reveals that SF3B1 interacts with PRP5 and TAT-SF1, and maintains its open conformation in U2 snRNP, and that U2 snRNA forms a BSL that is sandwiched between PRP5, TAT-SF1 and SF3B1. Thus, substantial remodelling of the BSL and displacement of BSL-interacting proteins must occur to allow formation of the U2-branch-site helix. Our studies provide a structural explanation of why TAT-SF1 must be displaced before the stable addition of U2 to the spliceosome, and identify RNP rearrangements facilitated by PRP5 that are required for stable interaction between U2 and the branch site.