ICln / Protein ICln/Lot5/Saf5 / Regulator of volume decrease after cellular swelling / Small nuclear ribonucleoprotein D1 / SH3 type barrels. - #100 / Small nuclear ribonucleoprotein Sm D2 / Small nuclear ribonucleoprotein E / Small nuclear ribonucleoprotein G / Small nuclear ribonucleoprotein F / Sm-like protein Lsm7/SmG ...ICln / Protein ICln/Lot5/Saf5 / Regulator of volume decrease after cellular swelling / Small nuclear ribonucleoprotein D1 / SH3 type barrels. - #100 / Small nuclear ribonucleoprotein Sm D2 / Small nuclear ribonucleoprotein E / Small nuclear ribonucleoprotein G / Small nuclear ribonucleoprotein F / 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 / : / Sm domain profile. / LSM domain superfamily / Pleckstrin-homology domain (PH domain)/Phosphotyrosine-binding domain (PTB) / PH-domain like / SH3 type barrels. / PH-like domain superfamily / Roll / Mainly Beta 類似検索 - ドメイン・相同性
Methylosome subunit pICln / Small nuclear ribonucleoprotein E / Small nuclear ribonucleoprotein G / Small nuclear ribonucleoprotein Sm D1 / Small nuclear ribonucleoprotein Sm D2 / Small nuclear ribonucleoprotein F 類似検索 - 構成要素
ジャーナル: Mol Cell / 年: 2013 タイトル: Structural basis of assembly chaperone- mediated snRNP formation. 著者: Clemens Grimm / Ashwin Chari / Jann-Patrick Pelz / Jochen Kuper / Caroline Kisker / Kay Diederichs / Holger Stark / Hermann Schindelin / Utz Fischer / 要旨: Small nuclear ribonucleoproteins (snRNPs) represent key constituents of major and minor spliceosomes. snRNPs contain a common core, composed of seven Sm proteins bound to snRNA, which forms in a step- ...Small nuclear ribonucleoproteins (snRNPs) represent key constituents of major and minor spliceosomes. snRNPs contain a common core, composed of seven Sm proteins bound to snRNA, which forms in a step-wise and factor-mediated reaction. The assembly chaperone pICln initially mediates the formation of an otherwise unstable pentameric Sm protein unit. This so-called 6S complex docks subsequently onto the SMN complex, which removes pICln and enables the transfer of pre-assembled Sm proteins onto snRNA. X-ray crystallography and electron microscopy was used to investigate the structural basis of snRNP assembly. The 6S complex structure identifies pICln as an Sm protein mimic, which enables the topological organization of the Sm pentamer in a closed ring. A second structure of 6S bound to the SMN complex components SMN and Gemin2 uncovers a plausible mechanism of pICln elimination and Sm protein activation for snRNA binding. Our studies reveal how assembly factors facilitate formation of RNA-protein complexes in vivo.
A: Small nuclear ribonucleoprotein Sm D1 B: Small nuclear ribonucleoprotein Sm D2 C: Small nuclear ribonucleoprotein Sm D1 D: Small nuclear ribonucleoprotein Sm D2 E: Small nuclear ribonucleoprotein E H: Small nuclear ribonucleoprotein E F: Small nuclear ribonucleoprotein F I: Small nuclear ribonucleoprotein F G: Small nuclear ribonucleoprotein G J: Small nuclear ribonucleoprotein G Q: Methylosome subunit pICln P: Methylosome subunit pICln ヘテロ分子
A: Small nuclear ribonucleoprotein Sm D1 B: Small nuclear ribonucleoprotein Sm D2 E: Small nuclear ribonucleoprotein E F: Small nuclear ribonucleoprotein F G: Small nuclear ribonucleoprotein G P: Methylosome subunit pICln
C: Small nuclear ribonucleoprotein Sm D1 D: Small nuclear ribonucleoprotein Sm D2 H: Small nuclear ribonucleoprotein E I: Small nuclear ribonucleoprotein F J: Small nuclear ribonucleoprotein G Q: Methylosome subunit pICln ヘテロ分子
THE SEQUENCE FOR CHAIN P AND Q (PICLN) MATCHES TO THE SEQEUNCE OF GENBANK ACCESSION NO AAF21126. ...THE SEQUENCE FOR CHAIN P AND Q (PICLN) MATCHES TO THE SEQEUNCE OF GENBANK ACCESSION NO AAF21126. THE MISMATCH TO UNP ACCESS A1ZAW5 AT POSITION 6 IS DUE TO POLYMORPHISM.
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実験情報
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実験
実験
手法: X線回折 / 使用した結晶の数: 1
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試料調製
結晶
マシュー密度: 2.07 Å3/Da / 溶媒含有率: 40.7 %
結晶化
温度: 293 K / 手法: 蒸気拡散法, ハンギングドロップ法 / pH: 7 詳細: 15% Jeffamine ED-2003 titrated to pH 7, 10% ethanol, VAPOR DIFFUSION, HANGING DROP, temperature 293K