+
データを開く
-
基本情報
登録情報 | データベース: SASBDB / ID: SASDF65 |
---|---|
![]() | Resistance to inhibitors of cholinesterase 8 homolog A (Ric8a) amino acids 1-492
|
機能・相同性 | ![]() G-protein alpha-subunit binding / protein folding chaperone / guanyl-nucleotide exchange factor activity / cell cortex / G protein-coupled receptor signaling pathway / plasma membrane / cytoplasm 類似検索 - 分子機能 |
生物種 | ![]() ![]() |
![]() | ![]() タイトル: Structural underpinnings of Ric8A function as a G-protein α-subunit chaperone and guanine-nucleotide exchange factor. 著者: Dhiraj Srivastava / Lokesh Gakhar / Nikolai O Artemyev / ![]() 要旨: Resistance to inhibitors of cholinesterase 8A (Ric8A) is an essential regulator of G protein α-subunits (Gα), acting as a guanine nucleotide exchange factor and a chaperone. We report two crystal ...Resistance to inhibitors of cholinesterase 8A (Ric8A) is an essential regulator of G protein α-subunits (Gα), acting as a guanine nucleotide exchange factor and a chaperone. We report two crystal structures of Ric8A, one in the apo form and the other in complex with a tagged C-terminal fragment of Gα. These structures reveal two principal domains of Ric8A: an armadillo-fold core and a flexible C-terminal tail. Additionally, they show that the Gα C-terminus binds to a highly-conserved patch on the concave surface of the Ric8A armadillo-domain, with selectivity determinants residing in the Gα sequence. Biochemical analysis shows that the Ric8A C-terminal tail is critical for its stability and function. A model of the Ric8A/Gα complex derived from crosslinking mass spectrometry and molecular dynamics simulations suggests that the Ric8A C-terminal tail helps organize the GTP-binding site of Gα. This study lays the groundwork for understanding Ric8A function at the molecular level. |
![]() |
|
-
構造の表示
構造ビューア | 分子: ![]() ![]() |
---|
-
ダウンロードとリンク
-モデル
モデル #3128 | ![]() タイプ: atomic / コメント: One state model / カイ2乗値: 1.50747614912 ![]() |
---|---|
モデル #3129 | ![]() タイプ: atomic コメント: Fractional contribution in X-ray scattering: 59% カイ2乗値: 1.19852188057 ![]() |
モデル #3130 | ![]() タイプ: atomic コメント: Fractional contribution in X-ray scattering: 29% カイ2乗値: 1.19852188057 ![]() |
モデル #3131 | ![]() タイプ: atomic コメント: Fractional contribution in X-ray scattering: 12% カイ2乗値: 1.19852188057 ![]() |
-
試料
![]() | 名称: Resistance to inhibitors of cholinesterase 8 homolog A (Ric8a) amino acids 1-492 試料濃度: 10 mg/ml |
---|---|
バッファ | 名称: 20 mM Tris, 150 mM KCl, 5 % glycerol, 1 mM TCEP / pH: 8 |
要素 #1575 | 名称: Ric8a / タイプ: protein 記述: Resistance to inhibitors of cholinesterase 8 homolog A 分子量: 55.643 / 分子数: 1 / 由来: Bos taurus / 参照: UniProt: Q5E9J8 配列: GHMADPRAVA DALETGEEDV VMEALRAYNR ENSQSFTFDD AQQEDRKRLA KLLVSVLEQG LPPSRRVIWL QSIRILSRDR SCLDSFTSRR SLQALACYAG ISASQGSVPE PLNMDVVLES LKCLCNLVLS SPVAQALAAE AGLVVRLAER VGLCRQSSFP HDVQFFDLRL ...配列: GHMADPRAVA DALETGEEDV VMEALRAYNR ENSQSFTFDD AQQEDRKRLA KLLVSVLEQG LPPSRRVIWL QSIRILSRDR SCLDSFTSRR SLQALACYAG ISASQGSVPE PLNMDVVLES LKCLCNLVLS SPVAQALAAE AGLVVRLAER VGLCRQSSFP HDVQFFDLRL LFLLTALRTD VRQQLFQELQ GVRLLTRALE LTLGMTEGER HPELLPPQET ERAMEILKVL FNITFDSIKR EVDEEDAALY RHLGTLLRHC VMLAAAGDRT EELHGHAVNL LGNLPVKCLD VLLTLEPHEG SLEFLGVNMD VIRVLLSFME KRLHQTHRLK ESVAPVLSVL TECARMHRPA RKFLKAQVLP PLRDVRTRPE VGELLRNKLV RLMTHLDTDV KRVAAEFLFV LCSESVPRFI KYTGYGNAAG LLAARGLMAG GRPEGQYSED EDTDTDEYKE AKASINPVTG RVEEKPPNPM EGMTEEQKEH EAMKLVNMFD KLSRH |
-実験情報
ビーム | 設備名称: Advanced Photon Source (APS), Argonne National Laboratory BioCAT 18ID 地域: Lemont, IL / 国: USA ![]() | ||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
検出器 | 名称: Pilatus3 X 1M / Pixsize x: 0.172 mm | ||||||||||||||||||||||||||||||
スキャン | 測定日: 2018年10月27日 / 保管温度: 4 °C / セル温度: 25 °C / 照射時間: 0.5 sec. / 単位: 1/A /
| ||||||||||||||||||||||||||||||
距離分布関数 P(R) |
| ||||||||||||||||||||||||||||||
結果 |
|