- PDB-2r15: Crystal structure of the myomesin domains 12 and 13 -
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基本情報
登録情報
データベース: PDB / ID: 2r15
タイトル
Crystal structure of the myomesin domains 12 and 13
要素
Myomesin-1
キーワード
CONTRACTILE PROTEIN / SARCOMERIC PROTEIN / IG-LIKE DOMAINS / HOMODIMER / Immunoglobulin domain / Muscle protein / Thick filament
機能・相同性
機能・相同性情報
extraocular skeletal muscle development / striated muscle myosin thick filament / protein kinase A signaling / M band / structural constituent of muscle / sarcomere organization / positive regulation of protein secretion / kinase binding / positive regulation of gene expression / protein homodimerization activity / identical protein binding 類似検索 - 分子機能
: / Immunoglobulin I-set / Immunoglobulin I-set domain / Fibronectin type III domain / Fibronectin type 3 domain / Immunoglobulin subtype 2 / Immunoglobulin C-2 Type / Fibronectin type-III domain profile. / Fibronectin type III / Fibronectin type III superfamily ...: / Immunoglobulin I-set / Immunoglobulin I-set domain / Fibronectin type III domain / Fibronectin type 3 domain / Immunoglobulin subtype 2 / Immunoglobulin C-2 Type / Fibronectin type-III domain profile. / Fibronectin type III / Fibronectin type III superfamily / Immunoglobulin subtype / Immunoglobulin / Ig-like domain profile. / Immunoglobulin-like domain / Immunoglobulin-like domain superfamily / Immunoglobulin-like fold / Immunoglobulins / Immunoglobulin-like / Sandwich / Mainly Beta 類似検索 - ドメイン・相同性
ジャーナル: EMBO J / 年: 2008 タイトル: Molecular basis of the C-terminal tail-to-tail assembly of the sarcomeric filament protein myomesin. 著者: Nikos Pinotsis / Stephan Lange / Jean-Claude Perriard / Dmitri I Svergun / Matthias Wilmanns / 要旨: Sarcomeric filament proteins display extraordinary properties in terms of protein length and mechanical elasticity, requiring specific anchoring and assembly mechanisms. To establish the molecular ...Sarcomeric filament proteins display extraordinary properties in terms of protein length and mechanical elasticity, requiring specific anchoring and assembly mechanisms. To establish the molecular basis of terminal filament assembly, we have selected the sarcomeric M-band protein myomesin as a prototypic filament model. The crystal structure of the myomesin C-terminus, comprising a tandem array of two immunoglobulin (Ig) domains My12 and My13, reveals a dimeric end-to-end filament of 14.3 nm length. Although the two domains share the same fold, an unexpected rearrangement of one beta-strand reveals how they are evolved into unrelated functions, terminal filament assembly (My13) and filament propagation (My12). The two domains are connected by a six-turn alpha-helix, of which two turns are void of any interactions with other protein parts. Thus, the overall structure of the assembled myomesin C-terminus resembles a three-body beads-on-the-string model with potentially elastic properties. We predict that the found My12-helix-My13 domain topology may provide a structural template for the filament architecture of the entire C-terminal Ig domain array My9-My13 of myomesin.
モノクロメーター: GE SINGLE CRYSTAL CRYSTAL / プロトコル: MAD / 単色(M)・ラウエ(L): M / 散乱光タイプ: x-ray
放射波長
ID
波長 (Å)
相対比
1
0.8126
1
2
0.91837
1
3
0.98214
1
4
0.98264
1
反射
解像度: 2.24→20 Å / Num. obs: 25757 / % possible obs: 95.7 % / Observed criterion σ(I): 0 / 冗長度: 4.9 % / Rmerge(I) obs: 0.076 / Net I/σ(I): 9.9
反射 シェル
解像度: 2.24→2.28 Å / 冗長度: 4.4 % / Rmerge(I) obs: 0.382 / % possible all: 93.2
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解析
ソフトウェア
名称
バージョン
分類
CNS
精密化
REFMAC
5.2.0005
精密化
MAR345
データ収集
DENZO
データ削減
SCALEPACK
データスケーリング
CNS
位相決定
精密化
構造決定の手法: 多波長異常分散 / 解像度: 2.24→19.87 Å / Cor.coef. Fo:Fc: 0.955 / Cor.coef. Fo:Fc free: 0.942 / SU B: 13.663 / SU ML: 0.167 / TLS residual ADP flag: LIKELY RESIDUAL / 交差検証法: THROUGHOUT / σ(F): 0 / ESU R: 0.249 / ESU R Free: 0.188 / 立体化学のターゲット値: MAXIMUM LIKELIHOOD 詳細: THE MAD DATA SET WAS USED ONLY UP TO INITIAL DENSITY MODIFICATION
Rfactor
反射数
%反射
Selection details
Rfree
0.223
683
2.7 %
RANDOM
Rwork
0.196
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obs
-
25697
100 %
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溶媒の処理
イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: BABINET MODEL WITH MASK