SPring-8, the large synchrotron radiation facility

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単一筋原繊維からの回折

  • Only SPring-8

Inquiry number

SOL-0000003405

Beamline

BL45XU (Macromolecular Crystallography II)

Scientific keywords

A. Sample category biology, medicine, research on method, instrumentation
B. Sample category (detail) organism, cell, protein
C. Technique X-ray diffraction
D. Technique (detail) small angle scattering
E. Particular condition microbeam (1-10 µm), 2D imaging
F. Photon energy X-ray (4-40 keV)
G. Target information structure analysis, structural hierarchy

Industrial keywords

level 1---Application area Pharmaceuticals, others
level 2---Target fiber
level 3---Target (detail) protein, organism
level 4---Obtainable information crystal structure, orientation (preferred orientation), structure
level 5---Technique diffraction, X-ray diffraction, SAX, scattering, SAXS

Classification

M20.10 SAX

Body text

筋肉細胞内にある直径わずか2マイクロメートルの筋原繊維1本からX線回折像を記録し、その中の収縮蛋白の格子構造を直接可視化することに成功した。これは、細胞内にある水和した蛋白質の集合体でX線回折像が記録された最小の例となる(体積にして 従来の約1/1000)。さらに蛋白集合体の単一格子からの回折像記録も世界初である。今回の成果は、他にも細胞内に多種存在する微小な機能性蛋白質集合体にX線回折による構造解析の道を拓くことになり、ポスゲノム時代の生物学に新たな研究手段を提供することになろう。

Iwamoto_fig3.jpg
 

図:マルハナバチ飛翔筋筋細胞から実際に記録されたエンドオン回折像
(左はビームサイズ50μm、右の2つは2μm)。

Source of the figure

Bulletin from SPring-8

Bulletin title

http://www.spring8.or.jp/j/press/020806/muscle_fibril.html

Page

Technique

Source of the figure

No figure

Required time for experimental setup

6 shift(s)

Instruments

Instrument Purpose Performance
BL45XU-SAXS SAXS, Microbeam

References

Document name
Biophysical Journal Volume 83 August 2002 1074–1081

Related experimental techniques

Questionnaire

The measurement was possible only in SPring-8. Impossible or very difficult in other facilities.
With user's own instruments.

Ease of measurement

With a great skill

Ease of analysis

With a great skill

How many shifts were needed for taking whole data in the figure?

Four-nine shifts

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