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收缩状态下软体动物平滑肌的X射线衍射研究。

An x-ray diffraction study of contracting molluscan smooth muscle.

作者信息

Millman B M, Elliott G F

出版信息

Biophys J. 1972 Nov;12(11):1405-14. doi: 10.1016/S0006-3495(72)86171-X.

DOI:10.1016/S0006-3495(72)86171-X
PMID:4642219
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC1484200/
Abstract

The living anterior byssus retractor muscle of Mytilus (ABRM), a smooth, "catch" muscle, has been studied by X-ray diffraction while relaxed and while tonically contracted. X-ray reflections were observed from the actin and paramyosin filaments and from the alpha-helical substructure of the paramyosin filaments. No differences in spacings or relative intensities were observed when the relaxed and contracting muscle patterns were compared. This result is consistent with a sliding filament mechanism involving an interaction between actin and paramyosin filaments.

摘要

贻贝的活体前足丝牵缩肌（ABRM）是一种光滑的“捕捉”肌肉，已经通过X射线衍射对其松弛状态和强直性收缩状态进行了研究。从肌动蛋白丝和副肌球蛋白丝以及副肌球蛋白丝的α-螺旋亚结构观察到了X射线反射。比较松弛和收缩肌肉的模式时，未观察到间距或相对强度的差异。这一结果与涉及肌动蛋白丝和副肌球蛋白丝之间相互作用的滑动丝机制一致。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7541/1484200/ec1b7de86f8b/biophysj00717-0040-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7541/1484200/ec1b7de86f8b/biophysj00717-0040-a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7541/1484200/ec1b7de86f8b/biophysj00717-0040-a.jpg

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