生物轻质材料:头足动物软体动物的内骨架
Erika Griesshaber1, Antonio G Checa2, Carmen Salas3
1Department fur Geo- und Umweltwissenschaften, Ludwig-Maximilians-Universität München, Munich, Germany.
Journal of structural biology
|June 26, 2023
概括
在Spirula spirula和Sepia officinalis中的头足动物内骨架是轻量浮力装置. 它们独特的矿物/生物聚合物结构,包括胆固醇液晶,使它们能够进行独特的海洋迁移和浮力调节.
科学领域:
- 生物材料科学 生物材料科学
- 海洋生物学 海洋生物学
- 结构生物学 结构生物学
背景情况:
- 生物硬组织提供支持和浮力等关键功能.
- 头足类软体动物利用复杂的内骨架来调节海洋运动和浮力.
研究的目的:
- 研究Spirula spirula和Sepia officinalis中的内骨架的结构和组成特征.
- 阐明骨元素形态,材料特性和浮力功能的关系.
- 为了比较卷状和平面内骨架在不同海洋环境中的不同适应性.
主要方法:
- 电子反射衍射 (EBSD) 用于微观结构分析.
- 传输电子显微镜 (TEM) 和场辐射扫描电子显微镜 (FE-SEM) 用于高分辨率成像.
- 激光共聚焦显微镜用于结构可视化.
主要成果:
- 斯皮鲁拉和塞皮亚的内骨架都是轻质矿物质/生物聚合物混合体,使其能够浮力.
- 特定的骨元素表现出独特的形态,晶体结构和生物聚合物排列.
- 有机成分具有胆固醇液晶结构,有助于机械性能和浮力调节.
- 螺旋体 (Spirula) 和平面体 (Sepia) 内骨显示出分别对垂直和水平运动具有明显的结构适应.
结论:
- 头足动物内骨架的进化性质,以及它们的混合组成和液晶有机相,对于浮力和运动至关重要.
- 形态学和结构安排是微调的,以实现特定的功能和在不同的海洋息地生存.
- 这些发现突出了海洋无脊椎动物为生态成功所采用的复杂生物材料策略.
更多相关视频
11:25A Millimeter Scale Flexural Testing System for Measuring the Mechanical Properties of Marine Sponge Spicules
Published on: October 11, 2017
9.4K
15:39Characterization of Calcification Events Using Live Optical and Electron Microscopy Techniques in a Marine Tubeworm
Published on: February 28, 2017
8.3K
相关概念视频
01:39Mechanism of Filopodia Formation
2.4K
Filopodia are thin, actin-rich cellular protrusions that play an important role in many fundamental cellular functions. They vary in their occurrence, length, and positioning in different cell types, suggesting their diverse roles.
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
2.4K
01:31Mechanism of Lamellipodia Formation
2.6K
Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...
2.6K
01:17Studying the Cytoskeleton
6.3K
The cytoskeletal architecture can be studied using different microscopic and biochemical techniques. Electron microscopy was instrumental in discovering the cytoskeletal architecture around the 1960s, which allowed obtaining structural information at a high-resolution level. However, the sample preparation procedure often limits this ability in biological samples. Several protocols have been developed over the years to optimize sample preparation. In one of the protocols known as rotary...
6.3K