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相关概念视频

Fibril-associated Collagen01:11

Fibril-associated Collagen

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Fibril-associated collagens are a type of collagens present in the extracellular matrix with interrupted triple helices or FACIT (Fibril-associated collagens interrupted triple-helices). FACIT help connect and attach the collagen fibrils with each other as well as with other proteins of the extracellular matrix.
For example, the type II collagen fibrils in cartilage have covalently bound type IX fibril-associated collagens at regular intervals. Other types of fibril-associated collagens are...
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Type IV Collagen of Basal Lamina01:05

Type IV Collagen of Basal Lamina

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Type IV collagen is a 400 nm long, network-forming collagen that acts as a barrier between the epithelial and endothelial cells. Type IV collagen  forms the backbone of the basement membrane by scaffolding with laminin, entactin, proteoglycans, and fibronectin. Apart from rendering structural support to the basement membrane, it also helps entail signaling potentials necessary for both pathological and physiological functions.
A type IV collagen molecule has six alpha chains which can...
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Collagens are the Major Structural Proteins of ECM01:13

Collagens are the Major Structural Proteins of ECM

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Three main types of fibers are secreted by fibroblasts: collagen fibers, elastic fibers, and reticular fibers. Collagen fiber is made from fibrous protein subunits linked together to form a long, straight fiber. Collagen fibers, while flexible, have great tensile strength, resist stretching, and give ligaments and tendons their characteristic resilience and strength. These fibers hold connective tissues together, even during the body's movement.
Connective tissue proper includes loose...
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Structural Protein Function01:56

Structural Protein Function

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Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin.
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity.  In bones and teeth, it mineralizes to...
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Protein Folding01:22

Protein Folding

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Overview
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Protein Folding01:25

Protein Folding

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Proteins are chains of amino acids linked together by peptide bonds. Upon synthesis, a protein folds into a three-dimensional conformation, critical to its biological function. Interactions between its constituent amino acids guide protein folding, and hence the protein structure is primarily dependent on its amino acid sequence.
Protein Structure Is Critical to Its Biological Function
Proteins perform a wide range of biological functions such as catalyzing chemical reactions, providing...
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相关实验视频

Updated: Mar 18, 2026

Preparation of 3D Collagen Gels and Microchannels for the Study of 3D Interactions In Vivo
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Preparation of 3D Collagen Gels and Microchannels for the Study of 3D Interactions In Vivo

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稳定三螺旋原的一般解决方案

Yitao Zhang1, Madison Herling1, David M Chenoweth1

  • 1Department of Chemistry, University of Pennsylvania , 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States.

Journal of the American Chemical Society
|July 14, 2016
PubMed
概括
此摘要是机器生成的。

在酸中用aza-glycine取代糖氨酸可以通过额外的键增强稳定性和自我组装性. 这种策略优化了设计的材料,并稳定了原三环.

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In vitro Synthesis of Native, Fibrous Long Spacing and Segmental Long Spacing Collagen

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科学领域:

  • 生物化学
  • 材料科学
  • 结构生物学

背景情况:

  • 键对于生物分子结构和稳定性至关重要.
  • 自然界的蛋白质构建块由于依赖结合而存在局限性.
  • 原蛋白的结构是通过键稳定,而甘氨酸是保存的残留物.

研究的目的:

  • 研究用aza-glycine替换原蛋白中的影响.
  • 探索对原蛋白稳定性和自我组装的影响.
  • 开发一种稳定原三螺旋体的新策略,并设计质材料.

主要方法:

  • 通过aza-glycine替代物合成原蛋白.
  • 对的稳定性和自组合性能的分析.
  • 由阿扎甘氨酸诱导的结构变化的表征.

主要成果:

  • 替代阿扎甘氨酸显著提高了原蛋白的稳定性和自我组装.
  • 完全取代甘氨酸残留物是可能的阿扎甘氨酸.
  • 实现了最小的自组合系统.
  • 证明了脱溶接口中的结合的重要性.

结论:

  • 阿扎甘氨酸提供了额外的键供体,改善了原的稳定性.
  • 这种修改为优化设计材料提供了一种新的策略.
  • 确定了一种稳定原三环的通用解决方案.