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Protein Complexes with Interchangeable Parts

Protein Complexes with Interchangeable Parts

Groups of proteins may form a complex where each protein in this complex has a different role in the overall execution of the complex’s function. Often some of the proteins in the complex can be replaced by a closely related variant to give a complex that contains many of the same components yet is functionally distinct.
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...

Protein Complexes with Interchangeable Parts

Protein Complexes with Interchangeable Parts

Mechanical Protein Functions

Mechanical Protein Functions

Proteins perform many mechanical functions in a cell. These proteins can be classified into two general categories- proteins that generate mechanical forces and proteins that are subjected to mechanical forces. Proteins providing mechanical support to the structure of the cell, such as keratin, are subjected to mechanical force, whereas proteins involved in cell movement and transport of molecules across cell membranes, such as an ion pump, are examples of generating mechanical force.

Mechanical Protein Function

Mechanical Protein Function

Structural Protein Function

Structural Protein Function

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...

Structural Protein Function

Structural Protein Function

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Capture Compound Mass Spectrometry - A Powerful Tool to Identify Novel c-di-GMP Effector Proteins

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Published on: March 29, 2015

GRASP55: A Multifunctional Protein.

Hongrong Wu¹, Tianjiao Li², Jianfeng Zhao³

¹Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hengyang, China.

Current Protein & Peptide Science

|February 19, 2020

Summary

This summary is machine-generated.

Golgi stacking protein GRASP55 is vital for protein modification and trafficking. It also plays key roles in stress-induced secretion, autophagy, and overall cell activity.

Keywords:

Autophagy GRASP55 Golgi Golgin45 Unconventional secretory pathway Vesicular trafficking

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The Multifaceted Benefits of Protein Co-expression in Escherichia coli

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Published on: February 5, 2015

Area of Science:

Cell Biology
Molecular Biology
Biochemistry

Background:

Golgi cisternae stacking protein 55 (GRASP55) is essential for Golgi apparatus structure and function.
The Golgi apparatus plays a critical role in protein modification and vesicular trafficking.
Understanding GRASP55's functions is key to comprehending cellular processes.

Purpose of the Study:

To elucidate the multifaceted roles of GRASP55 beyond its initial identification.
To investigate GRASP55's involvement in protein modification and trafficking pathways.
To explore GRASP55's function in unconventional secretion, autophagy, and cell activity.

Main Methods:

Literature review and analysis of existing research on GRASP55.
Functional studies examining GRASP55's impact on Golgi structure.
Investigation of GRASP55's role in secretory pathways and autophagy.

Main Results:

GRASP55 is confirmed to be crucial for Golgi cisternae stacking.
GRASP55 significantly influences protein modification and vesicular transport.
GRASP55 participates in the unconventional secretory pathway during cellular stress.
GRASP55 is implicated in the initiation and maturation of autophagy.
GRASP55 affects overall cell activity and viability.

Conclusions:

GRASP55 is a multifunctional protein with diverse roles in cellular homeostasis.
Its functions extend from Golgi structure to complex processes like autophagy and stress response.
GRASP55 is a key regulator of essential cellular activities, highlighting its importance in cell biology.