Host Machinery Hijacking
Host Machinery Hijacking - Related Videos
01:28
Protein Translocation Machinery on the ER Membrane
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2023
The translocon complex situated on the ER membrane is the main gateway for the protein secretory pathway. It facilitates the transport of nascent peptides into the ER lumen and their insertion into the ER membrane. Sec61 protein conducting channel In eukaryotes, the translocon complex comprises a core heterotrimeric translocator channel called the Sec61 complex. This channel includes three transmembrane proteins, Sec61α, Sec61β, and Sec61γ, and is the largest subunit of the translocon complex.
08:05
Small-scale Nuclear Extracts for Functional Assays of Gene-expression Machineries
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Cited by 37 •
2012
A protocol for preparation of robust, small-scale HeLa nuclear extracts is described. This protocol is valuable for assays that require use of small populations of cells, such as cells treated with drugs or RNAi. The method should be applicable to a wide variety of gene expression assays and other cell types, including patient cells.
10:28
The Encapsulation of Cell-free Transcription and Translation Machinery in Vesicles for the Construction of Cellular Mimics
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Cited by 12 •
2013
Herein we describe simple methods for the preparation of vesicles, the encapsulation of transcription and translation machinery, and the monitoring of protein production. The resulting cell-free systems can be used as a starting point from which to build increasingly complex cellular mimics.
08:47
Super-resolution Imaging of the Bacterial Division Machinery
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Cited by 17 •
2013
We describe a super-resolution imaging method to probe the structural organization of the bacterial FtsZ-ring, an essential apparatus for cell division. This method is based on quantitative analyses of photoactivated localization microscopy (PALM) images and can be applied to other bacterial cytoskeletal proteins.
04:15
Extracting Host Cell Lysate from Infected Host Cells Cultured in a Permeable Membrane System
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2025
This video demonstrates a permeable membrane insert system to investigate the impact of bacterial toxins on host cells in a controlled and isolated manner. This approach allows for the selective exposure of the cells to the toxins while maintaining a physical separation that mimics the natural host-pathogen interaction.
FAQs
Pathogen-encoded proteins can alter host signaling pathways and suppress host gene expression, changing which cellular responses remain active. These changes help the invading organism redirect cellular resources toward survival or reproduction. Examining signaling alterations alongside gene-expression changes can reveal how infection reshapes cell physiology and identify host-pathogen dependencies that may be therapeutically targeted.
The recruited resources can include cellular ribosomes, enzymes, membranes, organelles, and intracellular trafficking pathways. Their roles differ according to the pathogen and the stage of infection, but each provides material or logistical support for pathogen persistence or reproduction. Mapping these recruited components helps distinguish essential dependencies from broader, less specific changes in the infected cell.
A pathogen may depend on selected host processes while the cell continues to require those processes for normal function. This creates a therapeutic challenge: blocking a dependency could restrict infection, but excessive disruption could harm the host cell. Studying which redirected molecules, organelles, or regulatory systems are essential may support therapies designed to interfere with infection more selectively.
Redirecting host signaling, gene expression, membranes, trafficking, cytoskeletal processes, or immune functions can disturb normal cell physiology. These disturbances help explain why infection can produce disease effects in addition to supporting pathogen survival or reproduction. Comparing the cellular changes caused by viruses, bacteria, and parasites can clarify how different pathogen strategies lead to distinct biological outcomes.
A study can begin by identifying pathogen-encoded factors and then examining their effects on host signaling, gene expression, organelles, membranes, trafficking, or immune processes. Researchers can next determine which altered host components support pathogen survival or reproduction. This approach connects molecular interactions with changes in cell physiology and helps prioritize dependencies for further investigation.
This framework is useful when researchers need to connect pathogen activity with specific changes inside infected cells. It supports analysis of how viruses recruit ribosomes or alter gene expression, and how bacteria or parasites manipulate cytoskeletal and immune processes. The resulting interaction map can guide studies of disease mechanisms and the search for pathogen-selective intervention points.
Viral infections commonly provide examples involving pathogen proteins, host gene-expression suppression, ribosome recruitment, membrane use, and intracellular trafficking. Bacteria and parasites can additionally manipulate cytoskeletal and immune processes. Considering these categories together shows that host manipulation is biologically diverse, while preserving a common research goal: understanding which host-pathogen interactions sustain infection and disease.