Outer Envelope Protein
Outer Envelope Protein - Related Videos
01:18
Outer Layers of the Cell Envelope
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2025
The outermost layers of prokaryotic cells play a critical role in their survival, virulence, and interaction with the environment. These layers, often composed of polysaccharides, polypeptides, or proteins, form protective and adhesive structures that vary in organization and function.Capsules and Slime LayersCapsules are highly organized, tightly bound layers that firmly attach to the bacterial cell wall. Capsules are usually made of polysaccharides, though some are made of polypeptides. These...
01:11
Protein Transport to the Outer Chloroplast Membrane
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2023
Chloroplast outer membrane proteins encoded by the nucleus are synthesized in the cytosol. Soon after synthesis, they bind cytosolic factors such as 14-3-3 protein and the Hsp70 chaperones that keep these precursors in an unfolded state until their translocation. Two models describe the mechanism of precursor recognition and entry across the outer membrane through the TOC complex. Model 1 suggests the newly synthesized precursor binds to the TOC receptor 159 and forms a complex.
09:55
From Constructs to Crystals – Towards Structure Determination of β-barrel Outer Membrane Proteins
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Cited by 8 •
2016
β-barrel outer membrane proteins (OMPs) serve many functions within the outer membranes of Gram-negative bacteria, mitochondria, and chloroplasts. Here, we hope to alleviate a known bottleneck in structural studies by presenting protocols for the production of β-barrel OMPs in sufficient quantities for structure determination by X-ray crystallography or NMR spectroscopy.
10:24
Separation of the Cell Envelope for Gram-negative Bacteria into Inner and Outer Membrane Fractions with Technical Adjustments for Acinetobacter baumannii
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Cited by 33 •
2020
Gram-negative bacteria produce two spatially segregated membranes. The outer membrane is partitioned from the inner membrane by a periplasm and a peptidoglycan layer. The ability to isolate the dual bilayers of these microbes has been critical for understanding their physiology and pathogenesis.
10:21
Directed Protein Packaging within Outer Membrane Vesicles from Escherichia coli: Design, Production and Purification
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Cited by 12 •
2016
A protocol for the production, purification, and use of enzyme packaged outer membrane vesicles (OMV) providing for enhanced enzyme stability for implementation across diverse applications is presented.
FAQs
Specific receptor binding helps determine which host cells a virus can engage, making receptor compatibility a key contributor to viral tropism, meaning the pattern of cells or hosts that can be infected. Differences in receptor availability can therefore change where entry is possible and help explain variation in infection patterns.
After receptor engagement, an outer envelope protein may change shape in a way that exposes fusion machinery. This transition connects recognition of the host cell with the membrane-merging step required for entry. Studying these changes helps clarify how a virus progresses from attachment to productive access inside a host cell.
Its position at the viral surface makes the protein relevant to immune recognition, because host defenses can encounter it while assessing the viral particle. Changes in the protein may influence how the virus is recognized without necessarily eliminating its entry function, making immune recognition an important consideration in studying infection and antigen design.
Mutations in an outer envelope protein can alter properties linked to receptor interaction, entry, or immune recognition. As a result, they may change the cells or hosts a virus can engage and may affect transmission. Monitoring these mutations provides a way to investigate shifts in viral behavior and potential changes in host range.
A focused investigation can examine receptor binding, the conformational transition that exposes fusion machinery, and the resulting ability to support membrane merging. Researchers can then relate those observations to viral tropism and immune recognition. This sequence organizes the study around distinct stages of entry rather than treating infection as a single event.
Vaccine antigen design can use knowledge of the protein’s surface location and its role in immune recognition. Researchers can consider how an antigen represents features encountered on the viral particle while also accounting for regions involved in receptor binding or entry. This connection helps relate antigen selection to the biological functions most relevant to infection.
The protein provides two complementary research targets. Its role in receptor engagement and fusion-related conformational change can guide efforts to interfere with viral entry, while surveillance of mutations can identify changes that may affect host range or transmission. Together, these uses connect mechanistic biology with monitoring and intervention strategies.