Membrane Spanning Region
Membrane Spanning Region - Related Videos
07:20
Imaging ATG9A, a Multi-Spanning Membrane Protein
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Cited by 3 •
2023
This protocol describes various methods that can help in the study of ATG9A biology, including immunofluorescence followed by image analysis, transient overexpression considerations, and investigating the ATG9A glycosylation status using western blot.
06:44
Measuring Verbal Working Memory Span
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University Why is it relatively hard to remember everything on a shopping list if it includes more than just a handful of items? Why is it possible to remember a phone number that one just heard, but not two or three phone numbers at once? Why is it difficult to remember names when several new people are introduced at the same time? The answer has to do with the fact that over short-durations people rely on a specialized memory system...
01:20
Spanning Openings in Brick Walls
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2024
In brick wall construction, supporting structures are crucial for openings like windows and doors to maintain the integrity and support the weight of the wall above. These supports include lintels, corbels, and arches, each serving specific structural purposes. Lintels are primary supports used to span openings and can be crafted from materials such as reinforced concrete, steel-reinforced brick masonry, or simple steel angles. These are straightforward to install and are typically concealed...
10:00
In Vitro Culture of Epithelial Cells from Different Anatomical Regions of the Human Amniotic Membrane
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Cited by 8 •
2019
This protocol describes the isolation of epithelial cells from different anatomical regions of the human amniotic membrane to determine their heterogeneity and functional properties for possible application in clinical and physiopathological models.
01:03
IR Frequency Region: Fingerprint Region
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2024
IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the C=O, C=N, and C=C occur between 1600–1850 cm−1. The...
FAQs
A stretch of hydrophobic amino acids can fold into an alpha helix, placing nonpolar side chains against the bilayer’s lipid tails. This arrangement reduces unfavorable interactions between the protein and the membrane interior, helping the region remain embedded. The resulting helix provides a stable structural anchor for the rest of the membrane protein.
Polar or charged residues do not simply support membrane anchoring; they can face aqueous environments or line internal pathways through the protein. Their placement allows a membrane protein to accommodate water or support movement of molecules across the bilayer. Consequently, the same region can contribute both structural stability and transport-related function.
The arrangement of membrane spanning regions helps determine protein topology, meaning the orientation of its functional domains on opposite sides of the membrane. That positioning can enable a protein to detect an external stimulus, transmit information across the bilayer, or coordinate molecular movement. Changes in this arrangement would therefore affect how the protein interacts with its surroundings.
Recognizing a hydrophobic amino acid sequence that may form a membrane spanning region helps researchers predict which parts of a protein enter the lipid bilayer. It also provides clues about the protein’s topology and the likely locations of functional domains. These predictions support structural and functional interpretation before the protein’s complete organization is understood.
In transport proteins, membrane spanning regions can help form pathways that move molecules through the bilayer. In signaling proteins, they connect membrane-embedded structure with functional domains positioned on either side, allowing stimuli to be detected and communicated across the membrane. These roles make the regions central to both molecular movement and cellular communication.
Their ability to anchor proteins in a lipid bilayer and organize domains across the membrane supports several major biological processes. In cell adhesion, membrane proteins can be positioned to participate in interactions between cells or with their surroundings. In energy conversion, the same membrane-embedded architecture helps proteins carry out functions that depend on the membrane’s organization.