Glycoprotein Isolation
Glycoprotein Isolation - Related Videos
03:59
Isolation and Purification of Recombinant Myelin Oligodendrocyte Glycoproteins
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2025
Source: Jain, R. W., et al. Simple and Efficient Production and Purification of Mouse Myelin Oligodendrocyte Glycoprotein for Experimental Autoimmune Encephalomyelitis Studies. J. Vis. Exp. (2016)This video demonstrates the isolation and purification of MOGtag, a recombinant Myelin Oligodendrocyte Glycoprotein (MOG) used in Experimental Autoimmune Encephalomyelitis (EAE) studies. The protocol involves bacterial lysis, sonication, centrifugation, and nickel affinity chromatography to obtain...
05:42
Using a Sandwich ELISA to Determine the Immunogenic Glycoprotein Content in a Vaccine
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2025
This video showcases an indirect enzyme-linked immunosorbent assay or ELISA sandwich immunocapture assay designed to assess immunogenic glycoprotein levels in vaccines. The assay plate, containing glycoprotein-specific antibodies, is incubated with serially diluted vaccine samples, including reference and test vaccines, followed by immunoassay to quantify glycoprotein content in the test vaccine.
10:17
Pulse-chase Analysis of N-linked Sugar Chains from Glycoproteins in Mammalian Cells
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Cited by 5 •
2010
We describe a method for analysis of the alteration of N-linked glycans through the early life of glycoproteins after their biosynthesis in mammalian cells. This is achieved by pulse-chase analysis of metabolically labeled glycans, enzymatic release from glycoproteins and examination by HPLC.
01:21
Matrix Proteoglycans and Glycoproteins
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2023
Proteoglycans are extensively glycosylated proteins, commonly found in the extracellular matrix, interwoven with collagen fibers. Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers associated with large amounts of proteoglycans. These proteoglycans have long negative charges that attract cations, which in turn attract water molecules. This influx of ions and water molecules swells up the proteoglycan like a water-soaked gel that can...
08:29
Averaging of Viral Envelope Glycoprotein Spikes from Electron Cryotomography Reconstructions using Jsubtomo
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Cited by 23 •
2014
An approach is presented for determining structures of viral membrane glycoprotein complexes using a combination of electron cryo-tomography and sub-tomogram averaging with the computational package Jsubtomo.
FAQs
These properties provide distinct ways to enrich a target from a complex biological mixture. Size differences can support fractionation, while charge and hydrophobicity help separate proteins with different physical characteristics. Glycan-binding affinity adds selectivity by recognizing carbohydrate chains. Combining these separation principles improves enrichment when no single property is sufficient to distinguish the desired glycoprotein.
Glycan-binding affinity targets the carbohydrate portion attached to the protein, rather than relying only on the protein’s size, charge, or hydrophobicity. This can help enrich glycoproteins from mixtures containing proteins with similar physical properties. The approach is particularly relevant when the carbohydrate chains are important for studying cell recognition, signaling, immune responses, or host-pathogen interactions.
Preserving native structure and glycosylation helps maintain the molecular features that support a glycoprotein’s biological interpretation. Altering either feature could complicate structural or functional analysis and weaken conclusions about recognition, signaling, or immune activity. For this reason, isolation is designed not only to enrich the target, but also to retain the properties needed for downstream investigation.
Enrichment focuses on increasing the proportion of the target glycoprotein relative to other components in the mixture. Functional analysis places greater emphasis on retaining native structure and glycosylation so the purified sample remains biologically informative. Thus, the same separation options may be evaluated differently depending on whether the intended outcome is general purification, structural study, or functional characterization.
A typical workflow begins with extraction from the biological sample, followed by clarification or fractionation using centrifugation or precipitation. Chromatography can then provide additional purification by exploiting size, charge, hydrophobicity, or glycan-binding affinity. The selected sequence depends on the target and the properties of the mixture, while maintaining conditions that support preservation of native structure and glycosylation.
Researchers use isolated glycoproteins when they need to examine molecules involved in cell recognition, signaling, immune responses, or host-pathogen interactions. Purification separates the target from the complexity of the original biological mixture, making focused structural and functional analyses possible. The approach also supports biomarker investigation and informs work on therapeutics, diagnostics, and biomanufacturing methods.
Purified samples support structural and functional analyses that connect a glycoprotein’s molecular features with its biological roles. They can also contribute to biomarker investigation by providing material for focused study. In applied research, isolated glycoproteins help inform therapeutic and diagnostic development, as well as biomanufacturing approaches where controlled analysis of these molecules is important.