ArticleBiochimica et biophysica acta. Biomembranes2021
Membrane protein extraction and purification using partially-esterified SMA polymers.
Article in Biochimica et biophysica acta. Biomembranes, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.
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Who cites it
18 citing papers in PubMed, 29 citations in OpenAlex.
- Saponin Chemistry Controls Anionic Lipid Tolerance and Divalent Metal Ion Responses in Magnetically Alignable Bicelles.bioRxiv : the preprint server for biology · 2026Article
- Overcoming divalent cation sensitivity is not the only challenge for functional study of ABC transporters within polymer lipid particles.Bioscience reports · 2026Article
- RePol: A high-throughput screen for optimizing membrane protein solubilization and purification using polymers.Protein science : a publication of the Protein Society · 2026Article
- Molecular basis for multidrug efflux by an anaerobic-associated RND transporter.Nature communications · 2025Article
- Deciphering the molecular mechanism of the bacterial division motor TolQRA.Cell discovery · 2025Article
- Expanding the Reach of Membrane Protein-Ligand Interaction Studies Through the Integration of Mass Spectrometry and Membrane Mimetics.Proteomics · 2025Review
- Amphiphilic Copolymers and Their Role in the Study of Membrane Proteins.The journal of physical chemistry letters · 2025Review
- A proteome-wide quantitative platform for nanoscale spatially resolved extraction of membrane proteins into native nanodiscs.Nature methods · 2025Article
- Characterization of intact FeoB in a lipid bilayer using styrene-maleic acid (SMA) copolymers.Biochimica et biophysica acta. Biomembranes · 2025Article
- Discovery of Therapeutic Antibodies Targeting Complex Multi-Spanning Membrane Proteins.BioDrugs : clinical immunotherapeutics, biopharmaceuticals and gene therapy · 2024Review
- Vinyl Ether Maleic Acid Polymers: Tunable Polymers for Self-Assembled Lipid Nanodiscs and Environments for Membrane Proteins.Biomacromolecules · 2024Article
- A proteome-wide quantitative platform for nanoscale spatially resolved extraction of membrane proteins into native nanodiscs.bioRxiv : the preprint server for biology · 2024Article
- Purification of Potassium Ion Channels Using Styrene-Maleic Acid Copolymers.Methods in molecular biology (Clifton, N.J.) · 2024Article
- Alternatives to Styrene- and Diisobutylene-Based Copolymers for Membrane Protein Solubilization via Nanodisc Formation.Angewandte Chemie (International ed. in English) · 2023Article
- Effect of Cholesterol on the Structure and Composition of Glyco-DIBMA Lipid Particles.Langmuir : the ACS journal of surfaces and colloids · 2023Article
- Protein Extraction and Purification by Differential Solubilization.Methods in molecular biology (Clifton, N.J.) · 2023Article
- Detergent-Free Isolation of Membrane Proteins and Strategies to Study Them in a Near-Native Membrane Environment.Biomolecules · 2022Review
- Mechanisms of Formation, Structure, and Dynamics of Lipoprotein Discs Stabilized by Amphiphilic Copolymers: A Comprehensive Review.Nanomaterials (Basel, Switzerland) · 2022Review
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Authors and funding
37 authors at 2 institutions in 1 country.
Funding
Abstract
Styrene maleic acid (SMA) polymers have proven to be very successful for the extraction of membrane proteins, forming SMA lipid particles (SMALPs), which maintain a lipid bilayer around the membrane protein. SMALP-encapsulated membrane proteins can be used for functional and structural studies. The SMALP approach allows retention of important protein-annular lipid interactions, exerts lateral pressure, and offers greater stability than traditional detergent solubilisation. However, SMA polymer does have some limitations, including a sensitivity to divalent cations and low pH, an absorbance spectrum that overlaps with many proteins, and possible restrictions on protein conformational change. Various modified polymers have been developed to try to overcome these challenges, but no clear solution has been found. A series of partially-esterified variants of SMA (SMA 2625, SMA 1440 and SMA 17352) has previously been shown to be highly effective for solubilisation of plant and cyanobacterial thylakoid membranes. It was hypothesised that the partial esterification of maleic acid groups would increase tolerance to divalent cations. Therefore, these partially-esterified polymers were tested for the solubilisation of lipids and membrane proteins, and their tolerance to magnesium ions. It was found that all partially esterified polymers were capable of solubilising and purifying a range of membrane proteins, but the yield of protein was lower with SMA 1440, and the degree of purity was lower for both SMA 1440 and SMA 17352. SMA 2625 performed comparably to SMA 2000. SMA 1440 also showed an increased sensitivity to divalent cations. Thus, it appears the interactions between SMA and divalent cations are more complex than proposed and require further investigation.
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