Q: What is the best way to use your ABCG1 peptide (NB400-132PEP)?. For example, at what concentration should it be used, etc.?

A: This peptide is useful as a blocking peptide for NB400-132 specifically. In regards to concentration, you will need to add anywhere from 5-10 ug of peptide to every 1 ug of antibody for the blocking experiment. If you are not sure how much to use, we would recommend using a titer of at least two different dilutions so that you can visualize the amount of blocking that is occurring and you can optimize from there. Please see our general peptide competition/blocking protocol.

ABCG1 Antibody Blocking Peptide

Novus Biologicals | Catalog # NB400-132PEP

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Product Specifications
Preparation & Storage
Background
Product Documents
Specific Notices
Research Areas

Key Product Details

Applications

Antibody Competition

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Product Specifications

Description

A ABCG1 antibody blocking peptide.

Predicted Molecular Mass

75.59 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.

Application Notes

This peptide is useful as a blocking peptide for NB400-132.

For further blocking peptide related protocol, click here.

Specificity

This peptide is specific for NB400-132 only.

Protein / Peptide Type

Antibody Blocking Peptide

Formulation, Preparation, and Storage

NB400-132PEP

Formulation	Peptide dissolved in dH2O. Contains no BSA.
Preservative	No Preservative
Concentration	1.0 mg/ml
Shipping	The product is shipped with dry ice or equivalent. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage	Store at -80C. Avoid freeze-thaw cycles.

Background: ABCG1

ABCG1 (ATP-binding cassette sub-family G member 1) is a member of the ABC superfamily of transporters, specifically the ABCG (White) subfamily, that is characterized by their ABC domain organization (1). The ABC domains are around 180 amino acids (aa) in length and contain three conserved domains: Walker A motif (12 aa), Walker B motif (5 aa), and Signature motif (5 aa) (1, 2). Functional ABC transporters are comprised of two ABCs and two transmembrane domains (TMDs), where each TMD contains six TM alpha-helices (1-3). ABCG1 is considered a "half" transporter because it only has one ABC domain and one TMD (1-3). In order to be functional, ABCG1 and other half transporters can form homodimers or heterodimers (1-3). ABCG1 has a theoretical molecular weight of 102 kDa and is highly expressed in cells including macrophages, lymphocytes, and neurons (2). Additionally, ABCG1 is shown to be highly expressed in lung, kidney, brain, and spleen tissue (2). Specifically, ABCG1 is presented on the cell surface and in intracellular compartments of cholesterol-rich macrophages and, consequently, plays a crucial role in cholesterol regulation and homeostasis (3-5). ABCG1 is involved in the export, or efflux, of cholesterol and phospholipids from macrophages to high density lipoproteins (HDL) for eventual excretion via the liver.

A variety of cardiovascular and cardiometabolic diseases are associated with ABCG1 dysfunction (5-7). Macrophages can become cholesterol-containing foam cells that are generated by the uptake of low-density lipoproteins (LDL), cholesterol esterification, and compromised cholesterol efflux machinery in transporters like ABCG1 and ABCA1 (2, 5, 6, 7). Foam cells are associated with the chronic, inflammatory disease atherosclerosis which is characterized by arterial buildup of plaques that can ultimately lead to cardiovascular disease (5, 6, 7). Additionally, ABCG1 has a critical role in cardiometabolic disorders. Studies have found that diabetic mice have decreased ABCG1 expression (8). Furthermore, loss of ABCG1 in mouse pancreatic beta cells ultimately leads to impaired insulin secretion, suggesting that inhibition or modulation of ABCG1 may contribute to development of diabetes and obesity (8). Finally, other related ATP-binding cassette transporter family members, such as ABCA1 and ABCG5/8, have been associated with genetically-inherited syndromes like Tangier disease, characterized by reduced levels of HDL in the blood, and Sitosterolemia, characterized by elevated plant sterol lipid accumulation in blood and tissues (7)..

Alternate names for ABCG1 includes ABC transporter 8 (ABC8), ATP-binding cassette transporter, anti-, sub-family G (WHITE), homolog of Drosophila white, and MGC34313..

References

1. Tarling E. J. (2013). Expanding roles of ABCG1 and sterol transport. Current opinion in lipidology. https://doi.org/10.1097/MOL.0b013e32835da122.

2. Tarr, P. T., Tarling, E. J., Bojanic, D. D., Edwards, P. A., & Baldan, A. (2009). Emerging new paradigms for ABCG transporters. Biochimica et biophysica acta.https://doi.org/10.1016/j.bbalip.2009.01.007.

3. Tarling, E. J., & Edwards, P. A. (2011). ATP binding cassette transporter G1 (ABCG1) is an intracellular sterol transporter. Proceedings of the National Academy of Sciences of the United States of America. https://doi.org/10.1073/pnas.1113021108.

4. Phillips M. C. (2014). Molecular mechanisms of cellular cholesterol efflux. The Journal of biological chemistry, 289(35), 24020-24029. https://doi.org/10.1074/jbc.R114.583658.

5. Ouimet, M., Barrett, T. J., & Fisher, E. A. (2019). HDL and Reverse Cholesterol Transport. Circulation research. https://doi.org/10.1161/CIRCRESAHA.119.312617.

6. Yu, X. H., Fu, Y. C., Zhang, D. W., Yin, K., & Tang, C. K. (2013). Foam cells in atherosclerosis. Clinica chimica acta; international journal of clinical chemistry. https://doi.org/10.1016/j.cca.2013.06.006

Long Name

ATP-binding Cassette, Sub-family G (WHITE), Member 1

Alternate Names

ABC8, WHITE1, WHT1

Gene Symbol

ABCG1

Additional ABCG1 Products

Product Documents for ABCG1 Antibody Blocking Peptide

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Product Specific Notices for ABCG1 Antibody Blocking Peptide

This product is for research use only and is not approved for use in humans or in clinical diagnosis. This product is guaranteed for 1 year from date of receipt.

Related Research Areas

Metabolism

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