SR-BI (scavenger receptor class B member 1, SCARB1) belongs to the CD36 family and acts as a cell surface lipoprotein receptor for a variety of ligands including high density lipoprotein (HDL), phospholipids, phosphatidylserine, and lipoproteins such as lipopolysaccharide (LPS). SR-BI mediates selective uptake of HDL cholesteryl (HDL-C) ester in the liver, steroidogenic tissues, and adipose tissue and facilitates the flux of free and esterified cholesterol between the cell surface and apoB-containing lipoproteins and modified lipoproteins. SR-BI plays a role in antigen capture and cross-presentation from bacteria, parasites, and viruses such as Hepatitis C. In endothelial cells and macrophages, SR-BI is involved in anti-inflammatory and pro-survival signaling, providing protection against atherosclerosis and clearing apoptotic cells (efferocytosis) (1, 2).

At least 5 different human splice variants have been identified with theoretical molecular weights ranging from 60.9 kDa for the canonical sequence to 45 kDa for an N-terminally truncated variant (SR-BII) (3). The extracellular domain of human SR-BI (CLA-1) shares 80%, 80%, 89%, 86% and 84% aa sequence identity with mouse, rat, porcine, rabbit, and bovine SR-BI, respectively. SR-BI is highly glycosylated and removal of N-linked glycosylation reduces lipid transport.

References

1. Linton MF, Tao H, Linton EF, Yancey PG. (2017) SR-BI: A Multifunctional Receptor in Cholesterol Homeostasis and Atherosclerosis. Trends Endocrinol Metab. 28(6):461-472. PMID: 28259375

2. Hoekstra M, Sorci-Thomas M. (2017) Rediscovering scavenger receptor type BI: surprising new roles for the HDL receptor. Curr Opin Lipidol. 28(3):255-260. PMID: 28301373

3. Shen WJ, Asthana S, Kraemer FB, Azhar S. (2018) Scavenger receptor B type 1: expression, molecular regulation, and cholesterol transport function.

Long Name

Scavenger Receptor Class B, Member I

Alternate Names

CD36L1, CLA1, HDLQTL6, SCARB1, SR-B1, SRBI

Gene Symbol

SCARB1

Additional SR-BI Products

Product Documents for SR-BI Antibody [Janelia Fluor® 525]

Product Datasheets

Download Product Datasheets

COA

SDS

Download SDS

Product Specific Notices for SR-BI Antibody [Janelia Fluor® 525]

Sold under license from the Howard Hughes Medical Institute, Janelia Research Campus.

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

Citations
Reviews

SR-BI Antibody [Janelia Fluor® 525]

Novus Biologicals, part of Bio-Techne | Catalog # NBP2-99690JF525

Key Product Details

Species Reactivity

Validated:

Applications

Label

Antibody Source

Concentration

View all SR-BI Antibodies »

Product Summary for SR-BI Antibody [Janelia Fluor® 525]

Immunogen

Clonality

Host

Isotype

Applications for SR-BI Antibody [Janelia Fluor® 525]

Immunocytochemistry/ Immunofluorescence

Immunoprecipitation

Western Blot

Formulation, Preparation, and Storage

Purification

Formulation

Preservative

Concentration

Shipping

Stability & Storage

Background: SR-BI