Tetraspanin

Updated: 2026-09-15

Overview

Tetraspanins are a family of membrane proteins found in eukaryotic cells, characterized by their four transmembrane domains. They are involved in various cellular processes, including cell adhesion, motility, and signaling. These proteins are known to form tetraspanin-enriched microdomains (TEMs) on the cell surface, which facilitate interactions with other proteins and lipids. Tetraspanins play a critical role in immune responses, cancer progression, and viral infections. Their ability to modulate cell behavior makes them a focus of biomedical research, particularly in understanding disease mechanisms and developing therapeutic targets.

Key Features

Tetraspanins are distinguished by their four transmembrane domains, which create a compact structure. This unique architecture allows them to interact with a wide range of partner proteins, including integrins, immunoglobulins, and growth factor receptors. These interactions are essential for their role in organizing membrane microdomains. Another key feature is their involvement in cell signaling pathways. Tetraspanins can influence cell proliferation, migration, and differentiation, making them important in both normal physiology and disease states. Their expression patterns vary across tissues, highlighting their diverse functional roles.

Application Areas

Tetraspanins are widely studied in biomedical research, particularly in cancer biology. Their role in tumor progression and metastasis has made them potential targets for anticancer therapies. For example, CD151, a tetraspanin, is associated with poor prognosis in several cancers. In immunology, tetraspanins like CD81 and CD37 are involved in immune cell activation and antigen presentation. They are also studied in virology, as some viruses exploit tetraspanins for cell entry. For instance, hepatitis C virus uses CD81 as a receptor for infecting liver cells.

Precautions

When working with tetraspanins in laboratory settings, it is important to use specific antibodies and validated reagents to ensure accurate detection and analysis. Cross-reactivity with other proteins can lead to false results. Storage conditions for tetraspanin-related reagents, such as antibodies or recombinant proteins, should follow manufacturer guidelines to maintain stability. Proper handling and disposal procedures are essential to ensure safety and reproducibility in experiments.

B2B Procurement Guide

For B2B procurement of tetraspanin-related products, consider suppliers specializing in biomedical research reagents. Key factors include product specificity, compatibility with intended applications (e.g., Western blot, immunofluorescence), and batch-to-batch consistency. Pricing varies depending on the product type (e.g., antibodies, recombinant proteins) and supplier. Bulk purchases may offer cost savings, but ensure quality control measures are in place. Reputable suppliers often provide technical support and validation data, which can be crucial for research accuracy.