Open Access
REVIEW
Recent biomedical advances enabled by HaloTag technology
WEIYU CHEN1,2, MUHSIN H. YOUNIS3, ZHONGKUO ZHAO1,*, WEIBO CAI3,*
1 The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, 322000, China
2 International Institutes of Medicine, The Fourth Affiliated Hospital of Zhejiang University School of Medicine, Yiwu, 322000, China
3 Departments of Radiology and Medical Physics, University of Wisconsin—Madison, Madison, WI, 53705, USA
* Corresponding Authors: Zhongkuo Zhao, ; Weibo Cai,
BIOCELL 2022, 46(8), 1789-1801. https://doi.org/10.32604/biocell.2022.018197
Received 16 July 2021; Accepted 02 December 2021; Issue published 22 April 2022
Abstract
The knowledge of interactions among functional proteins helps researchers understand disease mechanisms
and design potential strategies for treatment. As a general approach, the fluorescent and affinity tags were employed
for exploring this field by labeling the Protein of Interest (POI). However, the autofluorescence and weak binding
strength significantly reduce the accuracy and specificity of these tags. Conversely, HaloTag, a novel self-labeling
enzyme (SLE) tag, could quickly form a covalent bond with its ligand, enabling fast and specific labeling of POI.
These desirable features greatly increase the accuracy and specificity, making the HaloTag a valuable system for
various applications ranging from imaging to immobilization of POI. Notably, the HaloTag technique has already
been successfully employed in a series of studies with excellent efficiency. In this review, we summarize the
development of HaloTag and recent advanced investigations associated with HaloTag, including in vitro imaging (e.g.,
POI imaging, cellular condition monitoring, microorganism imaging, system development), in vivo imaging,
biomolecule immobilization (e.g., POI collection, protein/nuclear acid interaction and protein structure analysis),
targeted degradation (e.g., L-AdPROM), and more. We also present a systematic discussion regarding the future
direction and challenges of the HaloTag technique.
Keywords
Cite This Article
CHEN, W., YOUNIS, M. H., ZHAO, Z., CAI, W. (2022). Recent biomedical advances enabled by HaloTag technology.
BIOCELL, 46(8), 1789–1801.