Clip-tag
Clip-tag - Related Videos
02:57
DNA Extraction from Tail Clip: A Method Used in Zebrafish Genotyping
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2023
This article describes DNA extraction from zebrafish tail clip. The protocol demonstrates a rapid and efficient method to analyze zebrafish genotypes.
12:24
PAR-CliP - A Method to Identify Transcriptome-wide the Binding Sites of RNA Binding Proteins
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Cited by 267 •
2010
RNA transcripts are subject to extensive posttranscriptional regulation that is mediated by a multitude of trans-acting RNA-binding proteins (RBPs). Here we present a generalizable method to identify precisely and on a transcriptome-wide scale the RNA binding sites of RBPs.
18:50
Microsurgical Clip Obliteration of Middle Cerebral Aneurysm Using Intraoperative Flow Assessment
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Cited by 3 •
2009
Description of the surgical obliteration of a cerebral aneurysm utilizing an ultrasonic flow probe to assess arterial flow prior to and after aneurysm clip placement.
05:16
Sleeve Gastrectomy in Mice using Surgical Clips
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Cited by 2 •
2020
The prevalence of diabetes and obesity is continuously increasing worldwide. The mechanisms between diabetes, obesity and their associated mortality and co-morbidities need to be further investigated. Here, we present a protocol for sleeve gastrectomy (SG) in animals as an uncomplicated preclinical model of bariatric surgery.
11:26
High-throughput Gene Tagging in Trypanosoma brucei
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Cited by 21 •
2016
Addition of a tag to a protein is a powerful way of gaining insight into its function. Here, we describe a protocol to endogenously tag hundreds of Trypanosoma brucei proteins in parallel such that genome scale tagging is achievable.
FAQs
The engineered human O6-alkylguanine-DNA alkyltransferase in Clip-tag reacts with a benzylcytosine-linked fluorescent substrate. During this reaction, the fluorescent label is transferred to the tagged protein through a covalent bond rather than remaining loosely associated. This chemistry produces a stable signal that remains attached during imaging, supporting reliable observation of protein position and movement in living cells.
Benzylcytosine-linked substrates provide the chemical handle recognized by the engineered alkyltransferase component. Their fluorescent cargo determines which optical label becomes attached to the tagged protein, so different fluorophores can be used for distinct imaging requirements. This flexibility allows investigators to select labeling signals while preserving the selective reaction between the tag and its substrate.
Clip-tag and SNAP-tag can be used as orthogonal labeling systems, meaning each tag is paired with its corresponding substrate chemistry. In a cell containing proteins marked with the two tags, researchers can apply compatible fluorescent labels to distinguish their signals. This arrangement enables simultaneous observation of multiple proteins and comparison of their localization or trafficking dynamics.
Researchers first use the genetically encoded tag on the protein of interest, then provide a benzylcytosine-linked fluorescent substrate for the engineered alkyltransferase reaction. Selective covalent labeling attaches the fluorophore to that protein, after which its signal can be followed in living cells. The workflow supports direct visualization without relying on a transient, noncovalent association.
Pulse-chase experiments use the tag's selective labeling and stable covalent attachment to distinguish protein populations marked at different stages. A fluorescent labeling pulse marks the protein, and subsequent observation follows the labeled population over time. This approach helps reveal temporal changes in protein localization or trafficking, providing information about how labeled molecules move through living cells.
Clip-tag supports studies of protein localization, intracellular trafficking, and dynamic behavior in living cells. Because researchers can choose fluorescent substrates and follow a stable signal, they can examine where a protein is found and how its distribution changes over time. In combination with another orthogonal tag, the method also supports comparative analysis of multiple proteins in the same biological system.