Toolkit/TRIM21 RING domain

TRIM21 RING domain

Protein Domain·Research·Since 2020

Taxonomy: Mechanism Branch / Component. Workflows sit above the mechanism and technique branches rather than replacing them.

Summary

The TRIM21 RING domain is a catalytic protein domain whose ubiquitination activity is activated by substrate-induced clustering that promotes intermolecular RING dimerization. In the cited 2020 study, this activation mechanism underlies TRIM21-dependent antiviral responses and Trim-Away-mediated protein degradation.

Usefulness & Problems

Why this is useful

This domain is useful as a regulated ubiquitination module for targeted degradation contexts in which clustering can be coupled to substrate recognition. The cited work specifically links its activation logic to antiviral defense and to Trim-Away applications for degrading proteins and pathogens.

Source:

Here we show that a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21 and induce an antiviral response or drive Trim-Away.

Source:

We harness this mechanism to expand the Trim-Away toolbox with highly-active TRIM21-nanobody chimeras that can also be controlled optogenetically.

Problem solved

It addresses the problem of how TRIM21 ubiquitination activity is switched on in cells rather than remaining constitutively active. The study further indicates that understanding this activation mechanism is relevant to targeted protein degradation technologies.

Source:

Here we show that a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21 and induce an antiviral response or drive Trim-Away.

Published Workflows

FLASH-AWAY: Intrabody-Directed Targeting of Optogenetic Tools for Protein Degradation.

2025

Objective: Develop a light-inducible, intrabody-directed system for targeted degradation of selected intracellular proteins.

Why it works: The abstract states that Flash-Away combines a light-responsive degradation effector module based on the TRIM21 RING domain with specific intrabodies for precise targeting, so blue light can trigger degradation of chosen proteins.

light-responsive ubiquitination via the TRIM21 RING domainintrabody-mediated target recognitionoptogenetic controlintrabody-directed targeting

Taxonomy & Function

Primary hierarchy

Mechanism Branch

Component: A low-level protein part used inside a larger architecture that realizes a mechanism.

Techniques

No technique tags yet.

Target processes

degradation

Implementation Constraints

The available evidence supports use cases in which substrate-induced clustering is engineered or induced to activate the TRIM21 RING domain. Domain fusion and optogenetic control are listed as known techniques, but the provided evidence does not specify construct architectures, cofactors, expression systems, or illumination parameters.

The supplied evidence is limited to a single 2020 source and does not provide quantitative performance metrics, substrate scope, or comparative benchmarking against other degradation modules. Practical constraints such as cell-type dependence, delivery format, and off-target effects are not described in the provided evidence.

Validation

Cell-freeBacteriaMammalianMouseHumanTherapeuticIndep. Replication

Supporting Sources

Ranked Claims

Claim 1applicationsupports2020Source 1needs review

Substrate-induced clustering of TRIM21 can induce an antiviral response or drive Trim-Away.

Here we show that a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21 and induce an antiviral response or drive Trim-Away.
Claim 2applicationsupports2020Source 1needs review

Substrate-induced clustering of TRIM21 can induce an antiviral response or drive Trim-Away.

Here we show that a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21 and induce an antiviral response or drive Trim-Away.
Claim 3applicationsupports2020Source 1needs review

Substrate-induced clustering of TRIM21 can induce an antiviral response or drive Trim-Away.

Here we show that a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21 and induce an antiviral response or drive Trim-Away.
Claim 4applicationsupports2020Source 1needs review

Substrate-induced clustering of TRIM21 can induce an antiviral response or drive Trim-Away.

Here we show that a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21 and induce an antiviral response or drive Trim-Away.
Claim 5applicationsupports2020Source 1needs review

Substrate-induced clustering of TRIM21 can induce an antiviral response or drive Trim-Away.

Here we show that a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21 and induce an antiviral response or drive Trim-Away.
Claim 6applicationsupports2020Source 1needs review

Substrate-induced clustering of TRIM21 can induce an antiviral response or drive Trim-Away.

Here we show that a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21 and induce an antiviral response or drive Trim-Away.
Claim 7applicationsupports2020Source 1needs review

Substrate-induced clustering of TRIM21 can induce an antiviral response or drive Trim-Away.

Here we show that a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21 and induce an antiviral response or drive Trim-Away.
Claim 8general mechanistic implicationsupports2020Source 1needs review

This work provides a mechanism for cellular activation of TRIM RING ligases and has implications for targeted protein degradation technologies.

This work provides a mechanism for cellular activation of TRIM RING ligases and has important implications for targeted protein degradation technologies.
Claim 9general mechanistic implicationsupports2020Source 1needs review

This work provides a mechanism for cellular activation of TRIM RING ligases and has implications for targeted protein degradation technologies.

This work provides a mechanism for cellular activation of TRIM RING ligases and has important implications for targeted protein degradation technologies.
Claim 10general mechanistic implicationsupports2020Source 1needs review

This work provides a mechanism for cellular activation of TRIM RING ligases and has implications for targeted protein degradation technologies.

This work provides a mechanism for cellular activation of TRIM RING ligases and has important implications for targeted protein degradation technologies.
Claim 11general mechanistic implicationsupports2020Source 1needs review

This work provides a mechanism for cellular activation of TRIM RING ligases and has implications for targeted protein degradation technologies.

This work provides a mechanism for cellular activation of TRIM RING ligases and has important implications for targeted protein degradation technologies.
Claim 12general mechanistic implicationsupports2020Source 1needs review

This work provides a mechanism for cellular activation of TRIM RING ligases and has implications for targeted protein degradation technologies.

This work provides a mechanism for cellular activation of TRIM RING ligases and has important implications for targeted protein degradation technologies.
Claim 13general mechanistic implicationsupports2020Source 1needs review

This work provides a mechanism for cellular activation of TRIM RING ligases and has implications for targeted protein degradation technologies.

This work provides a mechanism for cellular activation of TRIM RING ligases and has important implications for targeted protein degradation technologies.
Claim 14general mechanistic implicationsupports2020Source 1needs review

This work provides a mechanism for cellular activation of TRIM RING ligases and has implications for targeted protein degradation technologies.

This work provides a mechanism for cellular activation of TRIM RING ligases and has important implications for targeted protein degradation technologies.
Claim 15mechanismsupports2020Source 1needs review

Substrate-induced clustering triggers intermolecular dimerization of the TRIM21 RING domain and activates TRIM21 ubiquitination activity.

Here we show that a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21
Claim 16mechanismsupports2020Source 1needs review

Substrate-induced clustering triggers intermolecular dimerization of the TRIM21 RING domain and activates TRIM21 ubiquitination activity.

Here we show that a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21
Claim 17mechanismsupports2020Source 1needs review

Substrate-induced clustering triggers intermolecular dimerization of the TRIM21 RING domain and activates TRIM21 ubiquitination activity.

Here we show that a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21
Claim 18mechanismsupports2020Source 1needs review

Substrate-induced clustering triggers intermolecular dimerization of the TRIM21 RING domain and activates TRIM21 ubiquitination activity.

Here we show that a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21
Claim 19mechanismsupports2020Source 1needs review

Substrate-induced clustering triggers intermolecular dimerization of the TRIM21 RING domain and activates TRIM21 ubiquitination activity.

Here we show that a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21
Claim 20mechanismsupports2020Source 1needs review

Substrate-induced clustering triggers intermolecular dimerization of the TRIM21 RING domain and activates TRIM21 ubiquitination activity.

Here we show that a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21
Claim 21mechanismsupports2020Source 1needs review

Substrate-induced clustering triggers intermolecular dimerization of the TRIM21 RING domain and activates TRIM21 ubiquitination activity.

Here we show that a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21
Claim 22tool expansionsupports2020Source 1needs review

The authors expanded the Trim-Away toolbox with highly active TRIM21-nanobody chimeras that can be controlled optogenetically.

We harness this mechanism to expand the Trim-Away toolbox with highly-active TRIM21-nanobody chimeras that can also be controlled optogenetically.
Claim 23tool expansionsupports2020Source 1needs review

The authors expanded the Trim-Away toolbox with highly active TRIM21-nanobody chimeras that can be controlled optogenetically.

We harness this mechanism to expand the Trim-Away toolbox with highly-active TRIM21-nanobody chimeras that can also be controlled optogenetically.
Claim 24tool expansionsupports2020Source 1needs review

The authors expanded the Trim-Away toolbox with highly active TRIM21-nanobody chimeras that can be controlled optogenetically.

We harness this mechanism to expand the Trim-Away toolbox with highly-active TRIM21-nanobody chimeras that can also be controlled optogenetically.
Claim 25tool expansionsupports2020Source 1needs review

The authors expanded the Trim-Away toolbox with highly active TRIM21-nanobody chimeras that can be controlled optogenetically.

We harness this mechanism to expand the Trim-Away toolbox with highly-active TRIM21-nanobody chimeras that can also be controlled optogenetically.
Claim 26tool expansionsupports2020Source 1needs review

The authors expanded the Trim-Away toolbox with highly active TRIM21-nanobody chimeras that can be controlled optogenetically.

We harness this mechanism to expand the Trim-Away toolbox with highly-active TRIM21-nanobody chimeras that can also be controlled optogenetically.
Claim 27tool expansionsupports2020Source 1needs review

The authors expanded the Trim-Away toolbox with highly active TRIM21-nanobody chimeras that can be controlled optogenetically.

We harness this mechanism to expand the Trim-Away toolbox with highly-active TRIM21-nanobody chimeras that can also be controlled optogenetically.
Claim 28tool expansionsupports2020Source 1needs review

The authors expanded the Trim-Away toolbox with highly active TRIM21-nanobody chimeras that can be controlled optogenetically.

We harness this mechanism to expand the Trim-Away toolbox with highly-active TRIM21-nanobody chimeras that can also be controlled optogenetically.

Approval Evidence

1 source3 linked approval claimsfirst-pass slug trim21-ring-domain
a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21

Source:

applicationsupports

Substrate-induced clustering of TRIM21 can induce an antiviral response or drive Trim-Away.

Here we show that a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21 and induce an antiviral response or drive Trim-Away.

Source:

general mechanistic implicationsupports

This work provides a mechanism for cellular activation of TRIM RING ligases and has implications for targeted protein degradation technologies.

This work provides a mechanism for cellular activation of TRIM RING ligases and has important implications for targeted protein degradation technologies.

Source:

mechanismsupports

Substrate-induced clustering triggers intermolecular dimerization of the TRIM21 RING domain and activates TRIM21 ubiquitination activity.

Here we show that a mechanism of substrate-induced clustering triggers intermolecular dimerization of the RING domain to switch on the ubiquitination activity of TRIM21

Source:

Comparisons

Source-backed strengths

The key strength supported by the evidence is a defined activation mechanism: substrate-induced clustering drives intermolecular dimerization of the TRIM21 RING domain and thereby activates ubiquitination. The same study connects this mechanism to functional outcomes in both antiviral response and Trim-Away.

Ranked Citations

  1. 1.
    StructuralSource 12020Claim 1Claim 2Claim 3

    Extracted from this source document.