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Covalently Linked Protein Regulators

Covalently Linked Protein Regulators

Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
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Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
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Transfer RNA Synthesis

Transfer RNA Synthesis

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Phase II Reactions: Methylation Reactions

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Methylation is a phase II biotransformation process involving the attachment of a methyl group to a substrate. Enzymes known as methyltransferases orchestrate this reaction.
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Sequence-specific Labeling of Nucleic Acids and Proteins with Methyltransferases and Cofactor Analogues

Sequence-specific Labeling of Nucleic Acids and Proteins with Methyltransferases and Cofactor Analogues

Published on: November 22, 2014

Modifying Methionine on Proteins.

Li-Jun Xie^1,2, Li Liu^1,2, Liang Cheng^1,2

¹Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Laboratory of Molecular Recognition and Function, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.

Chembiochem : a European Journal of Chemical Biology

|October 15, 2019

Summary

This summary is machine-generated.

Methionine labeling offers precise protein control. This research highlights methods for selectively modifying methionine residues to precisely regulate protein function without disruption.

Keywords:

biorthogonal conjugations chemoselectivity methionine post-translational modification protein labeling

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Area of Science:

Biochemistry and Molecular Biology
Chemical Biology

Background:

Methionine is a key amino acid for protein labeling due to its unique chemical properties.
Selective modification of methionine residues is crucial for understanding and controlling protein function.
Current methods for methionine modification are limited in scope and application.

Purpose of the Study:

To review recent advancements in the selective post-transcriptional modification of methionine residues.
To highlight strategies for precise control over protein function through methionine modification.
To underscore the potential of methionine as a versatile target for chemical biology applications.

Main Methods:

Literature review of recent studies on methionine modification.
Analysis of techniques enabling selective methionine residue targeting.
Synthesis of findings on the functional consequences of methionine modifications.

Main Results:

Several novel chemical and enzymatic strategies allow for selective methionine modification.
These modifications enable precise control over protein activity, localization, and interactions.
The highlighted methods offer new avenues for studying protein dynamics and engineering protein functions.

Conclusions:

Selective methionine modification is a powerful tool for dissecting and manipulating protein functions.
Further exploration of methionine modification techniques will advance chemical biology and protein engineering.
Targeting methionine provides a versatile platform for developing novel protein-based therapeutics and diagnostics.