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Related Experiment Video

Updated: Jul 24, 2026

mRNA Interactome Capture from Plant Protoplasts

mRNA Interactome Capture from Plant Protoplasts

Published on: July 28, 2017

[Ribosome-inactivating lectins from plants].

Iu V Kozlov, O Iu Sudarkina, A G Kurmanova

Molekuliarnaia Biologiia

|August 18, 2006

Summary

Plant proteins can inactivate ribosomes by damaging ribosomal RNA. Some toxic proteins like ricin and abrin are heterodimers, with potential medical applications.

Area of Science:

Biochemistry
Molecular Biology
Toxicology

Context:

A diverse group of plant proteins possess the ability to enzymatically inactivate ribosomes.
This inactivation occurs through the depurination of a specific adenine base within the 28S ribosomal RNA.
Certain highly toxic proteins, including ricin and abrin, belong to a specific subclass of these ribosome-inactivating proteins.

Purpose:

This review aims to explore the structural characteristics of heterodimeric plant ribosome-inactivating proteins.
It will elucidate their mechanism of action on ribosomes.
The review will also cover their biosynthesis, intracellular transport, and potential therapeutic applications in medicine.

Summary:

Heterodimeric plant ribosome-inactivating proteins (RIPs) are composed of a lectin subunit linked via a disulfide bond to an enzymatic subunit.

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These proteins function by cleaving a specific adenine residue in the 28S ribosomal RNA, thereby inhibiting protein synthesis.

The review details the structure-function relationship, biogenesis, and cellular trafficking of these potent molecules.

Impact:

Understanding the structure and function of these plant toxins can lead to novel therapeutic strategies.
Potential applications in medicine include targeted drug delivery and cancer therapy.
Further research into biosynthesis and trafficking may reveal new insights into protein engineering and cellular processes.