RECOMBIN

biotechnical product for protection against viruses and viroids

Principle of action

Effect on the nucleic acids of the infectious agent

Main components

Nuclease + nucleosides (biotechnology)

Core principle of action

Effect of nuclease on the nucleic acids of the infectious agent

Direct action on nucleic acids

Yes - key component of the mechanism

"Recombin": composition and formulation

Developer and platform
The product's developer is a specialized organization that utilizes heterologostandardizationus expression technology followed by enzyme activity to deliver a stable commercial product.

Product composition
Active ingredient: recombinant nuclease complexed with nucleosides. This formulation combines an enzymatic degradation mechanism with a supportive synergistic effect.

Formulation and application
Formulation: water-soluble powder or concentrate, designed for convenient tank-mix preparation and seamless integration into standard spraying schedules.

Application rate per hectare
The application rate is 140 g per 1,000 L of working solution, which corresponds to 140 g/ha at an average spray volume of 1,000 L/ha.

"Recombin" action logic: problem — tool — result in plant protection against viroid infection

Problem: nucleic infection and its activation within the plant cell

Viroids and other phytopathogens of a nucleic nature disrupt normal plant processes, exploiting the host's cellular machinery to sustain themselves. In practice, this leads to reduced yields and a decline in crop health across both greenhouse and open-field environments. The primary goal of plant protection is to interrupt this virus-like infectious cycle.
Tool: Enzymatic degradation of nucleic acids by Recombin

Recombin combines a recombinant nuclease and nucleosides, creating a tool designed to targetedly attack the nucleic acids of phytopathogens. Its action logic centers on the ability to enzymatically destroy the infection's molecular basis directly within the plant cell context. This solution is engineered to lower the pathogen's functional activity at early stages.
Result: Disruption of viroid viability and containment of infection

Upon entering an infected system, the product renders the infectious material non-functional, limiting its further persistence and replication. As a result, the viroid infection loses its ability to progress effectively, creating the necessary conditions for the plant to stabilize its physiological processes. The core of this approach is to achieve a biological breakdown of the pathogen's viability.

Scientific rationale for the target

Vulnerability window
Maximum vulnerability occurs during the messenger RNA replication stage. If the template is destroyed before translation, viral protein synthesis and further genome copying become impossible.

Replication failure
For RNA viruses, it is the messenger RNA (mRNA) that triggers the infectious cycle. Its early cleavage breaks the cascade before new viral particles appear and systemic spread occurs.

Viroid target
In the case of the PSTVd viroid, the key target is its circular RNA rather than a protein structure. The lack of a protein coat makes this molecule highly accessible to exogenous nucleases.

Approach rationale
Consequently, choosing nucleic acid as the target is rooted in the very biology of the pathogen: destroying the genetic template eliminates subsequent assembly and replication.

Recombinant nuclease in Recombin: production technology and demonstrable product quality

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Enzymatic point of application: what exactly "works"

The recombinant nuclease in Recombin triggers the enzymatic degradation of phytopathogen nucleic acids. In the illustration, it is crucial to show that the active ingredient is specifically the protein enzyme component, which operates via a biochemical mechanism of recognition and cleavage.
Enzyme component manufacturing: from synthesis to purification

The technological chain begins with obtaining the recombinant nuclease, followed by the isolation and purification of the enzyme component to meet specified quality parameters. Visually, the steps "production → purification → preparation for control" are appropriate to emphasize the high-tech and manageable nature of the process.
Quality control: guaranteeing a stable effect

Quality control ensures reproducibility of action by evaluating the properties and stability of the enzyme, as well as its compliance with technological requirements. For Recombin’s operational logic, it is crucial to demonstrate that control is not the final step but a part of the management loop that confirms the enzyme's suitability for use in combination with nucleosides.
From laboratory workflow to farm efficiency

From a practical standpoint, growers see a direct link between technology and the final result in the field and greenhouse. Once the enzyme component is prepared and verified, the product maintains its effectiveness within the declared formulation, including its combination with nucleosides as part of the system.

The role of nucleosides in the composition of the drug

Protection of nuclease activity
Nucleosides act as mild inhibition acceptors: they support the active site of the nuclease and reduce the impact of nucleic acids on its self-accelerated inactivation during leaf treatment.

Enzyme inhibition
modified/excess nucleoside blocking RNA polymerase (the "chain terminator" principle or competitive inhibitor)

Antimetabolic effect
An excess of nucleosides creates antimetabolic pressure through competition for phosphorylation, which complicates de novo viral RNA synthesis.

Transport function
Nucleosides facilitate passage through the cuticular layer, increasing the probability of contact between the enzyme and the pathogen's nucleic acids.

Advantages of direct enzymatic action

Versatility
The drug acts on viral RNA and DNA, as well as on the circular RNA of viroids, meaning its spectrum of action is not limited to a single group of phytopathogens.

Speed
Catalytic hydrolysis begins immediately upon contact with the target and does not require waiting for a complex plant signaling response, unlike immunomodulating regimens.

Resistance to mutation
The absence of a selective target reduces the probability of the pathogen escaping through point mutations, which are typical for narrow-spectrum antiviral approaches.

Safety
The protein nature and complete biodegradability make the drug technologically convenient and compatible with the objectives of safe plant protection.

At an average working fluid application rate, this allows the hectare application rate to be precisely maintained without losing enzymatic activity.

140 g / 1000 l
corresponds to the hectare rate at an average working fluid application rate of 1,000 L/ha.

The mechanism of "Recombin" and practical implications for crop protection

Target in action: direct hydrolysis of nucleic acids

“Recombin” targets the direct enzymatic hydrolysis of phytopathogen nucleic acids. This approach renders the key biomolecules of the pathogen non-viable, ensuring the loss of its functional activity. This establishes a clear link between the molecular mechanism and the practical effect of crop protection.
Nucleosides enhance stability and penetration; block replication.

The formulation includes nucleosides that increase the stability of the active ingredients and support their penetration. This allows the drug to better maintain its efficacy during treatments and enables it to reach intracellular sites where nucleic acid degradation is initiated. Blocking viral replication provides a dual effect.
Reducing the risk of pathogen escape

An additional advantage is the lack of species specificity. This reduces the likelihood of the pathogen escaping the drug's action solely through point mutations. In crop protection practice, this is critical when operating under evolutionary pressure and the potential variability of pathogens.