Miniature TnpB-based Genome Editing Tool

Recently, Indian researchers created a hypercompact genome-editing system using TnpB proteins, offering a homegrown alternative to proprietary CRISPR-Cas technologies.

What is the TnpB-based Genome Editing System?

Aspect	Details
Nature of TnpB	TnpB is a tiny, next-generation genome-editing enzyme that works like CRISPR but is far more compact.
Working Mechanism	It functions as a molecular scissor, cutting plant DNA at a precise target location guided by a matching RNA sequence.

Key Features and Advantages

Feature	Explanation
Hypercompact Size	TnpB has only 400–500 amino acids, compared with 1,000–1,400 in Cas9 and around 1,300 in Cas12a.
Easy Delivery	Its small size enables viral vector delivery directly into plant cells, reducing dependence on laborious tissue-culture-based transfer.
Indigenous & IP-Free	Since the system is patented by ICAR, Indian breeders can use it without paying licensing fees to foreign CRISPR patent holders.
Next-Generation Editing	Enables precise editing of genes already present within the plant, without introducing foreign DNA.
Efficient Gene Targeting	Uses guide RNA to navigate to the exact DNA address and modify genes linked with yield, drought tolerance, and disease resistance.

BACILLUS SUBTILIS: STATE MICROBE OF KERALA

Kerala has become the first Indian state to declare Bacillus subtilis as its official State Microbe.
Bacillus subtilis is a beneficial probiotic bacterium commonly found in soil, fermented foods, and the human gut.
It is widely studied for improving gut health, boosting immunity, enhancing soil fertility, and controlling plant diseases.

PT Facts

TnpB: Smaller than Cas9, making it easier to deliver into cells.
ICAR: Stands for Indian Council of Agricultural Research.
Genome Editing: Editing without foreign DNA helps develop improved crops with fewer regulatory concerns.
Bacillus subtilis: Beneficial in agriculture, probiotics, and biotechnology.

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