Guide to Download, Analyse Gene Expression at NCBI GEO [PB Kale, Molecular Biology and Biotechnology, Mahatma Phule Krishi Vidyapeeth Rahuri]

 Steps and Guide to Download and Analyze Gene Expression Data from NCBI GEO 

PB Kale, Molecular Biology and Biotechnology, Mahatma Phule Krishi Vidyapeeth Rahuri

Protocol 1: To Download Datasets

1. Open Web Browser:

   - Launch your preferred web browser (e.g., Chrome, Firefox, Safari).

   - In the address bar, type in the URL: [https://www.ncbi.nlm.nih.gov/geo/](https://www.ncbi.nlm.nih.gov/geo/) and press Enter. This will direct you to the Gene Expression Omnibus (GEO) homepage, a public repository for gene expression data.

   

2. Search for Datasets:

   - On the GEO homepage, locate the search bar.

   - Enter the keyword(s) relevant to your research or the specific GEO accession number (a unique identifier for a dataset) into the search box.

   - Click the 'Search' button to initiate the search. The website will display a list of search results matching your query.

3. View Search Results:

   - Browse through the search results. Each result will typically include a brief description and a hyperlink.

Evolution of microRNAs [PB Kale, Molecular Biology and Biotechnology, Mahatma Phule Krishi Vidyapeeth Rahuri]

Important Theories of MicroRNA (miRNA) Evolution

(PB Kale, Molecular Biology and Biotechnology, Mahatma Phule Krishi Vidyapeeth,  Rahuri)

MicroRNAs (miRNAs) are small non-coding RNA molecules that play critical roles in regulating gene expression. Their evolution has been a topic of significant research and several theories have been proposed to explain how miRNAs have evolved. Here are some of the important theories:

AI-generated image 

1. **The Origination from Hairpin Structures:**

   - **Theory:** miRNAs likely originated from simple hairpin structures within the genome.

   - **Details:** These hairpin structures could have initially formed accidentally but later were co-opted by the organism for regulatory purposes due to their ability to bind to mRNA targets and inhibit their translation.

2. **Duplication and Divergence:**

Zinc modulat nitrogen fixation in legumes [PB Kale, Molecular Biology and Biotechnology, Mahatma Phule Krishi Vidyapeeth Rahuri]

 "How Zinc Helps Legumes Adapt to Their Environment"

PB Kale, Molecular Biology and Biotechnology, Mahatma Phule Krishi Vidyapeeth Rahuri

Schematic diagram of the screen that resulted in the identification of FUN. Mutants producing functionally pink nodules were watered with 10 mM KNO3. Most nodules on wild-type plants became green and senescent, whereas fun mutant plants maintained pink nodules even under high concentrations of nitrate.

 - Plants adapt to changing environmental conditions by adjusting their metabolism and gene expression to maintain fitness.