🧬 RNA to Protein Translator 🧬

🧠 Molecular Biology

📌 The Central Dogma: The Flow of Genetic Information

DNA → RNA → Protein

🧬 DNA is the blueprint, RNA carries messages, and proteins do the work.

🧪 DNA: Double-stranded, with bases A, T, G, C. Stores genetic info.

🧪 RNA: Single-stranded, with bases A, U, G, C. Carries instructions.

🧪 Protein: Made from amino acids. Performs cellular functions.

🔄 Transcription (DNA → RNA)

• 🔍 Initiation: RNA polymerase binds promoter.
• 🔁 Elongation: mRNA is synthesized.
• 🛑 Termination: Transcription ends, mRNA is released.

🧬 The Genetic Code

• 🔢 Triplet code: 3 nucleotides = 1 codon = 1 amino acid
• 🚀 Start Codon: AUG (Methionine)
• 🛑 Stop Codons: UAA, UAG, UGA
• 🔁 Redundant, non-overlapping, universal

📘 How Translation Works

🔁 Translation: mRNA to Protein

🧫 Translation is the process by which the genetic information in mRNA is used to synthesize a polypeptide chain (protein).

📍 Location: Ribosomes in the cytoplasm.

🧪 Key Players:

• 🧬 mRNA: Carries the genetic message.
• 🧬 tRNA: Brings specific amino acids.
• 🧬 Ribosomes: Machinery for protein synthesis.
• 🧱 Amino Acids: The building blocks of proteins.

🚀 Stages of Translation:

• Initiation: Small ribosomal subunit binds mRNA. Initiator tRNA binds to AUG. Large subunit joins → tRNA in P-site.
• Elongation: Codon recognition (A-site), peptide bond formation, translocation (A → P → E).
• Termination: Stop codon reaches A-site. Release factors cause polypeptide release. Ribosome disassembles.

🧬 Protein Folding and Function:

• Primary Structure: Sequence of amino acids.
• Secondary: Local folds (α-helices, β-sheets).
• Tertiary: 3D structure formed by side-chain interactions.
• Quaternary: (if applicable) Multiple subunits form a complete protein.

🛠️ How the Tool Works

• 🧪 Input Validation: Checks if the input RNA sequence contains only A, U, G, C.
• 🎯 Start Codon Recognition: Scans for the first AUG codon to mark the beginning.
• 📏 Reading Frame Establishment: Establishes the reading frame to interpret codons.
• 🔄 Codon-to-Amino Acid Mapping: Maps codons to amino acids using a genetic table.
• 🔗 Polypeptide Chain Assembly: Constructs a chain of amino acids.
• ⛔ Stop Codon Recognition: Stops upon encountering UAA, UAG, or UGA.
• ✅ Termination: Outputs the final amino acid sequence.

🧬 Example: Input RNA sequence: 5'- A U G G C A U C G U A A -3'

1. Find AUG: Methionine (Met)
2. Next Codon GCA: Alanine (Ala)
3. Next Codon UCG: Serine (Ser)
4. Next Codon UAA: Stop codon → Termination

Final Output: Met - Ala - Ser

📚 Codon Table