Protein Synthesis Explained with Simple Animations

Inside the nucleus, DNA carries the genetic instructions for making proteins.During transcription, the DNA double helix unwinds, exposing the template strand.RNA polymerase attaches to the template strand and begins reading the DNA sequence.As RNA polymerase moves along the template strand, it adds complementary RNA nucleotides following specific base pairing rules.The newly formed messenger RNA is modified with a five prime cap and a poly A tail.Finally, the completed messenger RNA molecule exits the nucleus through nuclear pores.The ribosome consists of two subunits that work together to read the mRNA.These subunits come together around the messenger RNA to form the complete ribosome.Transfer RNA, or tRNA, has a distinctive cloverleaf shape with an anticodon region that matches specific codons on the mRNA.The ribosome has three important sites: the A site for incoming tRNA, the P site where peptide bonds form, and the E site where tRNA exits.As protein synthesis proceeds, tRNA molecules move through these sites in a precise sequence.The matching between codons on the mRNA and anticodons on the tRNA must be precise for correct amino acid selection.This precise matching ensures that the correct amino acids are brought together for protein synthesis.At the ribosome's active site, amino acids are brought together to form peptide bonds.A peptide bond forms between the carboxyl group of one amino acid and the amino group of another.As the polypeptide chain grows longer, it begins to fold into its secondary structure, such as an alpha helix.The protein continues to fold into its tertiary structure, which is crucial for its function.Finally, the completed protein is released from the ribosome.The properly folded protein can now perform its specific function in the cell.