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  2. Lysine - Wikipedia

    en.wikipedia.org/wiki/Lysine

    Lysine (symbol Lys or K) [2] is an α-amino acid that is a precursor to many proteins.It contains an α-amino group (which is in the protonated −NH + 3 form when dissolved in water), an α-carboxylic acid group (which is in the deprotonated −COO − form when dissolved in water), and a side chain lysyl ((CH 2) 4 NH 2), classifying it as a basic, charged (at physiological pH), aliphatic ...

  3. Active site - Wikipedia

    en.wikipedia.org/wiki/Active_site

    The active site consists of amino acid residues that form temporary bonds with the substrate, the binding site, and residues that catalyse a reaction of that substrate, the catalytic site. Although the active site occupies only ~10–20% of the volume of an enzyme, [ 1 ] : 19 it is the most important part as it directly catalyzes the chemical ...

  4. Amino acid replacement - Wikipedia

    en.wikipedia.org/wiki/Amino_acid_replacement

    Amino acid replacement is a change from one amino acid to a different amino acid in a protein due to point mutation in the corresponding DNA sequence. It is caused by nonsynonymous missense mutation which changes the codon sequence to code other amino acid instead of the original. Notable mutations.

  5. Protein primary structure - Wikipedia

    en.wikipedia.org/wiki/Protein_primary_structure

    Protein primary structure is the linear sequence of amino acids in a peptide or protein. [ 1 ] By convention, the primary structure of a protein is reported starting from the amino -terminal (N) end to the carboxyl -terminal (C) end. Protein biosynthesis is most commonly performed by ribosomes in cells.

  6. α-Aminoadipate pathway - Wikipedia

    en.wikipedia.org/wiki/Α-aminoadipate_pathway

    The amino acid L-lysine The α-aminoadipate pathway is a biochemical pathway for the synthesis of the amino acid L - lysine . In the eukaryotes , this pathway is unique to several species of yeast , higher fungi (containing chitin in their cell walls), and the euglenids .

  7. Post-translational modification - Wikipedia

    en.wikipedia.org/wiki/Post-translational...

    In the vesicle, more parts are cut off, and it turns into mature insulin. In molecular biology, post-translational modification (PTM) is the covalent process of changing proteins following protein biosynthesis. PTMs may involve enzymes or occur spontaneously. Proteins are created by ribosomes, which translate mRNA into polypeptide chains, which ...

  8. Alpha helix - Wikipedia

    en.wikipedia.org/wiki/Alpha_helix

    The alpha helix is also commonly called a: Pauling–Corey–Branson α-helix (from the names of three scientists who described its structure); 3.6 13-helix because there are 3.6 amino acids in one ring, with 13 atoms being involved in the ring formed by the hydrogen bond (starting with amidic hydrogen and ending with carbonyl oxygen)

  9. Lysin - Wikipedia

    en.wikipedia.org/wiki/Lysin

    Finally, the recently discovered γ-d-glutaminyl-l-lysine endopeptidase lysins cleave the gamma bond between D-glutamine and L-lysine residues. As is the case for autolysins, early confusion around the cleavage specificity of these individual enzymes has led to some misattributions of the name "lysozyme" to proteins without this activity. [7]

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