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The 1993 film Jurassic Park (based on the 1990 Michael Crichton novel of the same name) features dinosaurs that were genetically altered so that they could not produce the amino acid lysine. [14] This was known as the "lysine contingency" and was supposed to prevent the cloned dinosaurs from surviving outside the park, forcing them to be ...
Lysine ball and stick model spinning. Lysine (symbol Lys or K) [2] is an α-amino acid that is a precursor to many proteins.Lysine contains an α-amino group (which is in the protonated −NH + 3 form when the lysine is dissolved in water at physiological pH), an α-carboxylic acid group (which is in the deprotonated −COO − form when the lysine is dissolved in water at physiological pH ...
D-lysine 5,6-aminomutase (5,6-LAM) is responsible for the first conversion in pathway B to convert D-α-lysine into 2,5-diaminohexanoate. Unlike other members of the family of aminomutases (like 2,3-LAM), which are peculiar to a single substrate, 5,6-LAM can reversibly catalyze both the reaction of D-lysine to 2,5-diaminohexanoic acid and the ...
The third number (the sub-subclass) gives more information about the catalytic mechanism of the reaction. Lysine carboxypeptidase is in sub-subclass 17: metallocarboxypeptidases. This subclass first defines lysine carboxypeptidase as an exopeptidase (sub-subclasses 11 and 13-19) which means that it only acts on terminal bonds of a polypeptide ...
LysE appears to catalyze unidirectional efflux of L-lysine (and other basic amino acids such as L-arginine), and it provides the sole route for L-lysine excretion. The energy source is believed to be the proton motive force (H + antiport). The E. coli ArgO homologue (TC# 2.A.75.1.2) effluxes arginine and possibly lysine and canavanine as well. [5]
Double-stranded DNA phage lysins tend to lie within the 25 to 40 kDa range in terms of size. A notable exception is the streptococcal PlyC endolysin, which is 114 kDa. PlyC is not only the biggest and most potent lysin, but also structurally unique since it is composed of two different gene products, PlyCA and PlyCB, with a ratio of eight PlyCB subunits for each PlyCA in its active conformation.
In enzymology, a lysine—tRNA ligase (EC 6.1.1.6) is an enzyme that catalyzes the chemical reaction. ATP + L-lysine + tRNALys AMP + diphosphate + L-lysyl-tRNALys. The 3 substrates of this enzyme are ATP, L-lysine, and tRNA(Lys), whereas its 3 products are AMP, diphosphate, and L-lysyl-tRNA(Lys).
Acetyllysine (or acetylated lysine) is an acetyl-derivative of the amino acid lysine. There are multiple forms of acetyllysine: this article is about N-ε-acetyl-L-lysine; another form is N-α-acetyl-L-lysine. In proteins, the acetylation of lysine residues is an important mechanism of epigenetics.