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Lysine biosynthesis enzyme LysX The family of proteins found in this equivalog include the characterized LysX from Thermus thermophilus, which is part of a well-organized lysine biosynthesis gene cluster. LysX is believed to carry out an ATP-dependent acylation of the amino group of alpha-aminoadipate in the prokaryotic version of the fungal AAA lysine biosynthesis pathway. No species having a sequence in this equivalog contains the elements of the more common diaminopimelate lysine biosythesis pathway, and none has been shown to be a lysine auxotroph. These sequences have mainly recieved the name of the related enzyme, "ribosomal protein S6 modification protein RimK". RimK has been characterized in E. coli, and acts by ATP-dependent condensation of S6 with glutamate residues.
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Jiyao W et al.(2023). "The conserved domain database in 2023.",