Editing Protease (section)

==== Peptide lyases ====
A seventh catalytic type of proteolytic enzymes, [[asparagine peptide lyase]], was described in 2011. Its proteolytic mechanism is unusual since, rather than [[hydrolysis]], it performs an [[elimination reaction]].<ref name=":0">{{cite journal | vauthors = Rawlings ND, Barrett AJ, Bateman A | title = Asparagine peptide lyases: a seventh catalytic type of proteolytic enzymes | journal = The Journal of Biological Chemistry | volume = 286 | issue = 44 | pages = 38321–38328 | date = November 2011 | pmid = 21832066 | pmc = 3207474 | doi = 10.1074/jbc.M111.260026 | doi-access = free }}</ref> During this reaction, the catalytic [[asparagine]] forms a cyclic chemical structure that cleaves itself at asparagine residues in proteins under the right conditions. Given its fundamentally different mechanism, its inclusion as a peptidase may be debatable.<ref name=":0"/>