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{{Infobox enzyme
| Name = 2-Ketoarginine methyltransferase
| EC_number = 2.1.1.243
| CAS_number = 
| IUBMB_EC_number = 2/1/1/243
| GO_code = 
| image = 
| width = 
| caption =
}}
'''2-Ketoarginine methyltransferase''' ({{EC number|2.1.1.243}}, ''mrsA (gene)'') is an [[enzyme]] with system name ''S-adenosyl-L-methionine:5-carbamimidamido-2-oxopentanoate S-methyltransferase''.<ref>{{cite journal | title = Identification of the biosynthetic gene cluster for 3-methylarginine, a toxin produced by <em>Pseudomonas <em>syringae</em></em> pv. <em>syringae</em> 22d/93 |author = Braun, S.D., Hofmann, J., Wensing, A., Ullrich, M.S., Weingart, H., V&ouml;lksch, B. and Spiteller, D. |journal = Appl. Environ. Microbiol. |year = 2010 |volume = 76 |pages = 2500–2508 |pmid = 20190091}}</ref> This enzyme [[catalysis|catalyses]] the following [[chemical reaction]]

: [[S-adenosyl-L-methionine]] + [[5-guanidino-2-oxopentanoate]] <math>\rightleftharpoons</math> [[S-adenosyl-L-homocysteine]] + 5-guanidino-3-methyl-2-oxopentanoate

The enzyme is involved in production of the rare amino acid 3-methylarginine.

== References ==
{{reflist}}

== External links ==
* {{MeshName|2-ketoarginine+methyltransferase}}

[[Category:EC 2.1.1]]