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{{Infobox enzyme
| Name = Methylenediurea deaminase
| EC_number = 3.5.3.21
| CAS_number = 205830-62-2
| IUBMB_EC_number = 3/5/3/21
| GO_code = 
| image = 
| width = 
| caption =
}}
'''Methylenediurea deaminase''' ({{EC number|3.5.3.21}}, ''methylenediurease'') is an [[enzyme]] with system name ''methylenediurea aminohydrolase''.<ref>{{cite journal | title = Purification and characterisation of an enzyme from a strain of Ochrobactrum anthro&pi; that degrades condensation products of urea and formaldehyde (ureaform) |author = Jahns, T., Schepp, R., Kaltwasser, H. |journal = Can. J. Microbiol. |date = 1997 |volume = 43 |pages = 1111-1117 |pmid = }}</ref> This enzyme [[catalysis|catalyses]] the following [[chemical reaction]]

: [[methylenediurea]] + 2 H<sub>2</sub>O <math>\rightleftharpoons</math> N-(hydroxymethyl)urea + 2 NH<sub>3</sub> + CO<sub>2</sub> (overall reaction)
: (1a) methylenediurea + H<sub>2</sub>O <math>\rightleftharpoons</math> N-(carboxyaminomethyl)urea + NH<sub>3</sub>
: (1b) N-(carboxyaminomethyl)urea <math>\rightleftharpoons</math> N-(aminomethyl)urea + CO<sub>2</sub> (spontaneous)
: (1c) N-(aminomethyl)urea + H<sub>2</sub>O <math>\rightleftharpoons</math> N-(hydroxymethyl)urea + NH<sub>3</sub> (spontaneous)

Methylenediurea is [[hydrolysed]] and [[decarboxylated]] to give an aminated methylurea.

== References ==
{{reflist}}

== External links ==
* {{MeshName|Methylenediurea+deaminase}}

[[Category:EC 3.5.3]]