Mandelonitrile lyase
| mandelonitrile lyase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC no. | 4.1.2.10 | ||||||||
| CAS no. | 9024-43-5 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| Gene Ontology | AmiGO / QuickGO | ||||||||
| |||||||||
In enzymology, a mandelonitrile lyase (EC 4.1.2.10, (R)-HNL, (R)-oxynitrilase, (R)-hydroxynitrile lyase) is an enzyme that catalyzes the chemical reaction
- mandelonitrile hydrogen cyanide + benzaldehyde
Hence, this enzyme has one substrate, mandelonitrile, and two products, hydrogen cyanide and benzaldehyde.
This enzyme belongs to the family of lyases, specifically the aldehyde-lyases, which cleave carbon-carbon bonds. The systematic name of this enzyme class is mandelonitrile benzaldehyde-lyase (hydrogen cyanide-forming). Other names in common use include hydroxynitrile lyase, (R)-oxynitrilase, oxynitrilase, D-oxynitrilase, D-alpha-hydroxynitrile lyase, and mandelonitrile benzaldehyde-lyase. This enzyme participates in cyanoamino acid metabolism. It has 2 cofactors: flavin, and flavoprotein.
Structural studies
As of late 2007, only one structure has been solved for this class of enzymes, with the PDB accession code 1JU2.
References
- BECKER W, BENTHIN U, ESCHENHOF E, PFEIL E (1963). "[On the knowledge of cyanhydrin synthesis. II. Purification and properties of hydroxynitrilase from bitter almonds (Prunus communis Stokes)]". Biochem. Z. 337: 156–66. PMID 13970146.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - Becker W and Pfeil E (1964). "Die Darstellung kristallisierter Oxynitrilase aus bitteren Mandeln (Prunus comm. Stks)". Naturwissenschaften. 51 (8): 193. doi:10.1007/BF00600723.
- Gross M, Jacobs GH, Poulton JE (1982). "A rapid and sensitive spectrophotometric assay for prunasin hydrolase activity employing purified mandelonitrile lyase". Anal. Biochem. 119 (1): 25–30. doi:10.1016/0003-2697(82)90660-1. PMID 6803611.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - Xu LL, Singh BK, Conn EE (1986). "Purification and characterization of mandelonitrile lyase from Prunus lyonii". Arch. Biochem. Biophys. 250 (2): 322–8. doi:10.1016/0003-9861(86)90733-2. PMID 3777939.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - Yemm RS, Poulton JE (1986). "Isolation and characterization of multiple forms of mandelonitrile lyase from mature black cherry (Prunus serotina Ehrh.) seeds". Arch. Biochem. Biophys. 247 (2): 440–5. doi:10.1016/0003-9861(86)90604-1. PMID 3717954.