1. References

In enzymology, a L-3-cyanoalanine synthase ({{EC number|4.4.1.9}}) is an enzyme that catalyzes the chemical reaction

L-cysteine + hydrogen cyanide L-3-cyanoalanine + hydrogen sulfide

Thus, the two substrates of this enzyme are L-cysteine and hydrogen cyanide, whereas its two products are L-3-cyanoalanine and hydrogen sulfide.

This enzyme belongs to the family of lyases, specifically the class of carbon-sulfur lyases. The systematic name of this enzyme class is L-cysteine hydrogen-sulfide-lyase (adding hydrogen cyanide L-3-cyanoalanine-forming). Other names in common use include beta-cyanoalanine synthase, beta-cyanoalanine synthetase, beta-cyano-L-alanine synthase, and L-cysteine hydrogen-sulfide-lyase (adding HCN). This enzyme participates in cyanoamino acid metabolism.

References

• {{cite journal |vauthors=Akopyan TN, Braunstein AE, Goryachenkova EV | date = 1975 | title = Beta-cyanoalanine synthase: purification and characterization | journal = Proc. Natl. Acad. Sci. U.S.A. | volume = 72 | pages = 1617–21 | pmid = 1055433 | doi = 10.1073/pnas.72.4.1617 | issue = 4 | pmc = 432590 }}
• {{cite journal |vauthors=Castric PA, Conn EE |author-link2=Eric Conn | date = 1971 | title = Formation of -cyanoalanine by O-acetylserine sulfhydrylase | journal = J. Bacteriol. | volume = 108 | pages = 132–6 | pmid = 5001194 | issue = 1 | pmc = 247041 }}
• {{cite journal | author = Hendrickson HR | date = 1968 | title = The beta-cyanoalanine synthase of blue lupine | journal = Fed. Proc. | volume = 27 | pages = 593 }}
• {{cite journal |vauthors=Hendrickson HR, Conn EE | date = 1969 | title = Cyanide metabolism in higher plants. IV. Purification and properties of the beta-cyanolanine synthase of blue lupine | journal = J. Biol. Chem. | volume = 244 | pages = 2632–40 | pmid = 5769995 | issue = 10 }}

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