Queuosine biosynthesis protein (QueC), also known as 7-cyano-7-deazaguanine synthase, catalyzes the ATP-dependent conversion of 7-carboxy-7-deazaguanine (CDG) to 7-cyano-7-deazaguanine (preQ0) [PMID: 16199558, PMID: 19354300, PMID: 18491386].
Gaur R, Varshney U.
Genetic analysis identifies a function for the queC (ybaX) gene product at an initial step in the queuosine biosynthetic pathway in Escherichia coli. J. Bacteriol. 187 6893-901 2005
McCarty RM, Somogyi A, Lin G, Jacobsen NE, Bandarian V.
The deazapurine biosynthetic pathway revealed: in vitro enzymatic synthesis of PreQ(0) from guanosine 5'-triphosphate in four steps. Biochemistry 48 3847-52 2009
Cicmil N, Huang RH.
Crystal structure of QueC from Bacillus subtilis: an enzyme involved in preQ1 biosynthesis. Proteins 72 1084-8 2008
Signatures from InterPro member databases are used to construct an entry.