TY - JOUR
T1 - Purification and properties of cyanide hydratase from Fusarium lateritium and analysis of the corresponding chy1 gene
AU - Cluness, M. J.
AU - Turner, P. D.
AU - Clements, E.
AU - Brown, D. T.
AU - O'Reilly, C.
PY - 1993
Y1 - 1993
N2 - The filamentous fungus Fusarium lateritium is cyanide tolerant, due, at least in part, to the induction by cyanide of the enzyme formamide hydrolyase (EC 4.2.1.66). This enzyme, more commonly known as cyanide hydratase, catalyses the hydration of cyanide to formamide. The enzyme was purified from F. lateritium and showed a subunit molecular mass of 43 kDa (as judged by SDS-PAGE), while the native protein appeared to form aggregates of up to 1217 kDa (as judged by gel-filtration and non-denaturing PAGE). mRNA samples from cultures grown with and without cyanide were in vitro translated and immunoprecipitated. This demonstrated that, in this species, the gene encoding the enzyme designated chy1, is cyanide inducible. Differential screening was used to isolate a cyanide hydratase cDNA clone which was subsequently used to obtain the corresponding genomic clone. A fragment of the cDNA clone encoding all but the first seven amino acids of the protein was expressed in E. coli using the expression vector pGEX-2T. Features of F. lateritium cyanide hydratase together with an analysis of the nucleotide sequence encoding this enzyme are presented.
AB - The filamentous fungus Fusarium lateritium is cyanide tolerant, due, at least in part, to the induction by cyanide of the enzyme formamide hydrolyase (EC 4.2.1.66). This enzyme, more commonly known as cyanide hydratase, catalyses the hydration of cyanide to formamide. The enzyme was purified from F. lateritium and showed a subunit molecular mass of 43 kDa (as judged by SDS-PAGE), while the native protein appeared to form aggregates of up to 1217 kDa (as judged by gel-filtration and non-denaturing PAGE). mRNA samples from cultures grown with and without cyanide were in vitro translated and immunoprecipitated. This demonstrated that, in this species, the gene encoding the enzyme designated chy1, is cyanide inducible. Differential screening was used to isolate a cyanide hydratase cDNA clone which was subsequently used to obtain the corresponding genomic clone. A fragment of the cDNA clone encoding all but the first seven amino acids of the protein was expressed in E. coli using the expression vector pGEX-2T. Features of F. lateritium cyanide hydratase together with an analysis of the nucleotide sequence encoding this enzyme are presented.
UR - http://www.scopus.com/inward/record.url?scp=0027267892&partnerID=8YFLogxK
U2 - 10.1099/00221287-139-8-1807
DO - 10.1099/00221287-139-8-1807
M3 - Article
C2 - 8409923
AN - SCOPUS:0027267892
VL - 139
SP - 1807
EP - 1815
JO - Journal of General Microbiology
JF - Journal of General Microbiology
SN - 0022-1287
IS - 8
ER -