Abstract:
:The isocitrate lyase-encoding gene AgICL1 from the filamentous hemiascomycete Ashbya gossypii was isolated by heterologous complementation of a Saccharomyces cerevisiae icl1d mutant. The open reading frame of 1680 bp encoded a protein of 560 amino acids with a calculated molecular weight of 62584. Disruption of the AgICL1 gene led to complete loss of AgIcl1p activity and inability to grow on oleic acid as sole carbon source. Compartmentation of AgIcl1p in peroxisomes was demonstrated both by Percoll density gradient centrifugation and by immunogold labeling of ultrathin sections using specific antibodies. This fitted with the peroxisomal targeting signal AKL predicted from the C-terminal DNA sequence. Northern blot analysis with mycelium grown on different carbon sources as well as AgICL1 promoter replacement with the constitutive AgTEF promoter revealed a regulation at the transcriptional level. AgICL1 was subject to glucose repression, derepressed by glycerol, partially induced by the C2 compounds ethanol and acetate, and fully induced by soybean oil.
journal_name
FEBS Lettjournal_title
FEBS lettersauthors
Maeting I,Schmidt G,Sahm H,Revuelta JL,Stierhof YD,Stahmann KPdoi
10.1016/s0014-5793(99)00017-4keywords:
subject
Has Abstractpub_date
1999-02-05 00:00:00pages
15-21issue
1eissn
0014-5793issn
1873-3468pii
S0014-5793(99)00017-4journal_volume
444pub_type
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