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Role of phospholipase C and protein kinase C in Aspergillus nidulans during growth on pectin or glucose: Effects on germination and duplication cycle

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Abstract

The effects of PLC and Pkc inhibitors on Aspergillus nidulans depend on the carbon source. PLC inhibitors Spm and C48/80 delayed the first nuclear division in cultures growing on glucose, but stimulated it in media supplemented with pectin. Less intense were these effects on the mutant transformed with PLC-A gene rupture (AP27). Neomycin also delayed the germination in cultures growing on glucose or pectin; however, on glucose, the nuclear division was inhibited whereas in pectin it was stimulated. These effects were minor in AP27. The effects of Ro-31-8425 and BIM (both Pkc inhibitors) were also opposite for cultures growing on glucose or pectin. On glucose cultures of both strains BIM delayed germination and the first nuclear division, whereas on pectin both parameters were stimulated. Opposite effects were also detected when the cultures were growing on glucose or pectin in the presence of Ro-31-8425.

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Abbreviations

BIM:

bisindolylmaleimide

C48/80:

compound 48/80

CM:

complete medium

DAG:

di-O-acylglycerol

DAPI:

4′,6-diamidino-2-phenylindole

DMSO:

dimethylsulfoxide

IP3 :

myo-inositol 1,4,5-triphosphate

MM:

minimal medium

Neo:

neomycin

PBS:

phosphate-buffered saline

PI3K:

phosphoinositide 3-kinase

PIP:

phosphatidylinositol 4-phosphate

PIP2 :

phosphatidylinositol 4,5-bisphos

PI-PLC:

phosphoinositide-specific phospholipase C

Pkc(s):

protein kinase(s) C (EC 2.7.11.13)

PkcA:

protein kinase C of A. nidulans

PkcB:

see text

pkcA, pkcB:

see text

PLC:

phospholipase C (EC 3.1.4.3)

Ro-31-8425:

2-[8-(aminomethyl)-6,7,8,9-tetrahydropyrido-[1,2-a]-indol-3-yl]-3-(1-methyl-1H-indol-3-yl)maleimide

Spm:

spermine (5,10-diazadodecane-1,12-diamine)

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Authors and Affiliations

  1. Departamento de Ciências Farmacêuticas, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil

    M. A. S. C. Chellegatti, P. D. Yuvamoto & S. Said

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  1. M. A. S. C. Chellegatti
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  2. P. D. Yuvamoto
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  3. S. Said
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Correspondence to S. Said.

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Chellegatti, M.A.S.C., Yuvamoto, P.D. & Said, S. Role of phospholipase C and protein kinase C in Aspergillus nidulans during growth on pectin or glucose: Effects on germination and duplication cycle. Folia Microbiol 55, 228–232 (2010). https://doi.org/10.1007/s12223-010-0033-6

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  • DOI: https://doi.org/10.1007/s12223-010-0033-6

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