Cyclic AMP levels in relation to membrane phospholipid variations in Neurospora crassa

1983 ◽  
Vol 134 (2) ◽  
pp. 108-113 ◽  
Author(s):  
Christine Gabrielides ◽  
Joanne Zrike ◽  
William A. Scott
Keyword(s):  
Cyclic Amp ◽  
Neurospora Crassa ◽  
Membrane Phospholipid

scholarly journals Deficient cyclic adenosine 3',5'-monophosphate control in mutants of two genes of Neurospora crassa.

1981 ◽  
Vol 1 (1) ◽  
pp. 1-8 ◽  
Author(s):  
M L Pall ◽  
J M Trevillyan ◽  
N Hinman
Keyword(s):  
Plasma Membrane ◽  
Membrane Potential ◽  
Cyclic Amp ◽  
Adenylate Cyclase ◽  
Neurospora Crassa ◽  
Alternative Oxidase ◽  
Oscillatory Behavior ◽  
Wild Type ◽  
Glucose Transport System ◽  
Regulated Functions

Strains of Neurospora crassa mutant in either of two genes, Crisp-1 (cr1) and Frost (fr), showed no increase of cyclic adenosine 3',5'-monophosphate (cyclic AMP) levels when subjected to several treatments which produce large increases of cyclic AMP in wild-type Neurospora. Evidently, the previously reported deficiencies of adenylate cyclase in these mutants were sufficient to block the normal increases. This fact suggests that both mutants could be used to help determine which control phenomena involve cyclic AMP and to interrupt the control of established cyclic AMP-regulated functions. Earlier studies had suggested an interdependence of the cyclic AMP level and the electric potential difference across the plasma membrane of Neurospora. Present experiments, therefore, employed several strains with the cr1 mutation to test for possible roles of cyclic AMP in recovery and oscillatory behavior of the Neurospora membrane potential. The results showed all such phenomena to be normal in the adenylate cyclase-defective strains, which demonstrates that variations of cyclic AMP are not obligatorily involved in the apparent control processes. Evidence is also presented that the induction of both glucose transport system II and the alternative oxidase do not require elevated cyclic AMP levels.

scholarly journals Characterization of Neurospora crassa cyclic AMP phosphodiesterase activated by calmodulin

1985 ◽  
Vol 232 (2) ◽  
pp. 425-430 ◽  
Author(s):  
M T Téllez-Iñón ◽  
R M Ulloa ◽  
G C Glikin ◽  
H N Torres
Keyword(s):  
Cyclic Amp ◽  
Neurospora Crassa ◽  
Cyclic Nucleotide ◽  
Neuroleptic Drugs ◽  
Wild Type ◽  
Cyclic Amp Phosphodiesterase ◽  
Aerial Hyphae

Activation of cyclic AMP phosphodiesterase I by brain or Neurospora calmodulin was studied. The stimulation required micromolar concentrations of Ca2+, and it was observed at cyclic AMP concentrations between 0.1 and 500 microM. Activation was blocked by EDTA and some neuroleptic drugs such as chlorpromazine and fluphenazine. These drugs inhibit the elongation of N. crassa wild-type aerial hyphae. These results reinforce the evidence towards the recognition of Ca2+-calmodulin as one of the systems controlling cyclic nucleotide concentrations in Neurospora.

Relationship between cyclic AMP level and accumulation of carotenoid pigments in Neurospora crassa

1982 ◽  
Vol 133 (3) ◽  
pp. 206-208 ◽  
Author(s):  
M. S. Kritsky ◽  
V. Y. Sokolovsky ◽  
T. A. Belozerskaya ◽  
E. K. Chernysheva
Keyword(s):  
Cyclic Amp ◽  
Neurospora Crassa ◽  
Carotenoid Pigments

scholarly journals Mobilisation of trehalose in mutants of the cyclic AMP signalling pathway, cr-1 (CRISP-1) and mcb (microcycle conidiation), of Neurospora crassa

2001 ◽  
Vol 199 (1) ◽  
pp. 85-89 ◽  
Author(s):  
Catherine A Pinho ◽  
Maria Lourdes ◽  
T.M. Polizeli ◽  
João A Jorge ◽  
Héctor F Terenzi
Keyword(s):  
Cyclic Amp ◽  
Neurospora Crassa ◽  
Signalling Pathway ◽  
Microcycle Conidiation

scholarly journals Effect of cyclic AMP on invertase activity in Neurospora crassa

1992 ◽  
Vol 138 (11) ◽  
pp. 2433-2439 ◽  
Author(s):  
H. Terenzi ◽  
H. F. Terenzi ◽  
J. A. Jorge
Keyword(s):  
Cyclic Amp ◽  
Neurospora Crassa ◽  
Invertase Activity

scholarly journals Cyclic nucleotide phosphodiesterase activities in Neurospora crassa

1982 ◽  
Vol 203 (3) ◽  
pp. 611-616 ◽  
Author(s):  
M T Téllez-I ñón ◽  
G C Glikin ◽  
H N Torres
Keyword(s):  
Cyclic Amp ◽  
Neurospora Crassa ◽  
Cyclic Gmp ◽  
Cyclic Nucleotide ◽  
Gradient Centrifugation ◽  
Gel Filtration ◽  
Deae Cellulose ◽  
Cyclic Nucleotide Phosphodiesterase ◽  
Sucrose Density Gradient Centrifugation ◽  
Molecular Weights

Cyclic nucleotide phosphodiesterase activities in soluble Neurospora crassa mycelial extracts were resolved into two peaks, phosphodiesterase I and II, by chromatography on DEAE-cellulose columns. Phosphodiesterase I hydrolysed cyclic AMP and cyclic GMP equally well. Phosphodiesterase II was active on cyclic GMP but scarcely active on cyclic AMP. Phosphodiesterase I was resolved by gel filtration and sucrose-density-gradient centrifugation into three peaks having molecular weights of about 57 000, 125 000 and 225 000. This suggests that this enzyme activity has at least three aggregation forms, tentatively defined as monomeric, dimeric and tetrameric. Similarly, phosphodiesterase II was resolved into two forms, having molecular weights of about 170 000 and 320 000. Evidence on the interconversion between phosphodiesterase I forms was obtained.

Deficient cyclic adenosine 3',5'-monophosphate control in mutants of two genes of Neurospora crassa

1981 ◽  
Vol 1 (1) ◽  
pp. 1-8
Author(s):  
M L Pall ◽  
J M Trevillyan ◽  
N Hinman
Keyword(s):  
Plasma Membrane ◽  
Membrane Potential ◽  
Cyclic Amp ◽  
Adenylate Cyclase ◽  
Neurospora Crassa ◽  
Alternative Oxidase ◽  
Oscillatory Behavior ◽  
Wild Type ◽  
Glucose Transport System ◽  
Regulated Functions

Strains of Neurospora crassa mutant in either of two genes, Crisp-1 (cr1) and Frost (fr), showed no increase of cyclic adenosine 3',5'-monophosphate (cyclic AMP) levels when subjected to several treatments which produce large increases of cyclic AMP in wild-type Neurospora. Evidently, the previously reported deficiencies of adenylate cyclase in these mutants were sufficient to block the normal increases. This fact suggests that both mutants could be used to help determine which control phenomena involve cyclic AMP and to interrupt the control of established cyclic AMP-regulated functions. Earlier studies had suggested an interdependence of the cyclic AMP level and the electric potential difference across the plasma membrane of Neurospora. Present experiments, therefore, employed several strains with the cr1 mutation to test for possible roles of cyclic AMP in recovery and oscillatory behavior of the Neurospora membrane potential. The results showed all such phenomena to be normal in the adenylate cyclase-defective strains, which demonstrates that variations of cyclic AMP are not obligatorily involved in the apparent control processes. Evidence is also presented that the induction of both glucose transport system II and the alternative oxidase do not require elevated cyclic AMP levels.

Sign in / Sign up

Export Citation Format

Share Document