EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Developmental regulation of amino acid transport in Neurospora crassa


Journal of Bacteriology 104(2): 689-697
Developmental regulation of amino acid transport in Neurospora crassa
Conidia of Neurospora crassa exhibit an ability to transport various amino acids against a concentration gradient. The conidial transport system has previously been characterized in terms of kinetics, competitions, and genetic control. This study describes the development of a new and highly active transport capability which is elaborated during the early stages of development but prior to evident germination. It has been named "postconidial" transport activity and represents as much as 20-fold greater initial rates as compared to those observed with conidia. Development of the postconidial transport activity requires protein synthesis and can be partially repressed when the substrate amino acid is present during the developmental preincubation period. A mutant has been utilized which exhibits normal conidial but fails to develop normal postconidial transport activity for any amino acid examined. Although temperature optimum and pH dependence are similar in conidial and postconidial systems, there is evidence that the new activity is not a simple amplification of an existing capability. This is reflected as a change in competition patterns between particular amino acids as development proceeds.


Accession: 005138657

PMID: 5489433



Related references

Mechanisms of developmental regulation of amino acid transport in Neurospora crassa. 1972

Regulation of amino acid assimilation in a strain of Neurospora crassa lacking basic amino acid transport activity. Biochimica et Biophysica Acta 192(3): 455-461, 1969

Amino acid transport in Neurospora crassa. IV. Properties and regulation of a methionine transport system. Biochimica et Biophysica Acta 233(1): 201-214, 1971

Kinetic and genetic studies of amino acid transport in neurospora abstract neurospora crassa. Genetics 60(1 PART 2): 209, 1968

Amino acid transport in Neurospora crassa. II. Properties of a basic amino acid transport system. Biochimica et Biophysica Acta 203(1): 139-149, 1970

Amino acid transport in Neurospora crassa. I. Properties of two amino acid transport systems. Biochimica et Biophysica Acta 173(1): 113-127, 1969

Amino acid transport in Neurospora crassa. BNWL-280. Bnwl Reports . U.S. Atomic Energy Commission: 92-95, 1966

Molecular transport. I. In vivo studies of transport mutants of Neurospora crassa with altered amino acid competition patterns. Archives of Biochemistry and Biophysics 144(2): 503-511, 1971

Regulation of L-amino acid axidase and of D-amino acid oxidase in Neurospora crassa Fungi. MGG molecular and general genetics86(1): 33-39, 1982

Interactions between amino acid transport systems in Neurospora crassa. Journal of Bacteriology 112(1): 276-284, 1972