Abstract
In addition to the Neurospora crassa mutant col-2, mutations in two other unlinked genes, balloon and frost, lead to distinct morphological growth and abnormal glucose-6-phosphate dehydrogenases. The glucose-6-phosphate dehydrogenases from these strains have increased thermolabilities, altered kinetic parameters, and distinctive electrofocusing patterns. The altered enzyme segregates with each morphological phenotype in crosses to wild type, and there is a correlation between the severity of the enzymic defect and the degree of morphological abnormality in heterocaryons and double mutants.
These results are compatible with the hypotheses that the balloon, frost, and col-2 genes are structural genes for glucose-6-phosphate dehydrogenase and that the pleiotropic effects of these altered dehydrogenases are responsible for the mutant morphologies.
Full text
PDFImages in this article
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Barratt R. W., Garnjobst L. Genetics of a Colonial Microconidiating Mutant Strain of Neurospora Crassa. Genetics. 1949 Jul;34(4):351–369. doi: 10.1093/genetics/34.4.351. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Brody S. Correlation between reduced nicotinamide adenine dinucleotide phosphate levels and morphological changes in Neurospora crassa. J Bacteriol. 1970 Mar;101(3):802–807. doi: 10.1128/jb.101.3.802-807.1970. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Brody S., Tatum E. L. Phosphoglucomutase mutants and morphological changes in neurospora crassa. Proc Natl Acad Sci U S A. 1967 Sep;58(3):923–930. doi: 10.1073/pnas.58.3.923. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Brody S., Tatum E. L. The primary biochemical effect of a morphological mutation in Neurospora crassa. Proc Natl Acad Sci U S A. 1966 Oct;56(4):1290–1297. doi: 10.1073/pnas.56.4.1290. [DOI] [PMC free article] [PubMed] [Google Scholar]
- DE TERRA N., TATUM E. L. Colonial growth of Neurospora. Sorbose and enzymes alter the composition of the cell wall and induce morphological changes. Science. 1961 Oct 13;134(3485):1066–1068. doi: 10.1126/science.134.3485.1066. [DOI] [PubMed] [Google Scholar]
- Garnjobst L., Tatum E. L. A survey of new morphological mutants in Neurospora crassa. Genetics. 1967 Nov;57(3):579–604. doi: 10.1093/genetics/57.3.579. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kirkman H. N., Riley H. D., Crowell B. B. DIFFERENT ENZYMIC EXPRESSIONS OF MUTANTS OF HUMAN GLUCOSE-6-PHOSPHATE DEHYDROGENASE. Proc Natl Acad Sci U S A. 1960 Jul;46(7):938–944. doi: 10.1073/pnas.46.7.938. [DOI] [PMC free article] [PubMed] [Google Scholar]
- LOWRY O. H., ROSEBROUGH N. J., FARR A. L., RANDALL R. J. Protein measurement with the Folin phenol reagent. J Biol Chem. 1951 Nov;193(1):265–275. [PubMed] [Google Scholar]
- Mahadevan P. R., Tatum E. L. Relationship of the major constituents of the Neurospora crassa cell wall to wild-type and colonial morphology. J Bacteriol. 1965 Oct;90(4):1073–1081. doi: 10.1128/jb.90.4.1073-1081.1965. [DOI] [PMC free article] [PubMed] [Google Scholar]
- TSAO M. U. Dehydrogenases of neurospora crassa. Science. 1962 Apr 6;136(3510):42–43. doi: 10.1126/science.136.3510.42. [DOI] [PubMed] [Google Scholar]
- Vesterberg O., Svensson H. Isoelectric fractionation, analysis, and characterization of ampholytes in natural pH gradients. IV. Further studies on the resolving power in connection with separation of myoglobins. Acta Chem Scand. 1966;20(3):820–834. doi: 10.3891/acta.chem.scand.20-0820. [DOI] [PubMed] [Google Scholar]
- Yue R. H., Noltmann E. A., Kuby S. A. Glucose 6-phosphate dehydrogenase from brewers' yeast (Zwischenferment). 3. Studies on the subunit structure and on the molecular association phenomenon induced by triphosphopyridine nucleotide. J Biol Chem. 1969 Mar 10;244(5):1353–1364. [PubMed] [Google Scholar]