Isolation and physical characterization of three essential conidiation genes from Aspergillus nidulans.

M. T. Boylan, P. M. Mirabito, C. E. Willett, C. R. Zimmerman, W. E. Timberlake

Research output: Contribution to journalArticlepeer-review

184 Scopus citations

Abstract

We cloned and characterized three genes from Aspergillus nidulans, designated brlA, abaA, and wetA, whose activities are required to complete different stages of conidiophore development. Inactivation of these genes causes major abnormalities in conidiophore morphology and prevents expression of many unrelated, developmentally regulated genes, without affecting the expression of nonregulated genes. The three genes code for poly(A)+ RNAs that begin to accumulate at different times during conidiation. The brlA- and abaA-encoded RNAs accumulate specifically in cells of the conidiophore. The wetA-encoded RNA accumulates in mature conidia. Inactivation of the brlA gene prevents expression of the abaA and wetA genes, whereas inactivation of the abaA gene prevents expression of the wetA gene. Our results confirm genetic predictions as to the temporal and spatial patterns of expression of these genes and demonstrate that these patterns are specified at the level of RNA accumulation.

Original languageEnglish
Pages (from-to)3113-3118
Number of pages6
JournalMolecular and Cellular Biology
Volume7
Issue number9
DOIs
StatePublished - 1987

ASJC Scopus subject areas

  • Molecular Biology
  • Cell Biology

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