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The "initiator" as a transcription control element 总被引:234,自引:0,他引:234
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Isolation and physical characterization of three essential conidiation genes from Aspergillus nidulans. 总被引:24,自引:6,他引:18
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M T Boylan P M Mirabito C E Willett C R Zimmerman W E Timberlake 《Molecular and cellular biology》1987,7(9):3113-3118
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. 相似文献
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