AtSig5 is an essential nucleus-encoded Arabidopsis [sigma]-like factor1

From: Plant Physiology | Date: June 1, 2003| Author: | Copyright information

Transcription of chloroplast genes is subject to control by nucleus-encoded proteins. The chloroplast-encoded RNA polymerase (PEP) is a eubacterial-type RNA polymerase that is presumed to assemble with nucleus-encoded [sigma]-factors mediating promoter recognition. Recently, families of [sigma]-factor genes have been identified in several plants including Arabidopsis. One of these genes, Arabidopsis S1G5, encodes a [sigma]-factor, AtSig5, which is phylogenetically distinct from the other family members. To investigate the role of this plant [sigma]-factor, two different insertional alleles of ...

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