In chloroplasts, transcription of plastid genes is mediated by two types of RNA polymerase: plastid-encoded RNA polymerase (PEP) and nuclearencoded RNA polymerase (NEP). Transcription in plastids is also mediated by a number of nuclear-encoded factors in addition to PEP and NEP. In the insoluble RNA polymerase preparation samples, a total of 18 components named as pTACs (pTAC1 to pTAC18) were identified. pTAC11 (AT2G02740) is one of the components associated with PEP complex.pTAC11 is also termed as ATWHY3.
FTSH4 is an FtsH protease that is localized to the mitochondrion. Loss of function results in increased determinacy of the meristem that is exacerbated when plants are grown at higher temperatures.
FTSH10 is localized to the mitochondrion, it is involved in the assembly and/or stability of the complexes I and V of the mitochondrial oxidative phosphorylation system.
DNA topoisomerase 2, ATTOPII, TOPII, TOPOISOMERASE II
Background:
DNA topoisomerase II is highly expressed in young seedlings. It is localized in the nucleus and gene expression levels are increased in proliferative tissues.
CSY is required for the fatty acid respiration in seedlings, citrate being exported from peroxisomes into mitochondria during respiration of triacylglycerol (TAG). And CSY is also a key enzyme of the glyoxylate cycle. In Arabidopsis, CSY protein is including CSY1 (AT3G58740), CSY2 (AT3G58750) and CSY3 (AT2G42790).