A study on the human mitochondrial RNA polymerase activity points to existence of a transcription factor B-like protein.

In the present work, the RNA polymerase activity of the human mitochondrial RNA polymerase mature protein (h-mtRPOLm) is shown, and its molecular activity calculated (2.1+/-0.9 min(-1)). An activity analysis of h-mtRPOLm and deleted versions of it has demonstrated that the entire recombinant protein is required for this activity. In addition, h-mtRPOLm alone or in presence of the known mitochondrial transcription factors (human mitochondrial transcription factor A and/or human mitochondrial transcription termination factor) is not able to initiate transcription from the specific human mitochondrial promoters pointing to the existence of a human mitochondrial transcription factor B-like protein.

Citation

A Prieto-Martín, J Montoya, F Martínez-Azorín. A study on the human mitochondrial RNA polymerase activity points to existence of a transcription factor B-like protein. FEBS letters. 2001 Aug 10;503(1):51-5

Mesh Tags

Substances

PMID: 11513853

search → result