Journal
MOLECULAR AND CELLULAR BIOLOGY
Volume 38, Issue 13, Pages -Publisher
AMER SOC MICROBIOLOGY
DOI: 10.1128/MCB.00091-18
Keywords
Gpn2; RNA polymerase II; Rba50; assembly factor
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Funding
- Ministry of Science and Technology of China [2013CB911000]
- National Natural Science Foundation of China [31230021]
- Peking-Tsinghua Center for Life Sciences
- National Key Laboratory of Protein and Plant Gene Research
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RNA polymerase II (RNAPII) is one of the central enzymes in cell growth and organizational development. It is a large macromolecular complex consisting of 12 subunits. Relative to the clear definition of RNAPII structure and biological function, the molecular mechanism of how RNAPII is assembled is poorly understood, and thus the key assembly factors acting for the assembly of RNAPII remain elusive. In this study, we identified two factors, Gpn2 and Rba50, that directly participate in the assembly of RNAPII. Gpn2 and Rba50 were demonstrated to interact with Rpb12 and Rpb3, respectively. An interaction between Gpn2 and Rba50 was also demonstrated. When Gpn2 and Rba50 are functionally defective, the assembly of the Rpb3 subcomplex is disrupted, leading to defects in the assembly of RNAPII. Based on these results, we conclude that Gpn2 and Rba50 directly participate in the assembly of the Rpb3 subcomplex and subsequently the biogenesis of RNAPII.
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