Contribution of RNA polymerase concentration variation to protein expression noise
- Authors
- Yang, Sora; Kim, Seunghyeon; Lim, Yu Rim; Kim, Cheolhee; An, Hyeong Jeon; Kim, Ji-Hyun; Sung, Jaeyoung; Lee, Nam Ki
- Issue Date
- Sep-2014
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- NATURE COMMUNICATIONS, v.5
- Journal Title
- NATURE COMMUNICATIONS
- Volume
- 5
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/11888
- DOI
- 10.1038/ncomms5761
- ISSN
- 2041-1723
- Abstract
- Cell-to-cell variation in gene expression, or noise, is a general phenomenon observed within cell populations. Transcription is known to be the key stage of gene expression where noise is generated, however, how variation in RNA polymerase (RNAP) concentration contributes to gene expression noise is unclear. Here, we quantitatively investigate how variations in absolute amounts of RNAP molecules affect noise in the expression of two fluorescent protein reporters driven by identical promoters. We find that intrinsic noise is independent of variation in RNAP concentrations, whereas extrinsic noise, which is variation in gene expression due to varying cellular environments, scales linearly with variation in RNAP abundance. Specifically, the propagation of RNAP abundance variation to expressed protein noise is inversely proportional to the concentration of RNAP, which suggests that the change in noise that results from RNAP fluctuations is determined by the fraction of promoters that is not occupied by RNAP.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Natural Sciences > Department of Chemistry > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.