Dictionary > Stress granule

Stress granule

Stress granule refers to any of the cytosolic granules (100 – 200 nm) composed of proteins and mRNAs that form when the cell is under stress, e.g. exposure to heat or cold, oxidative stress, hyperosmotic stress, or UV. The formation of stress granules during cellular stress is presumed to be associated with protecting the RNAs from such conditions. Stress granules are closely associated with the stress response of endoplasmic reticulum. Possible pathways of stress granules are for storage, for degradation, or for re-initiation of translation. In some references, stress granules are regarded as non-membrane-bound organelles just as ribosomes, spliceosomes, centrioles, and cytoskeleton. In other references though, they are not organelles but cytoplasmic structures for their lack of a biological membrane.

See also


  1. Gutierrez-Beltran, E., Moschou, P. N., Smertenko, A. P., & Bozhkov, P. V. (March 2015). “Tudor staphylococcal nuclease links formation of stress granules and processing bodies with mRNA catabolism in Arabidopsis”. The Plant Cell. 27 (3): 926–43. DOI:10.1105/tpc.114.134494. PMC 4558657. PMID 25736060.
  2. Kayali, F., Montie, H. L., Rafols, J. A., & DeGracia, D. J. (2005). “Prolonged translation arrest in reperfused hippocampal cornu Ammonis 1 is mediated by stress granules”. Neuroscience. 134 (4): 1223–45. DOI:10.1016/j.neuroscience.2005.05.047.

© Biology Online. Content provided and moderated by Biology Online Editors

You will also like...