Biochemistry/Microbiology 917: Regulation of Gene Expression Seminar
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We are currently meeting via an online platform. We will use Zoom for the journal club each week at the following link. The link is the same for each week. The password to join the online meeting, presenter schedule, and other details will be sent each week via the class email list. If you have concerns about the journal club operations, please communicate them to Bob Landick at firstname.lastname@example.org.
LINK TO MEETING: https://uwmadison.zoom.us/j/98315822588
Microbiology 612: Prokaryotic Molecular Biology
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RNA polymerase II in motion
Example of a true molecular dynamics movie. Physically realistic if you note the time scale. The entire movie shows 6 microseconds of RNAPII motions, meaning that it could be repeated over 150 times in the time it takes for you to blink your eye. An eye blink takes about 1 millisecond (1/1000th of a second or 1000 microseconds). Movie provided by Xuhui Huang and Daniel-Adriano Silva, Dept. of Chemistry, Hong Kong University of Science and Technology.
RNA polymerase II nucleotide addition cycle, transcript cleavage, and backtracking
Example of a morph movie. Not physically realistic, but illustrative of the nucleotide addition cycle. Adapted from Cheung and Cramer, 2012 Cell 149:1431.
Nucleotide addition cycle, elemental pausing, and hairpin-stabilized pausing and swiveling
Schematic movie illustrating nucleotide addition cycle, elemental pausing, and hairpin-stabilized pausing and swiveling. Credit: Seth Darst.
Model of expressome (ribosome-RNAP complex) based on cryoEM structure from Kohler et al., 2017 Science 356:194 with added elements from other ribosome and RNAP structures.
Molecular model of E. coli RNAP illustrating the swivel domain and its movements upon pause hairpin formation. From Kang et al., 2018 Mol Cell 69:802. Credit: Jin Young Kang.
Conserved core double-psi beta-barrel domains in the beta and beta-prime subunits of bacterial RNAP (illustrated with Thermus thermophilus RNAP, pdb 205i).