*Yesselman JD, *Denny SK, Bisaria N, Herschlag D, Greenleaf WJ, Das R “Sequence-dependent RNA helix conformational preferences predictably impact tertiary structure formation”, in review, Proceedings of the National Academy of Sciences U.S.A (Link | Paper | Preprint)
RNAMake-ΔΔG accounts for changes in tertiary RNA assembly affinity in a blind prediction challenge.
Scatterplot compares the dependence of the observed changes in ΔΔG (compared to the median) on the RNAMake-ΔΔG model for 1536 chip piece variants (R = 0.84). Red dashed line indicates the best-fit line (slope = 0.54); cyan dotted line indicates the line of slope 1.
 Yesselman JD, Eiler D, Carlson ED, Gotrik MR, d'Aquino AE, Ooms AN, Kladwang W, Shi X, Costantino D, Lucks JB, Herschlag D, Jewett MC, Kieft JS, Das R "Computational Design of Asymmetric Three-dimensional RNA Structures and Function” Nature Nanotechnology, accepted (Link | Paper | Preprint)
Problems in RNA nanotechnology solved by RNAMake
(a) ‘miniTTRs’ require two strands (green, purple between tetraloop (orange) and tetraloop-receptor (blue); (b) tethered ribosomes require two strands (green, purple) to link the small subunit (orange) to the large subunit (blue). c) ‘Locking’ a small-molecule binding aptamer (cyan; ATP molecule in pink spheres) by designing four strands (green, purple, teal, magenta) to a peripheral tertiary contact(orange, blue). d) Demonstration of RNAMake design algorithm, which builds an RNA path via the successive addition of motifs and helices from a starting base pair to the ending base pair.
High throughput measurements of RNA tertiary structure energetics
Characterizing the thermodynamic fingerprints of >1,000 RNA junctions reveals principles for how RNA sequence affects tertiary assembly energetics, highlighting a path toward tertiary folding prediction by integrating static structural and dynamic energetic information.
RMDB simplifies chemical mapping data distribution
Screenshot of the new interactive user interface for viewing RMDB entries: An example of an entry.
M2-seq recovers helices across diverse RNA folds
M2-seq recovers the secondary structure of the P4–P6 domain of Tetrahymena ribozyme. Depicts the crystallographic secondary structure and M2-seq data (square graphs) with colored labels (on both display items) marking helices and multihelix domains automatically identified by M2-net analysis (A neural network).
Structural comparison between medaka and human telemerase pseudoknot
Comparison of minimal mdPK and hPK (PDB ID code 2K95) structures. Secondary structure elements are P2b (red), P3 (blue), J2a/3 (green), and J2b/3 (gold).
Model of active state transition in Tetrahymena ribozyme
Models for active site interactions within (E•S•G)O and (E•S•G)C.. The black arrows highlight changes in the positions of active site residues in going from (E•S•G)C to (E•S•G)O.
FARFAR RNA 3D prediction accuracy
A) GCAA tetraloop (1ZIH), RNA Denovo lowest energy models displays a high level of convergence. B) Pseudoknot (1L2X), less converged then tetraloop but also larger, still within 3Å heavy-atom rmsd for top model. C) 4x4 internal loop solved by NMR at PDB ID 2L8F, converges despite presenting 4 non-canonical base pairs.
Accessing accurate RNA 3D Rosetta modeling
RP domain IV RNA (PDB ID: 1LNT) contains highly conserved AC base pairs that RNA-Redesign mutates to stabilize the RNA
Schematic and runtime of the primerize algorithm
Schematic of the Primerize algorithm. Tm (STEP 1) and misprime matrices (STEP 2) are pre-calculated for the dynamic programming assembly.
Survey of C---OH hydrogen bonds in proteins
Depiction of angles and distances measured. B: Methyl hydrogen donor to acceptor distances in which the acceptor is oxygen (solid line) or carbon (dashed line). Dashed-dot line is the difference of the latter curves. C: Elevation angles of methyl CH···O hydrogen bonds. D: Methyl CH···X angles in which X is oxygen (solid line) or carbon (dashed line).
 Horowitz S, Dirk LM, Yesselman JD, Nimtz JS, Adhikari U, Mehl RA, Scheiner S, Houtz RL, Al-Hashimi HM, Trievel RC (2013) "Conservation and functional importance of carbon-oxygen hydrogen bonding in AdoMet-dependent methyltransferases" Journal of the American Chemical Society 16;135(41):15536-48 (Link | Paper)
Six classes of adomet-dependent methyltransferases
The hydrogen-bond donor and methyl C···O interaction distances are labeled in each enzyme.
Chemical classes requiring additional refinement
Average unsigned errors of hydration free energies for specific chemical classes for (top panel) CGENFF molecules and (bottom panel) non-CGENFF compounds.
Quality of the minimized MATCH-typed molecules
PubChem drug-like molecules that were successfully processed using the CGENFF libraries within MATCH to generate their respective topology and parameter files. RMSD was computed by comparing conformations found in the PubChem database to the ones after minimization.
Locations of ionizable residues in Δ+PHS
Δ+PHS staphylococcal nuclease is shown here with all ionizing residues highlighted. Glutamic acid is cyan, and aspartic acid is orange. (From: Predicting extreme pKa shifts in staphylococcal nuclease mutants with constant pH molecular dynamics
Optimized active site with bound adomet
Truncated AdoMet and the protein are depicted with green and gray carbon atoms, respectively. Residues labeled in red designate CH O acceptors. H O distances from methyl protons to nearest oxygen atom for optimized and broken geometry are shown in magenta and cyan, respectively.