From c877c7c1434b22e91e671bc07d20f16d26a409bc Mon Sep 17 00:00:00 2001 From: "W. Trevor King" Date: Thu, 27 Jun 2013 13:54:31 -0400 Subject: [PATCH] root.bib: Fix a bunch of markup (e.g. [beta] -> $\beta$) Some of the citation exporters I've been using do a pretty bad job with non-ASCII characters. This fixes a few of the more obvious mistakes. --- src/root.bib | 69 ++++++++++++++++++++++++++-------------------------- 1 file changed, 34 insertions(+), 35 deletions(-) diff --git a/src/root.bib b/src/root.bib index 4a1775e..12fa4c9 100644 --- a/src/root.bib +++ b/src/root.bib @@ -1895,7 +1895,7 @@ author = DJBrockwell #" and "# EPaci #" and "# RCZinober #" and "# GSBeddard #" and "# PDOlmsted #" and "# DASmith #" and "# RNPerham #" and "# SERadford, - title = "Pulling geometry defines the mechanical resistance of a beta-sheet + title = "Pulling geometry defines the mechanical resistance of a $\beta$-sheet protein", year = 2003, month = sep, @@ -1916,7 +1916,7 @@ are still unclear, although the orientation of secondary structural elements relative to the applied force vector is thought to have an important function. Here, by using a method of protein immobilization - that allows force to be applied to the same all-beta protein, E2lip3, + that allows force to be applied to the same all-$\beta$ protein, E2lip3, in two different directions, we show that the energy landscape for mechanical unfolding is markedly anisotropic. These results, in combination with molecular dynamics (MD) simulations, reveal that the @@ -2039,11 +2039,11 @@ force spectroscopy. Force-extension and force-clamp curves obtained from Lethocerus projectin and Drosophila recombinant projectin or kettin fragments revealed that fibronectin type III domains in - projectin are mechanically weaker (unfolding force, Fu {approx} 50-150 - pN) than Ig-domains (Fu {approx} 150-250 pN). Among Ig domains in + projectin are mechanically weaker (unfolding force, Fu $\approx$ 50-150 + pN) than Ig-domains (Fu $\approx$ 150-250 pN). Among Ig domains in Sls/kettin, the domains near the N terminus are less stable than those - near the C terminus. Projectin domains refolded very fast [85% at 15 - s-1 (25{degrees}C)] and even under high forces (15-30 pN). Temperature + near the C terminus. Projectin domains refolded very fast [85\% at 15 + s-1 (25$\degrees$C)] and even under high forces (15-30 pN). Temperature affected the unfolding forces with a Q10 of 1.3, whereas the refolding speed had a Q10 of 2-3, probably reflecting the cooperative nature of the folding mechanism. High bending rigidities of projectin and kettin @@ -2289,8 +2289,7 @@ pages = "63--91", doi = "10.1016/S0079-6107(00)00017-1", issn = "0079-6107", - eprint = "http://www.pubmedcentral.nih.gov/picrender.fcgi?artid=1302160&blo - btype=pdf", + eprint = "http://www.pubmedcentral.nih.gov/picrender.fcgi?artid=1302160&blobtype=pdf", url = "http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1302160", keywords = "Elasticity;Hydrogen Bonding;Microscopy, Atomic Force;Protein Denaturation;Protein Engineering;Protein Folding;Recombinant @@ -2301,8 +2300,8 @@ the dynamic measurement of these processes at the single-molecule level. Protein engineering techniques allow the construction of homomeric polyproteins for the precise analysis of the mechanical - unfolding of single domains. alpha-Helical domains are mechanically - compliant, whereas beta-sandwich domains, particularly those that + unfolding of single domains. $\alpha$-Helical domains are mechanically + compliant, whereas $\beta$-sandwich domains, particularly those that resist unfolding with backbone hydrogen bonds between strands perpendicular to the applied force, are more stable and appear frequently in proteins subject to mechanical forces. The mechanical @@ -2666,7 +2665,7 @@ is characterized by detachment of a seven-residue N-terminal $\alpha$-helix from the beta barrel. We measure the equilibrium free energy cost associated with this transition - as 22 kBT. Detachment of this small $\alpha$-helix completely + as 22 $k_BT$. Detachment of this small $\alpha$-helix completely destabilizes GFP thermodynamically even though the $\beta$-barrel is still intact and can bear load. Mechanical stability of the protein on the millisecond timescale, @@ -2759,7 +2758,7 @@ pattern recognition, GFP", abstract = "Single molecule force spectroscopy has given experimental access to the mechanical properties of protein molecules. Typically, - less than 1% of the experimental recordings reflect true single + less than 1\% of the experimental recordings reflect true single molecule events due to abundant surface and multiple-molecule interactions. A key issue in single molecule force spectroscopy is thus to identify the characteristic mechanical `fingerprint' of a specific @@ -3514,12 +3513,12 @@ the first crystal form and biotin bound in only two subunits in a second. The major change associated with binding of biotin is the closure of the surface loop incorporating residues 45 to 52. Residues - 49 to 52 display a 3(10) helical conformation in unbound subunits of + 49 to 52 display a $3_{10}$ helical conformation in unbound subunits of our structures as opposed to the disordered loops observed in other structure determinations of streptavidin. In addition, the open - conformation is stabilized by a beta-sheet hydrogen bond between + conformation is stabilized by a $\beta$-sheet hydrogen bond between residues 45 and 52, which cannot occur in the closed conformation. The - 3(10) helix is observed in nearly all unbound subunits of both the co- + $3_{10}$ helix is observed in nearly all unbound subunits of both the co- crystallized and ligand-free structures. An analysis of the temperature factors of the binding loop regions suggests that the mobility of the closed loops in the complexed structures is lower than in the open @@ -3605,8 +3604,8 @@ segment that could be stretched entropically depending on the tip attachment site. The data presented here provide direct information about the forces required to extract an individual monomer from the - core of the PrP90-231 amyloid, and indicate that the beta-sheet core of - this amyloid starts at residue approximately 164-169. The latter + core of the PrP90-231 amyloid, and indicate that the $\beta$-sheet core of + this amyloid starts at residue $\approx$164-169. The latter finding has important implications for the ongoing debate regarding the structure of PrP amyloid." } @@ -3632,7 +3631,7 @@ contain such cryptic sites that promote the assembly of extracellular matrix FN fibrils. We have combined NMR and steered molecular dynamics simulations to study the structure and mechanical unfolding pathway of - FN-III1. This study finds that FN-III1 consists of a {beta}-sandwich + FN-III1. This study finds that FN-III1 consists of a $\beta$-sandwich structure that unfolds to a mechanically stable intermediate about four times the length of the native folded state. Considering previous experimental findings, our studies provide a structural model by which @@ -4792,7 +4791,7 @@ elasticity. Its physiological extension is largely derived from the PEVK segment, rich in proline (P), glutamate (E), valine (V), and lysine (K) residues. We studied recombinant PEVK molecules containing - the two conserved elements: {approx}28-residue PEVK repeats and E-rich + the two conserved elements: $\approx$28-residue PEVK repeats and E-rich motifs. Single molecule experiments revealed that calcium-induced conformational changes reduce the bending rigidity of the PEVK fragments, and site-directed mutagenesis identified four glutamate @@ -5119,7 +5118,7 @@ distance, occurs in distinct multiple stages. To clarify the molecular nature of folding starting from stretched conformations, we have probed the folding dynamics, upon force quench, for the single I27 domain from - the muscle protein titin by using a C{alpha}-Go model. Upon temperature + the muscle protein titin by using a C$\alpha$-Go model. Upon temperature quench, collapse and folding of I27 are synchronous. In contrast, refolding from stretched initial structures not only increases the folding and collapse time scales but also decouples the two kinetic @@ -5127,10 +5126,10 @@ with the stretched state to compact random coil transition. Surprisingly, force quench does not alter the nature of the refolding kinetics, but merely increases the height of the free-energy folding - barrier. Force quench refolding times scale as f1.gif, where {Delta}xf - {approx} 0.6 nm is the location of the average transition state along + barrier. Force quench refolding times scale as f1.gif, where $\Delta x_f$ + $\approx$ 0.6 nm is the location of the average transition state along the reaction coordinate given by end-to-end distance. We predict that - {tau}F and the folding mechanism can be dramatically altered by the + $\tau_F$ and the folding mechanism can be dramatically altered by the initial and/or final values of force. The implications of our results for design and analysis of experiments are discussed." } @@ -5800,7 +5799,7 @@ loading rates and time scales that closely match those used in atomic force microscopy experiments. By using the combined approach, we show that forced unfolding of GFP involves a bifurcation in the pathways to - the stretched state. After detachment of an N-terminal {alpha}-helix, + the stretched state. After detachment of an N-terminal $\alpha$-helix, unfolding proceeds along two distinct pathways. In the dominant pathway, unfolding starts from the detachment of the primary N-terminal -strand, while in the minor pathway rupture of the last, C-terminal @@ -5948,7 +5947,7 @@ extensive substitution, FNoTNc retains both the three-dimensional structure and the cell adhesion activity of FNfn10. Atomic force microscopy experiments reveal that the unfolding forces of the - engineered protein FNoTNc increase by {approx}20% to match those of + engineered protein FNoTNc increase by $\approx$20\% to match those of TNfn3. Thus, we have specifically designed a protein with increased mechanical stability. Our results demonstrate that core engineering can be used to change the mechanical strength of proteins while retaining @@ -5983,7 +5982,7 @@ number of critical hydrogen bonds in the peripheral strands. Interestingly, the simulations predict that lowering the pH from 7 to ∼4.7 will increase the mechanical stability - of FNfn10 significantly (by ∼33 %) due to the protonation of a + of FNfn10 significantly (by ∼33 \%) due to the protonation of a few key acidic residues in the A and B strands. To test this simulation prediction, we used single-molecule atomic force microscopy (AFM) to investigate the mechanical stability of @@ -7067,20 +7066,20 @@ eprint = "http://www.pnas.org/cgi/reprint/104/22/9278.pdf", url = "http://www.pnas.org/cgi/content/abstract/104/22/9278", abstract = "It is recognized that shear topology of two directly connected - force-bearing terminal [beta]-strands is a common feature among the + force-bearing terminal $\beta$-strands is a common feature among the vast majority of mechanically stable proteins known so far. However, these proteins belong to only two distinct protein folds, Ig-like - [beta] sandwich fold and [beta]-grasp fold, significantly hindering + $\beta$ sandwich fold and $\beta$-grasp fold, significantly hindering delineating molecular determinants of mechanical stability and rational tuning of mechanical properties. Here we combine single-molecule atomic force microscopy and steered molecular dynamics simulation to reveal that the de novo designed Top7 fold [Kuhlman B, Dantas G, Ireton GC, Varani G, Stoddard BL, Baker D (2003) Science 302:13641368] represents - a mechanically stable protein fold that is distinct from Ig-like [beta] - sandwich and [beta]-grasp folds. Although the two force-bearing [beta] + a mechanically stable protein fold that is distinct from Ig-like $\beta$ + sandwich and $\beta$-grasp folds. Although the two force-bearing $\beta$ strands of Top7 are not directly connected, Top7 displays significant mechanical stability, demonstrating that the direct connectivity of - force-bearing [beta] strands in shear topology is not mandatory for + force-bearing $\beta$ strands in shear topology is not mandatory for mechanical stability. This finding broadens our understanding of the design of mechanically stable proteins and expands the protein fold space where mechanically stable proteins can be screened. Moreover, our @@ -7089,7 +7088,7 @@ with different height of energy barrier. Such insights enabled us to rationally tune the mechanical stability of Top7 by redesigning its mechanical unfolding pathway. Our study demonstrates that computational - biology methods (including de novo design) offer great potential for + biology methods (including \emph{de novo} design) offer great potential for designing proteins of defined topology to achieve significant and tunable mechanical properties in a rational and systematic fashion." } @@ -8115,8 +8114,8 @@ photoactive yellow protein (PYP), a prototype of the PAS domain family. Mechanical unfolding of Cys-linked PYP multimers in the presence and absence of illumination reveals that, in contrast to previous studies, - the PAS domain itself is extended by {approx}3 nm (at the 10-pN - detection limit of the measurement) and destabilized by {approx}30% in + the PAS domain itself is extended by $\approx$3 nm (at the 10-pN + detection limit of the measurement) and destabilized by $\approx$30\% in the light-activated state of PYP. Comparative measurements and steered molecular dynamics simulations of two double-Cys PYP mutants that probe different regions of the PAS domain quantify the anisotropy in @@ -8147,7 +8146,7 @@ resolution of multidimensional spectroscopy with the chirality-specific sensitivity of amide vibrations to structure. We demonstrate how the structural sensitivity of cross-peaks in two-dimensional correlation - plots of chiral signals of an {alpha} helix and a [beta] hairpin may be + plots of chiral signals of an $\alpha$ helix and a $\beta$ hairpin may be used to clearly resolve structural and dynamical details undetectable by one-dimensional techniques (e.g. circular dichroism) and identify structures indistinguishable by NMR." -- 2.26.2