Copper co-crystallization and divalent metal salts cross-influence effect: A new optimization tool improving crystal morphology and diffraction quality

Tomčová, Ivana; Smatanová, Ivana Kutá

doi:10.1016/j.jcrysgro.2007.05.054

Cited by 9 publications

(18 citation statements)

References 25 publications

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“…Additives can stabilize or create conformity by specific interaction with the macromolecules. There are numerous reports of the use of small salt additives to improve the quality and size of macromolecular crystals (Tomčová et al, 2006(Tomčová et al, , 2007Hartmut, 1991;Ducruix & Giege, 2000;Cudney, 1994;Sousa, 1995;Trakhanov & Quiocho, 1995). However, as the general protocol of additive usage has not been well defined yet, we are including this procedure in the following text.…”

Section: Additive Screeningmentioning

confidence: 99%

“…This new crystallization procedure was verified and the effects of selected additives on crystallization of two different proteins; one well-known "model" protein thaumatin and one crystallographically unexplored di-heme cytochrome c4 from an anaerobic organism (Tomčová et al, 2006) using this procedure were tested. Thaumatin has been chosen for our study because its crystals are often obtained in many different crystallization conditions as well-shaped tetragonal bipyramids, thus it makes sense to study any changes in their internal packing and morphology by cross-crystallization method (Tomčová & Kutá Smatanová, 2007). The final results are summarized and briefly discussed in followed paragraph.…”

Section: Cross-influence Procedures (Cip)mentioning

confidence: 99%

“…A1-2). In our experiments, thaumatin was crystallized using the standard sitting drop method from the polyethylene glycol (PEG) as a precipitating agent (Tomčová et al, 2007). Well-constructed tetragonal bipyramids were obtained from described crystallization conditions.…”

Section: The Observed Effect Of Cip: Thaumatin Crystallizationmentioning

confidence: 99%

“…In parallel to modern high-throughput approaches used in the protein crystallization, in recent years we performed basic research on physico-chemical properties and molecular interactions influencing crystal growth. Empirically, we have explored another tool useful for optimization strategy that was first described by Tomčová and Kutá Smatanová (2007). A new crystallization procedure modifying protein crystal morphology, internal packing and influencing crystal growth was tested particularly.…”

Section: Introductionmentioning

confidence: 99%

“…The presence of metal ions significantly influences the crystal growth, as the modification of crystal morphology and internal packing were observed. This newly discovered cross-crystallization method (Tomčová & Kutá Smatanová, 2007;Tomčová et al, 2006) was called Cross-Influence Procedure (CIP).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Alternative Protein Crystallization Technique: Cross-Influence Procedure (CIP)

Nemčovičová¹,

Smatanová²

2012

Crystallization and Materials Science of Modern Artificial and Natural Crystals

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Section: Additive Screeningmentioning

confidence: 99%

Section: Cross-influence Procedures (Cip)mentioning

confidence: 99%

Section: The Observed Effect Of Cip: Thaumatin Crystallizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Alternative Protein Crystallization Technique: Cross-Influence Procedure (CIP)

Nemčovičová¹,

Smatanová²

2012

Crystallization and Materials Science of Modern Artificial and Natural Crystals

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Polymorphic Protein Crystal Growth: Influence of Hydration and Ions in Glucose Isomerase

Gillespie

Asthagiri

Lenhoff

2013

Crystal Growth & Design

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Crystal polymorphs of glucose isomerase were examined to characterize the properties and to quantify the energetics of protein crystal growth. Transitions of polymorph stability were measured in poly(ethylene glycol)/NaCl solutions, and one transition point was singled out for more detailed quantitative analysis. Single crystal x-ray diffraction was used to confirm space groups and identify complementary crystal structures. Crystal polymorph stability was found to depend on the NaCl concentration, with stability transitions requiring > 1 M NaCl combined with a low concentration of PEG. Both salting-in and salting-out behavior was observed and was found to differ for the two polymorphs. For NaCl concentrations above the observed polymorph transition, the increase in solubility of the less stable polymorph together with an increase in the osmotic second virial coefficient suggests that changes in protein hydration upon addition of salt may explain the experimental trends. A combination of atomistic and continuum models was employed to dissect this behavior. Molecular dynamics simulations of the solvent environment were interpreted using quasi-chemical theory to understand changes in protein hydration as a function of NaCl concentration. The results suggest that protein surface hydration and Na+ binding may introduce steric barriers to contact formation, resulting in polymorph selection.

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Function-Biased Choice of Additives for Optimization of Protein Crystallization: The Case of the Putative Thioesterase PA5185 from Pseudomonas aeruginosa PAO1

Chruszcz

Zimmerman

Wang

et al. 2008

Crystal Growth & Design

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The crystal structure of PA5185, a putative thioesterase from Pseudomonas aeruginosa strain PAO1, was solved using multi-wavelength anomalous diffraction to 2.4 Å. Analysis of the structure and information about the putative function of the protein were used to optimize crystallization conditions. The crystal growth was optimized by applying additives with chemical similarity to a fragment of a putative PA5185 substrate (CoA or its derivative). Using new crystallization conditions containing this function-biased set of additives, several new crystal forms were produced and structures of three of them (in three different space groups) were determined. One of the new crystal forms had an improved resolution limit of 1.9 Å, and another displayed an alternative conformation of the highly-conserved loop containing Asn26, which could play a physiological role. Surprisingly, none of the additives were ordered in the crystal structures. Application of function-biased additives could be used as a standard optimization protocol for producing improved diffraction, or new crystal forms, which may lead to better understanding of the biological functions of proteins.

show abstract

Copper co-crystallization and divalent metal salts cross-influence effect: A new optimization tool improving crystal morphology and diffraction quality

Cited by 9 publications

References 25 publications

Alternative Protein Crystallization Technique: Cross-Influence Procedure (CIP)

Alternative Protein Crystallization Technique: Cross-Influence Procedure (CIP)

Polymorphic Protein Crystal Growth: Influence of Hydration and Ions in Glucose Isomerase

Function-Biased Choice of Additives for Optimization of Protein Crystallization: The Case of the Putative Thioesterase PA5185 from Pseudomonas aeruginosa PAO1

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