View source for 6dzf


==Orthorhombic trypsin cryocooled to 100 K with 20% xylose as cryoprotectant==
<StructureSection load='6dzf' size='340' side='right'caption='[[6dzf]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6dzf]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6DZF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=6DZF FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.2&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BEN:BENZAMIDINE'>BEN</scene>, <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=XYS:XYLOPYRANOSE'>XYS</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=6dzf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6dzf OCA], [https://pdbe.org/6dzf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=6dzf RCSB], [https://www.ebi.ac.uk/pdbsum/6dzf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=6dzf ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/TRY1_BOVIN TRY1_BOVIN] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Cryocooling of macromolecular crystals is commonly employed to limit radiation damage during X-ray diffraction data collection. However, cooling itself affects macromolecular conformation and often damages crystals via poorly understood processes. Here, the effects of cryosolution thermal contraction on macromolecular conformation and crystal order in crystals ranging from 32 to 67% solvent content are systematically investigated. It is found that the solution thermal contraction affects macromolecule configurations and volumes, unit-cell volumes, crystal packing and crystal order. The effects occur through not only thermal contraction, but also pressure caused by the mismatched contraction of cryosolvent and pores. Higher solvent-content crystals are more affected. In some cases the solvent contraction can be adjusted to reduce mosaicity and increase the strength of diffraction. Ice formation in some crystals is found to cause damage via a reduction in unit-cell volume, which is interpreted through solvent transport out of unit cells during cooling. The results point to more deductive approaches to cryoprotection optimization by adjusting the cryosolution composition to reduce thermal contraction-induced stresses in the crystal with cooling.

The impact of cryosolution thermal contraction on proteins and protein crystals: volumes, conformation and order.,Juers DH, Farley CA, Saxby CP, Cotter RA, Cahn JKB, Holton-Burke RC, Harrison K, Wu Z Acta Crystallogr D Struct Biol. 2018 Sep 1;74(Pt 9):922-938. doi:, 10.1107/S2059798318008793. Epub 2018 Sep 5. PMID:30198901<ref>PMID:30198901</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 6dzf" style="background-color:#fffaf0;"></div>

==See Also==
*[[Trypsin 3D structures|Trypsin 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Bos taurus]]
[[Category: Large Structures]]
[[Category: Juers DH]]