View source for 4mls


==Crystal structure of the SpyTag and SpyCatcher-deltaN1 complex==
<StructureSection load='4mls' size='340' side='right'caption='[[4mls]], [[Resolution|resolution]] 1.98&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4mls]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptococcus_pyogenes Streptococcus pyogenes]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4MLS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4MLS 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]] 1.984&#8491;</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=4mls FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4mls OCA], [https://pdbe.org/4mls PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4mls RCSB], [https://www.ebi.ac.uk/pdbsum/4mls PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4mls ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q8G9G1_STRPY Q8G9G1_STRPY] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Peptide tagging is a key strategy for observing and isolating proteins. However, the interactions of proteins with peptides are nearly all rapidly reversible. Proteins tagged with the peptide SpyTag form an irreversible covalent bond to the SpyCatcher protein via a spontaneous isopeptide linkage, thereby offering a genetically encoded way to create peptide interactions that resist force and harsh conditions. Here, we determined the crystal structure of the reconstituted covalent complex of SpyTag and SpyCatcher at 2.1A resolution. The structure showed the expected reformation of the beta-sandwich domain seen in the parental streptococcal adhesin, but flanking sequences at both N- and C-termini of SpyCatcher were disordered. In addition, only 10 out of 13 amino acids of the SpyTag peptide were observed to interact with SpyCatcher, pointing to specific contacts important for rapid split protein reconstitution. Based on these structural insights, we expressed a range of SpyCatcher variants and identified a minimized SpyCatcher, 32 residues shorter, that maintained rapid reaction with SpyTag. Together, these results give insight into split protein beta-strand complementation and enhance a distinct approach to ultrastable molecular interaction.

Structural Analysis and Optimization of the Covalent Association between SpyCatcher and a Peptide Tag.,Li L, Fierer JO, Rapoport TA, Howarth M J Mol Biol. 2013 Oct 23. pii: S0022-2836(13)00666-9. doi:, 10.1016/j.jmb.2013.10.021. PMID:24161952<ref>PMID:24161952</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4mls" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Streptococcus pyogenes]]
[[Category: Fierer JO]]
[[Category: Howarth M]]
[[Category: Li L]]
[[Category: Rapoport TA]]