View source for 7ty1


==Crystal structure of apo eosinophil cationic protein (ribonuclease 3) from Macaca fascicularis (MfECP)==
<StructureSection load='7ty1' size='340' side='right'caption='[[7ty1]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7ty1]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Macaca_fascicularis Macaca fascicularis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7TY1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7TY1 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]] 1.8&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CIT:CITRIC+ACID'>CIT</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</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=7ty1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7ty1 OCA], [https://pdbe.org/7ty1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7ty1 RCSB], [https://www.ebi.ac.uk/pdbsum/7ty1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7ty1 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ECP_MACFA ECP_MACFA] Cytotoxin and helminthotoxin with low-efficiency ribonuclease activity. Possesses a wide variety of biological activities. Exhibits antibacterial activity (By similarity).
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Evolutionarily conserved structural folds can give rise to diverse biological functions, yet predicting atomic-scale interactions that contribute to the emergence of novel activities within such folds remains challenging. Pancreatic-type ribonucleases illustrate this complexity, sharing a core structure that has evolved to accommodate varied functions. In this study, we used ancestral sequence reconstruction to probe evolutionary and molecular determinants that distinguish biological activities within eosinophil members of the RNase 2/3 subfamily. Our investigation unveils functional, structural, and dynamical behaviors that differentiate the evolved ancestral ribonuclease (AncRNase) from its contemporary eosinophil RNase orthologs. Leveraging the potential of ancestral reconstruction for protein engineering, we used AncRNase predictions to design a minimal 4-residue variant that transforms human RNase 2 into a chimeric enzyme endowed with the antimicrobial and cytotoxic activities of RNase 3 members. This work provides unique insights into mutational and evolutionary pathways governing structure, function, and conformational states within the eosinophil RNase subfamily, offering potential for targeted modulation of RNase-associated functions.

Ancestral sequence reconstruction dissects structural and functional differences among eosinophil ribonucleases.,Tran TTQ, Narayanan C, Loes AN, Click TH, Pham NTH, Letourneau M, Harms MJ, Calmettes C, Agarwal PK, Doucet N J Biol Chem. 2024 Apr 7;300(5):107280. doi: 10.1016/j.jbc.2024.107280. PMID:38588810<ref>PMID:38588810</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7ty1" style="background-color:#fffaf0;"></div>

==See Also==
*[[Ribonuclease 3D structures|Ribonuclease 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Macaca fascicularis]]
[[Category: Calmettes C]]
[[Category: Doucet N]]
[[Category: Pham NTH]]
[[Category: Tran TTQ]]