View source for 5b0h


==CRYSTAL STRUCTURE OF HUMAN LEUKOCYTE CELL-DERIVED CHEMOTAXIN 2==
<StructureSection load='5b0h' size='340' side='right'caption='[[5b0h]], [[Resolution|resolution]] 1.94&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5b0h]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5B0H OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5B0H 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]] 1.94&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</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=5b0h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5b0h OCA], [https://pdbe.org/5b0h PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5b0h RCSB], [https://www.ebi.ac.uk/pdbsum/5b0h PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5b0h ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/LECT2_HUMAN LECT2_HUMAN] Has a neutrophil chemotactic activity. Also a positive regulator of chondrocyte proliferation.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Human leukocyte cell-derived chemotaxin 2 (LECT2), which is predominantly expressed in the liver, is a multifunctional protein. LECT2 is becoming a potential therapeutic target for several diseases of worldwide concern such as rheumatoid arthritis, hepatocellular carcinoma, and obesity. Here, we present the crystal structure of LECT2, the first mammalian protein whose structure contains an M23 metalloendopeptidase fold. The LECT2 structure adopts a conserved Zn(II) coordination configuration but lacks a proposed catalytic histidine residue, and its potential substrate-binding groove is blocked in the vicinity of the Zn(II)-binding site by an additional intrachain loop at the N terminus. Consistent with these structural features, LECT2 was found to be catalytically inactive as a metalloendopeptidase against various types of peptide sequences, including pentaglycine. In addition, a surface plasmon resonance analysis demonstrated that LECT2 bound to the c-Met receptor with micromolar affinity. These results indicate that LECT2 likely plays its critical roles by acting as a ligand for the corresponding protein receptors rather than as an enzymatically active peptidase. The intrachain loop together with the pseudo-active site groove in LECT2 structure may be specific for interactions between LECT2 and receptors. Our study reveals a mechanistic basis for the functional evolution of a mammalian protein with an M23 metalloendopeptidase fold and potentially broadens the implications for the biological importance of noncatalytic peptidases in the M23 family.

Crystal Structure of Human Leukocyte Cell-derived Chemotaxin 2 (LECT2) Reveals a Mechanistic Basis of Functional Evolution in a Mammalian Protein with an M23 Metalloendopeptidase Fold.,Zheng H, Miyakawa T, Sawano Y, Asano A, Okumura A, Yamagoe S, Tanokura M J Biol Chem. 2016 Aug 12;291(33):17133-42. doi: 10.1074/jbc.M116.720375. Epub, 2016 Jun 22. PMID:27334921<ref>PMID:27334921</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5b0h" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Miyakawa T]]
[[Category: Sawano Y]]
[[Category: Tanokura M]]
[[Category: Zheng H]]