View source for 5tyi


==Grb7 SH2 with bicyclic peptide containing pY mimetic==
<StructureSection load='5tyi' size='340' side='right'caption='[[5tyi]], [[Resolution|resolution]] 2.15&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5tyi]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5TYI OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5TYI 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]] 2.15&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=48V:{[(2R)-2,3-DIAMINO-3-OXOPROPYL]SULFANYL}ACETIC+ACID'>48V</scene>, <scene name='pdbligand=99Y:4-carboxy-D-phenylalanine'>99Y</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=5tyi FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5tyi OCA], [https://pdbe.org/5tyi PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5tyi RCSB], [https://www.ebi.ac.uk/pdbsum/5tyi PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5tyi ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/GRB7_HUMAN GRB7_HUMAN] Adapter protein that interacts with the cytoplasmic domain of numerous receptor kinases and modulates down-stream signaling. Promotes activation of down-stream protein kinases, including STAT3, AKT1, MAPK1 and/or MAPK3. Promotes activation of HRAS. Plays a role in signal transduction in response to EGF. Plays a role in the regulation of cell proliferation and cell migration. Plays a role in the assembly and stability of RNA stress granules. Binds to the 5'UTR of target mRNA molecules and represses translation of target mRNA species, when not phosphorylated. Phosphorylation impairs RNA binding and promotes stress granule disassembly during recovery after cellular stress (By similarity).<ref>PMID:10893408</ref> <ref>PMID:12021278</ref> <ref>PMID:12223469</ref> <ref>PMID:20622016</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Grb7 is a signaling protein with critical roles in tumor cell proliferation and migration and an established cancer therapeutic target. Here we explore chemical space to develop a new bicyclic peptide inhibitor, incorporating thioether and lactam linkers that binds with affinity (KD = 1.1 muM) and specificity to the Grb7-SH2 domain. Structural analysis of the Grb7-SH2/peptide complex revealed an unexpected binding orientation underlying the binding selectivity by this new scaffold. We further incorporated carboxymethylphenylalanine and carboxyphenylalanine phosphotyrosine mimetics and arrived at an optimized inhibitor that potently binds Grb7-SH2 (KD = 0.13 muM) under physiological conditions. X-ray crystal structures of these Grb7-SH2/peptide complexes reveal the structural basis for the most potent and specific inhibitors of Grb7 developed to date. Finally, we demonstrate that cell permeable versions of these peptides successfully block Grb7 mediated interactions in a breast cancer cell line, establishing the potential of these peptides in the development of novel therapeutics targeted to Grb7.

Discovery, Development, and Cellular Delivery of Potent and Selective Bicyclic Peptide Inhibitors of Grb7 Cancer Target.,Watson GM, Kulkarni K, Sang J, Ma X, Gunzburg MJ, Perlmutter P, Wilce MCJ, Wilce JA J Med Chem. 2017 Nov 22;60(22):9349-9359. doi: 10.1021/acs.jmedchem.7b01320. Epub, 2017 Nov 10. PMID:29083893<ref>PMID:29083893</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5tyi" style="background-color:#fffaf0;"></div>

==See Also==
*[[Growth factor receptor-bound proteins 3D structures|Growth factor receptor-bound proteins 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Synthetic construct]]
[[Category: Watson GM]]
[[Category: Wilce JA]]
[[Category: Wilce MCJ]]