8ffj
From Proteopedia
(Difference between revisions)
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== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[8ffj]] is a 4 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=8FFJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8FFJ FirstGlance]. <br> | <table><tr><td colspan='2'>[[8ffj]] is a 4 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=8FFJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8FFJ FirstGlance]. <br> | ||
| - | </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=8ffj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8ffj OCA], [https://pdbe.org/8ffj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8ffj RCSB], [https://www.ebi.ac.uk/pdbsum/8ffj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8ffj ProSAT]</span></td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 7.5Å</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=8ffj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8ffj OCA], [https://pdbe.org/8ffj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8ffj RCSB], [https://www.ebi.ac.uk/pdbsum/8ffj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8ffj ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Disease == | == Disease == | ||
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== Function == | == Function == | ||
[https://www.uniprot.org/uniprot/ERBB2_HUMAN ERBB2_HUMAN] Protein tyrosine kinase that is part of several cell surface receptor complexes, but that apparently needs a coreceptor for ligand binding. Essential component of a neuregulin-receptor complex, although neuregulins do not interact with it alone. GP30 is a potential ligand for this receptor. Regulates outgrowth and stabilization of peripheral microtubules (MTs). Upon ERBB2 activation, the MEMO1-RHOA-DIAPH1 signaling pathway elicits the phosphorylation and thus the inhibition of GSK3B at cell membrane. This prevents the phosphorylation of APC and CLASP2, allowing its association with the cell membrane. In turn, membrane-bound APC allows the localization of MACF1 to the cell membrane, which is required for microtubule capture and stabilization.<ref>PMID:10358079</ref> <ref>PMID:15380516</ref> <ref>PMID:16794579</ref> <ref>PMID:19372587</ref> <ref>PMID:20937854</ref> <ref>PMID:21555369</ref> In the nucleus is involved in transcriptional regulation. Associates with the 5'-TCAAATTC-3' sequence in the PTGS2/COX-2 promoter and activates its transcription. Implicated in transcriptional activation of CDKN1A; the function involves STAT3 and SRC. Involved in the transcription of rRNA genes by RNA Pol I and enhances protein synthesis and cell growth.<ref>PMID:10358079</ref> <ref>PMID:15380516</ref> <ref>PMID:16794579</ref> <ref>PMID:19372587</ref> <ref>PMID:20937854</ref> <ref>PMID:21555369</ref> | [https://www.uniprot.org/uniprot/ERBB2_HUMAN ERBB2_HUMAN] Protein tyrosine kinase that is part of several cell surface receptor complexes, but that apparently needs a coreceptor for ligand binding. Essential component of a neuregulin-receptor complex, although neuregulins do not interact with it alone. GP30 is a potential ligand for this receptor. Regulates outgrowth and stabilization of peripheral microtubules (MTs). Upon ERBB2 activation, the MEMO1-RHOA-DIAPH1 signaling pathway elicits the phosphorylation and thus the inhibition of GSK3B at cell membrane. This prevents the phosphorylation of APC and CLASP2, allowing its association with the cell membrane. In turn, membrane-bound APC allows the localization of MACF1 to the cell membrane, which is required for microtubule capture and stabilization.<ref>PMID:10358079</ref> <ref>PMID:15380516</ref> <ref>PMID:16794579</ref> <ref>PMID:19372587</ref> <ref>PMID:20937854</ref> <ref>PMID:21555369</ref> In the nucleus is involved in transcriptional regulation. Associates with the 5'-TCAAATTC-3' sequence in the PTGS2/COX-2 promoter and activates its transcription. Implicated in transcriptional activation of CDKN1A; the function involves STAT3 and SRC. Involved in the transcription of rRNA genes by RNA Pol I and enhances protein synthesis and cell growth.<ref>PMID:10358079</ref> <ref>PMID:15380516</ref> <ref>PMID:16794579</ref> <ref>PMID:19372587</ref> <ref>PMID:20937854</ref> <ref>PMID:21555369</ref> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Human epidermal growth factor receptor 2 (HER2) is a receptor tyrosine kinase that plays an oncogenic role in breast, gastric and other solid tumors. However, anti-HER2 therapies are only currently approved for the treatment of breast and gastric/gastric esophageal junction cancers and treatment resistance remains a problem. Here, we engineer an anti-HER2 IgG1 bispecific, biparatopic antibody (Ab), zanidatamab, with unique and enhanced functionalities compared to both trastuzumab and the combination of trastuzumab plus pertuzumab (tras + pert). Zanidatamab binds adjacent HER2 molecules in trans and initiates distinct HER2 reorganization, as shown by polarized cell surface HER2 caps and large HER2 clusters, not observed with trastuzumab or tras + pert. Moreover, zanidatamab, but not trastuzumab nor tras + pert, elicit potent complement-dependent cytotoxicity (CDC) against high HER2-expressing tumor cells in vitro. Zanidatamab also mediates HER2 internalization and downregulation, inhibition of both cell signaling and tumor growth, antibody-dependent cellular cytotoxicity (ADCC) and phagocytosis (ADCP), and also shows superior in vivo antitumor activity compared to tras + pert in a HER2-expressing xenograft model. Collectively, we show that zanidatamab has multiple and distinct mechanisms of action derived from the structural effects of biparatopic HER2 engagement. | ||
| + | |||
| + | An anti-HER2 biparatopic antibody that induces unique HER2 clustering and complement-dependent cytotoxicity.,Weisser NE, Sanches M, Escobar-Cabrera E, O'Toole J, Whalen E, Chan PWY, Wickman G, Abraham L, Choi K, Harbourne B, Samiotakis A, Rojas AH, Volkers G, Wong J, Atkinson CE, Baardsnes J, Worrall LJ, Browman D, Smith EE, Baichoo P, Cheng CW, Guedia J, Kang S, Mukhopadhyay A, Newhook L, Ohrn A, Raghunatha P, Zago-Schmitt M, Schrag JD, Smith J, Zwierzchowski P, Scurll JM, Fung V, Black S, Strynadka NCJ, Gold MR, Presta LG, Ng G, Dixit S Nat Commun. 2023 Mar 13;14(1):1394. doi: 10.1038/s41467-023-37029-3. PMID:36914633<ref>PMID:36914633</ref> | ||
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| + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
| + | </div> | ||
| + | <div class="pdbe-citations 8ffj" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
Current revision
Structure of Zanidatamab bound to HER2
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