1n8z
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(New page: 200px<br /> <applet load="1n8z" size="450" color="white" frame="true" align="right" spinBox="true" caption="1n8z, resolution 2.52Å" /> '''Crystal structure o...)
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Revision as of 16:12, 12 November 2007
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Crystal structure of extracellular domain of human HER2 complexed with Herceptin Fab
Contents |
Overview
HER2 (also known as Neu, ErbB2) is a member of the epidermal growth factor, receptor (EGFR; also known as ErbB) family of receptor tyrosine kinases, which in humans includes HER1 (EGFR, ERBB1), HER2, HER3 (ERBB3) and HER4, (ERBB4). ErbB receptors are essential mediators of cell proliferation and, differentiation in the developing embryo and in adult tissues, and their, inappropriate activation is associated with the development and severity, of many cancers. Overexpression of HER2 is found in 20-30% of human breast, cancers, and correlates with more aggressive tumours and a poorer, prognosis. Anticancer therapies targeting ErbB receptors have shown, promise, and a monoclonal antibody against HER2, Herceptin (also known as, trastuzumab), is currently in use as a treatment for breast cancer. Here, we report crystal structures of the entire extracellular regions of rat, HER2 at 2.4 A and human HER2 complexed with the Herceptin antigen-binding, fragment (Fab) at 2.5 A. These structures reveal a fixed conformation for, HER2 that resembles a ligand-activated state, and show HER2 poised to, interact with other ErbB receptors in the absence of direct ligand, binding. Herceptin binds to the juxtamembrane region of HER2, identifying, this site as a target for anticancer therapies.
Disease
Known diseases associated with this structure: Adenocarcinoma of lung, somatic OMIM:[164870], Gastric cancer, somatic OMIM:[164870], Glioblastoma, somatic OMIM:[164870], Ovarian cancer, somatic, OMIM:[164870], Sialidosis, type I OMIM:[608272], Sialidosis, type II OMIM:[608272]
About this Structure
1N8Z is a Single protein structure of sequence from Homo sapiens with NAG and SO4 as ligands. Active as Transferase, with EC number and 2.7.10.2 2.7.10.1 and 2.7.10.2 Full crystallographic information is available from OCA.
Reference
Structure of the extracellular region of HER2 alone and in complex with the Herceptin Fab., Cho HS, Mason K, Ramyar KX, Stanley AM, Gabelli SB, Denney DW Jr, Leahy DJ, Nature. 2003 Feb 13;421(6924):756-60. PMID:12610629
Page seeded by OCA on Mon Nov 12 18:19:17 2007
