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1m6b, resolution 2.60Å ()
Ligands: , ,
Activity: Receptor protein-tyrosine kinase, with EC number
Resources: FirstGlance, OCA, RCSB, PDBsum
Coordinates: save as pdb, mmCIF, xml


Structure of the HER3 (ERBB3) Extracellular Domain

Publication Abstract from PubMed

We have determined the 2.6 angstrom crystal structure of the entire extracellular region of human HER3 (ErbB3), a member of the epidermal growth factor receptor (EGFR) family. The structure consists of four domains with structural homology to domains found in the type I insulin-like growth factor receptor. The HER3 structure reveals a contact between domains II and IV that constrains the relative orientations of ligand-binding domains and provides a structural basis for understanding both multiple-affinity forms of EGFRs and conformational changes induced in the receptor by ligand binding during signaling. These results also suggest new therapeutic approaches to modulating the behavior of members of the EGFR family.

Structure of the extracellular region of HER3 reveals an interdomain tether., Cho HS, Leahy DJ, Science. 2002 Aug 23;297(5585):1330-3. Epub 2002 Aug 1. PMID:12154198

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.


[ERBB3_HUMAN] Defects in ERBB3 are the cause of lethal congenital contracture syndrome type 2 (LCCS2) [MIM:607598]; also called Israeli Bedouin multiple contracture syndrome type A. LCCS2 is an autosomal recessive neurogenic form of a neonatally lethal arthrogryposis that is associated with atrophy of the anterior horn of the spinal cord. The LCCS2 syndrome is characterized by multiple joint contractures, anterior horn atrophy in the spinal cord, and a unique feature of a markedly distended urinary bladder. The phenotype suggests a spinal cord neuropathic etiology.[1]


[ERBB3_HUMAN] Binds and is activated by neuregulins and NTAK.[2]

About this Structure

1m6b is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA.

See Also


  • Cho HS, Leahy DJ. Structure of the extracellular region of HER3 reveals an interdomain tether. Science. 2002 Aug 23;297(5585):1330-3. Epub 2002 Aug 1. PMID:12154198 doi:10.1126/science.1074611
  1. Narkis G, Ofir R, Manor E, Landau D, Elbedour K, Birk OS. Lethal congenital contractural syndrome type 2 (LCCS2) is caused by a mutation in ERBB3 (Her3), a modulator of the phosphatidylinositol-3-kinase/Akt pathway. Am J Hum Genet. 2007 Sep;81(3):589-95. Epub 2007 Jul 24. PMID:17701904 doi:S0002-9297(07)61355-X
  2. Kinugasa Y, Ishiguro H, Tokita Y, Oohira A, Ohmoto H, Higashiyama S. Neuroglycan C, a novel member of the neuregulin family. Biochem Biophys Res Commun. 2004 Sep 3;321(4):1045-9. PMID:15358134 doi:10.1016/j.bbrc.2004.07.066

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