3n4w

Crystal structure of an abridged SER to ALA mutant of the mature ectodomain of the human receptor-type protein-tyrosine phosphatase ICA512/IA-2 at pH 7.5

spinqualitylabelsall models 3n4w, resolution 1.45Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3n4w is a 2 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CA Related: 2qt7, 3n0i Gene: ICA3, ICA512, PTPRN (HUMAN) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [PTPRN_HUMAN] Implicated in neuroendocrine secretory processes. May be involved in processes specific for neurosecretory granules, such as their biogenesis, trafficking or regulated exocytosis or may have a general role in neuroendocrine functions. Seems to lack intrinsic enzyme activity. May play a role in the regulation of secretory granules via its interaction with SNTB2. Publication Abstract from PubMed IA-2 (insulinoma-associated protein 2) is a protein-tyrosine phosphatase receptor located in secretory granules of neuroendocrine cells. Initially, it attracted attention due to its involvement in the autoimmune response associated to diabetes. Later it was found that upon exocytosis, the cytoplasmic domain of IA-2 is cleaved and relocated to the nucleus, where it enhances the transcription of the insulin gene. A concerted functioning of the whole receptor is to be expected. However, very little is known about the structure and function of the transmembrane and extracellular domains of IA-2. To address this issue, we solved the x-ray structure of the mature ectodomain of IA-2 (meIA-2) to 1.30A resolution. The fold of meIA-2 is related to the SEA (sea urchin sperm protein, enterokinase, agrin)) domains of mucins, suggesting its participation in adhesive contacts to the extracellular matrix and providing clues on how this kind of molecule may associate and form homo- and heterodimers. Moreover, we discovered that meIA-2 is self-proteolyzed in vitro by reactive oxygen species, suggesting the possibility of a new shedding mechanism that might be significant in normal function or pathological processes. Knowledge of meIA-2 structure should facilitate the search of its possible ligands and molecular interactions. Structure of the mature ectodomain of the human receptor-type protein-tyrosine phosphatase IA-2.,Primo ME, Klinke S, Sica MP, Goldbaum FA, Jakoncic J, Poskus E, Ermacora MR J Biol Chem. 2008 Feb 22;283(8):4674-81. Epub 2007 Nov 29. PMID:18048354 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

Proteopedia Page Contributors and Editors (what is this?)

OCA