2QEP

Crystal structure of the D1 domain of PTPRN2 (IA2beta)

Summary for 2QEP

• Entry DOI: 10.2210/pdb2qep/pdb
• Related: 2I1Y
• Descriptor: Receptor-type tyrosine-protein phosphatase N2, CHLORIDE ION (3 entities in total)
• Functional Keywords: ptprn2, ptprp, phogrin, ia-2 beta, autoantigen, structural genomics, structural genomics consortium, sgc, hydrolase
• Biological source: Homo sapiens (human)
• Cellular location: Cytoplasmic vesicle, secretory vesicle membrane ; Single-pass type I membrane protein . IA-2beta60: Cytoplasmic vesicle, secretory vesicle membrane : Q92932
• Total number of polymer chains: 2
• Total formula weight: 69990.36

Authors

Ugochukwu, E.,Barr, A.,Alfano, I.,Berridge, G.,Burgess-Brown, N.,Das, S.,Fedorov, O.,King, O.,Niesen, F.,Watt, S.,Savitsky, P.,Salah, E.,Pike, A.C.W.,Bunkoczi, G.,von Delft, F.,Sundstrom, M.,Edwards, A.,Arrowsmith, C.H.,Weigelt, J.,Knapp, S.,Structural Genomics Consortium (SGC) (deposition date: 2007-06-26, release date: 2007-07-24, Last modification date: 2023-08-30)

Primary citation

Barr, A.J.,Ugochukwu, E.,Lee, W.H.,King, O.N.,Filippakopoulos, P.,Alfano, I.,Savitsky, P.,Burgess-Brown, N.A.,Muller, S.,Knapp, S.
Large-scale structural analysis of the classical human protein tyrosine phosphatome.
Cell(Cambridge,Mass.), 136:352-363, 2009

PubMed Abstract: Protein tyrosine phosphatases (PTPs) play a critical role in regulating cellular functions by selectively dephosphorylating their substrates. Here we present 22 human PTP crystal structures that, together with prior structural knowledge, enable a comprehensive analysis of the classical PTP family. Despite their largely conserved fold, surface properties of PTPs are strikingly diverse. A potential secondary substrate-binding pocket is frequently found in phosphatases, and this has implications for both substrate recognition and development of selective inhibitors. Structural comparison identified four diverse catalytic loop (WPD) conformations and suggested a mechanism for loop closure. Enzymatic assays revealed vast differences in PTP catalytic activity and identified PTPD1, PTPD2, and HDPTP as catalytically inert protein phosphatases. We propose a "head-to-toe" dimerization model for RPTPgamma/zeta that is distinct from the "inhibitory wedge" model and that provides a molecular basis for inhibitory regulation. This phosphatome resource gives an expanded insight into intrafamily PTP diversity, catalytic activity, substrate recognition, and autoregulatory self-association.

PubMed: 19167335
DOI: 10.1016/j.cell.2008.11.038

Experimental method

X-RAY DIFFRACTION (2.5 Å)