2JAK

Human PP2A regulatory subunit B56g

Summary for 2JAK

• Entry DOI: 10.2210/pdb2jak/pdb
• Descriptor: SERINE/THREONINE-PROTEIN PHOSPHATASE 2A 56 KDA REGULATORY SUBUNIT GAMMA ISOFORM (2 entities in total)
• Functional Keywords: b56g, pp2a, ppp2r5c, phosphorylation, pp2a regulatory subunit, nuclear protein
• Biological source: HOMO SAPIENS (HUMAN)
• Cellular location: Nucleus: Q13362
• Total number of polymer chains: 1
• Total formula weight: 45859.86

Authors

Magnusdottir, A.,Stenmark, P.,Arrowsmith, C.,Berglund, H.,Busam, R.,Collins, R.,Edwards, A.,Ericsson, U.B.,Flodin, S.,Flores, A.,Graslund, S.,Hammarstrom, M.,Hallberg, B.M.,Holmberg Schiavone, L.,Hogbom, M.,Johansson, I.,Karlberg, T.,Kotenyova, T.,Lundgren, S.,Moche, M.,Nilsson, P.,Nyman, T.,Ogg, D.,Persson, C.,Sagemark, J.,Sundstrom, M.,Uppenberg, J.,Upsten, M.,Thorsell, A.G.,Van Den Berg, S.,Weigelt, J.,Nordlund, P. (deposition date: 2006-11-29, release date: 2006-12-04, Last modification date: 2024-05-08)

Primary citation

Magnusdottir, A.,Stenmark, P.,Flodin, S.,Nyman, T.,Kotenyova, T.,Graslund, S.,Ogg, D.,Nordlund, P.
The Structure of the Pp2A Regulatory Subunit B56 Gamma: The Remaining Piece of the Pp2A Jigsaw Puzzle.
Proteins, 74:212-, 2009

PubMed Abstract: The PP2A serine/threonine phosphatase regulates a plethora of cellular processes. In the cell the predominant form of the enzyme is a heterotrimer, formed by a core dimer composed of a catalytic and a scaffolding subunit, which assemble together with one of a range of different regulatory B subunits. Here, we present the first structure of a free non-complexed B subunit, B56 gamma. Comparison with the recent structures of a heterotrimeric complex and the core dimer reveals several significant conformational changes in the interface region between the B56 gamma and the core dimer. These allow for an assembly scheme of the PP2A holoenzyme to be put forth where B56 gamma first complexes with the scaffolding subunit and subsequently binds to the catalytic subunit and this induces the formation of a binding site for the invariant C-terminus of the catalytic subunit that locks in the complex as a last step of assembly.

PubMed: 18618707
DOI: 10.1002/PROT.22150

Experimental method

X-RAY DIFFRACTION (2.6 Å)