4D0K

Complex of Chaetomium thermophilum PAN2 (WD40-CS1) with PAN3 (C-term)

Summary for 4D0K

• Entry DOI: 10.2210/pdb4d0k/pdb
• Related: 4CZV 4CZW 4CZX 4CZY
• Descriptor: A-SPECIFIC RIBONUCLEASE SUBUNIT PAN2, PAB-DEPENDENT POLY(A)-SPECIFIC RIBONUCLEASE SUBUNIT PAN3-LIKE PROTEIN (3 entities in total)
• Functional Keywords: gene regulation, wd40 domain, c-terminal knob domain, deadenylation, mrna decay, pan2-pan3 complex
• Biological source: CHAETOMIUM THERMOPHILUM; More
• Total number of polymer chains: 3
• Total formula weight: 82441.18

Authors

Jonas, S.,Izaurralde, E.,Weichenrieder, O. (deposition date: 2014-04-28, release date: 2014-06-04, Last modification date: 2023-12-20)

Primary citation

Jonas, S.,Christie, M.,Peter, D.,Bhandari, D.,Loh, B.,Huntzinger, E.,Weichenrieder, O.,Izaurralde, E.
An Asymmetric Pan3 Dimer Recruits a Single Pan2 Exonuclease to Mediate Mrna Deadenylation and Decay.
Nat.Struct.Mol.Biol., 21:599-, 2014

PubMed Abstract: The PAN2-PAN3 complex functions in general and microRNA-mediated mRNA deadenylation. However, mechanistic insight into PAN2 and its complex with the asymmetric PAN3 dimer is lacking. Here, we describe crystal structures that show that Neurospora crassa PAN2 comprises two independent structural units: a C-terminal catalytic unit and an N-terminal assembly unit that engages in a bipartite interaction with PAN3 dimers. The catalytic unit contains the exonuclease domain in an intimate complex with a potentially modulatory ubiquitin-protease-like domain. The assembly unit contains a WD40 propeller connected to an adaptable linker. The propeller contacts the PAN3 C-terminal domain, whereas the linker reinforces the asymmetry of the PAN3 dimer and prevents the recruitment of a second PAN2 molecule. Functional data indicate an essential role for PAN3 in coordinating PAN2-mediated deadenylation with subsequent steps in mRNA decay, which lead to complete mRNA degradation.

PubMed: 24880343
DOI: 10.1038/NSMB.2837

Experimental method

X-RAY DIFFRACTION (1.89 Å)