3rfh

Crystal structure of the yeast RACK1 dimer in space group P21

spinqualitylabelsall models 3rfh, resolution 2.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3rfh is a 4 chain structure with sequence from Saccharomyces cerevisiae S288C. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.9Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function GBLP_YEAST Located at the head of the 40S ribosomal subunit in the vicinity of the mRNA exit channel, it serves as a scaffold protein that can recruit other proteins to the ribosome. Involved in the negative regulation of translation of a specific subset of proteins. Publication Abstract from PubMed Receptor for activated C-kinase 1 (RACK1) serves as a scaffolding protein in numerous signaling pathways involving kinases and membrane-bound receptors from different cellular compartments. It exists simultaneously as a cytosolic free form and as a ribosome-bound protein. As part of the 40S ribosomal subunit, it triggers translational regulation by establishing a direct link between protein kinase C and the protein synthesis machinery. It has been suggested that RACK1 could recruit other signaling molecules onto the ribosome, providing a signal-specific modulation of the translational process. RACK1 is able to dimerize both in vitro and in vivo. This homodimer formation has been observed in several processes including the regulation of the N-methyl-d-aspartate receptor by the Fyn kinase in the brain and the oxygen-independent degradation of hypoxia-inducible factor 1. The functional relevance of this dimerization is, however, still unclear and the question of a possible dimerization of the ribosome-bound protein is still pending. Here, we report the first structure of a RACK1 homodimer, as determined from two independent crystal forms of the Saccharomyces cerevisiae RACK1 protein (also known as Asc1p) at 2.9 and 3.9 A resolution. The structure reveals an atypical mode of dimerization where monomers intertwine on blade 4, thus exposing a novel surface of the protein to potential interacting partners. We discuss the significance of the dimer structure for RACK1 function. Structure of the RACK1 dimer from Saccharomyces cerevisiae.,Yatime L, Hein KL, Nilsson J, Nissen P J Mol Biol. 2011 Aug 12;411(2):486-98. Epub 2011 Jun 17. PMID:21704636 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also 3D sructureseceptor for activated protein kinase C 1

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