3sjd | pdb_00003sjd

Crystal structure of S. cerevisiae Get3 with bound ADP-Mg2+ in complex with Get2 cytosolic domain

spinqualitylabelsall models 3sjd, resolution 4.60Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3sjd is a 5 chain structure with sequence from Baker's yeast. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ADP, MG, ZN Related: 3sja, 3sjb, 3sjc Gene: GET3, ARR4, YDL100C, D2371 (Baker's yeast), GET2, HUR2, RMD7, YER083C (Baker's yeast) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [GET3_YEAST] ATPase required for the post-translational delivery of tail-anchored (TA) proteins to the endoplasmic reticulum. Recognizes and selectively binds the transmembrane domain of TA proteins in the cytosol. This complex then targets to the endoplasmic reticulum by membrane-bound receptors GET1 and GET2, where the tail-anchored protein is released for insertion. This process is regulated by ATP binding and hydrolysis. ATP binding drives the homodimer towards the closed dimer state, facilitating recognition of newly synthesized TA membrane proteins. ATP hydrolysis is required for insertion. Subsequently, the homodimer reverts towards the open dimer state, lowering its affinity for the GET1-GET2 receptor, and returning it to the cytosol to initiate a new round of targeting. Cooperates with the HDEL receptor ERD2 to mediate the ATP-dependent retrieval of resident ER proteins that contain a C-terminal H-D-E-L retention signal from the Golgi to the ER. Involved in low-level resistance to the oxyanions arsenite and arsenate, and in heat tolerance. [GET2_YEAST] Required for the post-translational delivery of tail-anchored (TA) proteins to the endoplasmic reticulum. Together with GET1, acts as a membrane receptor for soluble GET3, which recognizes and selectively binds the transmembrane domain of TA proteins in the cytosol. The GET complex cooperates with the HDEL receptor ERD2 to mediate the ATP-dependent retrieval of resident ER proteins that contain a C-terminal H-D-E-L retention signal from the Golgi to the ER. Involved in DNA replication and DNA damage response and also in cell wall function.[HAMAP-Rule:MF_03114] Publication Abstract from PubMed Tail-anchored (TA) proteins are involved in cellular processes including trafficking, degradation, and apoptosis. They contain a C-terminal membrane anchor and are posttranslationally delivered to the endoplasmic reticulum membrane by the Get3 adenosine triphosphatase interacting with the heterooligomeric Get1/2 receptor. We have determined crystal structures of Get3 in complex with the cytosolic domains of Get1 and Get2 in different functional states at 3.0, 3.2, and 4.6 angstrom resolution. The structural data, together with biochemical experiments, show that Get1 and Get2 use adjacent, partially overlapping binding sites and that both can bind simultaneously to Get3. Docking to the Get1/2 complex allows for conformational changes in Get3 that are required for TA protein insertion. These data suggest a molecular mechanism for nucleotide-regulated delivery of TA proteins. Structural Basis for Tail-Anchored Membrane Protein Biogenesis by the Get3-Receptor Complex.,Stefer S, Reitz S, Wang F, Wild K, Pang YY, Schwarz D, Bomke J, Hein C, Lohr F, Bernhard F, Denic V, Dotsch V, Sinning I Science. 2011 Jun 30. PMID:21719644 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also ATPase 3D structures

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