3io3

From Proteopedia

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Template:STRUCTURE 3io3

Contents 1 GEt3 with ADP from D. Hansenii in Closed form 2 Function 3 About this Structure 4 Reference

GEt3 with ADP from D. Hansenii in Closed form

Template:ABSTRACT PUBMED 19956640

Function

[GET3_DEBHA] 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, 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 membrane-bound receptor, and returning it to the cytosol to initiate a new round of targeting (By similarity).

About this Structure

3io3 is a 1 chain structure with sequence from Debaryomyces hansenii. Full crystallographic information is available from OCA.

Reference

• Hu J, Li J, Qian X, Denic V, Sha B. The crystal structures of yeast Get3 suggest a mechanism for tail-anchored protein membrane insertion. PLoS One. 2009 Nov 30;4(11):e8061. PMID:19956640 doi:10.1371/journal.pone.0008061