4c57 | pdb_00004c57

Structure of GAK kinase in complex with a nanobody

spinqualitylabelsall models 4c57, resolution 2.55Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4c57 is a 4 chain structure with sequence from Homo sapiens and Lama glama. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.55Å Ligands: EDO, FEF, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function GAK_HUMAN Associates with cyclin G and CDK5. Seems to act as an auxilin homolog that is involved in the uncoating of clathrin-coated vesicles by Hsc70 in non-neuronal cells. Expression oscillates slightly during the cell cycle, peaking at G1. Publication Abstract from PubMed GAK (cyclin G-associated kinase) is a key regulator of clathrin-coated vesicle trafficking and plays a central role during development. Additionally, due to the unusually high plasticity of its catalytic domain, it is a frequent 'off-target' of clinical kinase inhibitors associated with respiratory side effects of these drugs. In the present paper, we determined the crystal structure of the GAK catalytic domain alone and in complex with specific single-chain antibodies (nanobodies). GAK is constitutively active and weakly associates in solution. The GAK apo structure revealed a dimeric inactive state of the catalytic domain mediated by an unusual activation segment interaction. Co-crystallization with the nanobody NbGAK_4 trapped GAK in a dimeric arrangement similar to the one observed in the apo structure, whereas NbGAK_1 captured the activation segment of monomeric GAK in a well-ordered conformation, representing features of the active kinase. The presented structural and biochemical data provide insight into the domain plasticity of GAK and demonstrate the utility of nanobodies to gain insight into conformational changes of dynamic molecules. In addition, we present structural data on the binding mode of ATP mimetic inhibitors and enzyme kinetic data, which will support rational inhibitor design of inhibitors to reduce the off-target effect on GAK. Structure of cyclin G-associated kinase (GAK) trapped in different conformations using nanobodies.,Chaikuad A, Keates T, Vincke C, Kaufholz M, Zenn M, Zimmermann B, Gutierrez C, Zhang RG, Hatzos-Skintges C, Joachimiak A, Muyldermans S, Herberg FW, Knapp S, Muller S Biochem J. 2014 Apr 1;459(1):59-69. doi: 10.1042/BJ20131399. PMID:24438162 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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