5U4U
pseudoGTPase domain (pG1) of p190RhoGAP-A
Summary for 5U4U
| Entry DOI | 10.2210/pdb5u4u/pdb |
| Related | 5U4V |
| Descriptor | MGC81300 protein, MALONATE ION, SODIUM ION, ... (4 entities in total) |
| Functional Keywords | gtpase, pseudogtpase, g domain, rho, gap, arhgap5, arhgap35, hydrolase |
| Biological source | Xenopus laevis (African clawed frog) |
| Total number of polymer chains | 1 |
| Total formula weight | 20090.59 |
| Authors | Stiegler, A.L.,Boggon, T.J. (deposition date: 2016-12-06, release date: 2017-09-20, Last modification date: 2023-10-04) |
| Primary citation | Stiegler, A.L.,Boggon, T.J. p190RhoGAP proteins contain pseudoGTPase domains. Nat Commun, 8:506-506, 2017 Cited by PubMed Abstract: The two p190RhoGAP proteins, p190RhoGAP-A and -B, are key regulators of Rho GTPase signaling and are essential for actin cytoskeletal structure and contractility. Here we report the discovery of two evolutionarily conserved GTPase-like domains located in the 'middle domain', previously thought to be unstructured. Deletion of these domains reduces RhoGAP activity. Crystal structures, MANT-GTPγS binding, thermal denaturation, biochemical assays and sequence homology analysis all strongly support defects in nucleotide-binding activity. Analysis of p190RhoGAP proteins therefore indicates the presence of two previously unidentified domains which represent an emerging group of pseudoenzymes, the pseudoGTPases.A growing number of 'pseudoenzymes' with a regulatory role in signal transduction processes but without catalytic activity are being identified. Here, the authors identify two pseudoGTPase domains in p190RhoGAP, characterize them biochemically and structurally and show that they influence RhoGAP activity. PubMed: 28894085DOI: 10.1038/s41467-017-00483-x PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (1.9 Å) |
Structure validation
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