1Z2A
GDP-Bound Rab23 GTPase crystallized in P2(1)2(1)2(1) space group
Summary for 1Z2A
| Entry DOI | 10.2210/pdb1z2a/pdb |
| Descriptor | Ras-related protein Rab-23, MAGNESIUM ION, GUANOSINE-5'-DIPHOSPHATE, ... (4 entities in total) |
| Functional Keywords | rab gtpase, rab23, vesicular trafficking, protein transport |
| Biological source | Mus musculus (house mouse) |
| Cellular location | Cell membrane; Lipid-anchor; Cytoplasmic side (Potential): P35288 |
| Total number of polymer chains | 1 |
| Total formula weight | 19534.28 |
| Authors | Eathiraj, S.,Pan, X.,Ritacco, C.,Lambright, D.G. (deposition date: 2005-03-07, release date: 2005-07-26, Last modification date: 2024-04-03) |
| Primary citation | Eathiraj, S.,Pan, X.,Ritacco, C.,Lambright, D.G. Structural basis of family-wide Rab GTPase recognition by rabenosyn-5. Nature, 436:415-419, 2005 Cited by PubMed Abstract: Rab GTPases regulate all stages of membrane trafficking, including vesicle budding, cargo sorting, transport, tethering and fusion. In the inactive (GDP-bound) conformation, accessory factors facilitate the targeting of Rab GTPases to intracellular compartments. After nucleotide exchange to the active (GTP-bound) conformation, Rab GTPases interact with functionally diverse effectors including lipid kinases, motor proteins and tethering complexes. How effectors distinguish between homologous Rab GTPases represents an unresolved problem with respect to the specificity of vesicular trafficking. Using a structural proteomic approach, we have determined the specificity and structural basis underlying the interaction of the multivalent effector rabenosyn-5 with the Rab family. The results demonstrate that even the structurally similar effector domains in rabenosyn-5 can achieve highly selective recognition of distinct subsets of Rab GTPases exclusively through interactions with the switch and interswitch regions. The observed specificity is determined at a family-wide level by structural diversity in the active conformation, which governs the spatial disposition of critical conserved recognition determinants, and by a small number of both positive and negative sequence determinants that allow further discrimination between Rab GTPases with similar switch conformations. PubMed: 16034420DOI: 10.1038/nature03798 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (1.9 Å) |
Structure validation
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