3NGK
PduA from Salmonella enterica Typhimurium
Summary for 3NGK
| Entry DOI | 10.2210/pdb3ngk/pdb |
| Descriptor | Propanediol utilization protein pduA (2 entities in total) |
| Functional Keywords | bmc shell protein, pdu, carboxysome, propanediol, unknown function |
| Biological source | Salmonella enterica subsp. enterica serovar Typhimurium |
| Total number of polymer chains | 1 |
| Total formula weight | 10591.19 |
| Authors | Crowley, C.S.,Cascio, D.,Sawaya, M.R.,Yeates, T.O. (deposition date: 2010-06-11, release date: 2010-10-06, Last modification date: 2023-09-06) |
| Primary citation | Crowley, C.S.,Cascio, D.,Sawaya, M.R.,Kopstein, J.S.,Bobik, T.A.,Yeates, T.O. Structural Insight into the Mechanisms of Transport across the Salmonella enterica Pdu Microcompartment Shell. J.Biol.Chem., 285:37838-37846, 2010 Cited by PubMed Abstract: Bacterial microcompartments are a functionally diverse group of proteinaceous organelles that confine specific reaction pathways in the cell within a thin protein-based shell. The propanediol utilizing (Pdu) microcompartment contains the reactions for metabolizing 1,2-propanediol in certain enteric bacteria, including Salmonella. The Pdu shell is assembled from a few thousand protein subunits of several different types. Here we report the crystal structures of two key shell proteins, PduA and PduT. The crystal structures offer insights into the mechanisms of Pdu microcompartment assembly and molecular transport across the shell. PduA forms a symmetric homohexamer whose central pore appears tailored for facilitating transport of the 1,2-propanediol substrate. PduT is a novel, tandem domain shell protein that assembles as a pseudohexameric homotrimer. Its structure reveals an unexpected site for binding an [Fe-S] cluster at the center of the PduT pore. The location of a metal redox cofactor in the pore of a shell protein suggests a novel mechanism for either transferring redox equivalents across the shell or for regenerating luminal [Fe-S] clusters. PubMed: 20870711DOI: 10.1074/jbc.M110.160580 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.2608 Å) |
Structure validation
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