4ddf
From Proteopedia
Computationally Designed Self-assembling Octahedral Cage protein, O333, Crystallized in space group P4
Structural highlights
Function[PDUT_SALTY] A minor shell protein of the bacterial microcompartment (BMC) dedicated to 1,2-propanediol (1,2-PD) degradation. The isolated BMC shell component protein ratio for J:A:B':B:K:T:U is approximately 15:10:7:6:1:1:2 (PubMed:12923081). Not required for structural integrity of BMCs nor to mitigate propionaldehyde toxicity, may selectively transport specific metabolites (PubMed:21239588). May be involved in electron transport across the BMC shell (Probable). Can be engineered to alter permeability of the BMC shell (PubMed:31674899).[1] [2] [3] [4] The 1,2-PD-specific bacterial microcompartment (BMC) concentrates low levels of 1,2-PD catabolic enzymes, concentrates volatile reaction intermediates thus enhancing pathway flux and keeps the level of toxic, mutagenic propionaldehyde low.[5] Publication Abstract from PubMedWe describe a general computational method for designing proteins that self-assemble to a desired symmetric architecture. Protein building blocks are docked together symmetrically to identify complementary packing arrangements, and low-energy protein-protein interfaces are then designed between the building blocks in order to drive self-assembly. We used trimeric protein building blocks to design a 24-subunit, 13-nm diameter complex with octahedral symmetry and a 12-subunit, 11-nm diameter complex with tetrahedral symmetry. The designed proteins assembled to the desired oligomeric states in solution, and the crystal structures of the complexes revealed that the resulting materials closely match the design models. The method can be used to design a wide variety of self-assembling protein nanomaterials. Computational design of self-assembling protein nanomaterials with atomic level accuracy.,King NP, Sheffler W, Sawaya MR, Vollmar BS, Sumida JP, Andre I, Gonen T, Yeates TO, Baker D Science. 2012 Jun 1;336(6085):1171-4. PMID:22654060[6] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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