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| Morph of the lac repressor complexed with DNA showing the differences between non-specific binding (straight DNA) vs. specific recognition of the operator sequence (kinked DNA). Whether the binding kinks the DNA, or simply stabilizes a pre-existing kink, is unknown. Details. |
Non-polymerizable monomeric actin or AP-actin is an Sf9-expressed cytoplasmic actin harboring two point mutations that prevent the monomer from polymerizing into actin filaments. These mutations allow for the crystallization of actin without the use of specific toxins or actin-binding proteins that may influence the structure. The crystal structure of AP-actin has been solved for the ADP-bound form (PDB code 2HF4) and the ATP-bound form (PDB code 2HF3). These two structures are shown right as a morph between the two states.
Crystal structure of Monomeric Actin in its ATP-bound state
Mechanism
About this Structure
This is where I will add my text. 2hf4 is a 1 chain structure of Actin with sequence from Drosophila melanogaster. Full crystallographic information is available from OCA.
See Also
Reference
- Rould MA, Wan Q, Joel PB, Lowey S, Trybus KM. Crystal structures of expressed non-polymerizable monomeric actin in the ADP and ATP states. J Biol Chem. 2006 Oct 20;281(42):31909-19. Epub 2006 Aug 18. PMID:16920713 doi:M601973200
