Download MendeleyCalcium-induced structural changes and domain autonomy in calmodulin.
Finn, B.E., Evenas, J., Drakenberg, T., Waltho, J.P., Thulin, E., Forsen, S.(1995) Nat Struct Biol 2: 777-783
- PubMed: 7552749
- DOI: https://doi.org/10.1038/nsb0995-777
- Primary Citation of Related Structures:
1CMF, 1CMG - PubMed Abstract:
We have determined the solution structures of the apo and (Ca2+)2 forms of the carboxy-terminal domain of calmodulin using multidimensional heteronuclear nuclear magnetic resonance spectroscopy. The results show that both forms adopt well-defined structures with essentially equal secondary structure. A comparison of the structures of the two forms shows that Ca2+ binding causes major rearrangements of the secondary structure elements with changes in inter-residue distances of up to 15 A and exposure of the hydrophobic interior of the four-helix bundle. Comparisons with previously determined high-resolution X-ray structures and models of calmodulin indicate that this domain is structurally autonomous.
Organizational Affiliation:
Department of Physical Chemistry, Lund University, Sweden.
