13.01.2013 Views

Calcium-Binding Protein Protocols Calcium-Binding Protein Protocols

Calcium-Binding Protein Protocols Calcium-Binding Protein Protocols

Calcium-Binding Protein Protocols Calcium-Binding Protein Protocols

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Ca 2+ -<strong>Binding</strong> <strong>Protein</strong>s Using ESI-MS 169<br />

Fig. 1. (Deconvoluted spectra for (C) apo-CaM and (D) Ca 2+ -loaded CaM). The<br />

expected molecular weight for apo-CaM is 16,700 Da, while that for (Ca 2+ ) 4-CaM is<br />

16,852 Da.<br />

interactions with other molecules is readily attainable with small amounts of<br />

material. From the data presented here, we have shown that the tight-binding<br />

interaction between CaM and MLCK is readily observed in the gas phase and<br />

that Tr 2C binds MLCK more tightly than TR 1C. From our own studies, it is<br />

known that the observed relative ion intensities correlate well with solution<br />

binding constants for the system of CaM and CaM fragments interacting with<br />

target peptides. Thus, the detailed information obtained by ESI-MS studies

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!