Figure 3. NO-induced conformational changes of the full-length sGC heterodimer.
Changes in HD exchange kinetics induced by NO-binding in full length α1β1 sGC with noncyclizable GTP analog GPCPP. Peptide coverage from HDX-MS analysis is represented by bars overlaying primary sequence of α1 (left) and β1 (right) sGC. Peptides exhibiting significant NO-induced exchange rate changes are color-coded according to the scale bar. Peptides exchanging more rapidly upon NO-binding are colored in red hues, whereas peptides exchanging more slowly are in blue hues. Asterisks denote the results of two-tailed, unpaired Student’s t-tests. Peptides exhibiting non-significant or undetectable changes are colored gray.