The calcium-binding epidermal growth factor-like (cbEGF) domain is a common structural motif in extracellular and transmembrane proteins. K(d) values for Ca2+ vary from the millimolar to nanomolar range; however the molecular basis for this variation is poorly understood. We have measured K(d) values for six fibrillin-1 cbEGF domains, each preceded by a transforming growth factor beta-binding protein-like (TB) domain. Using NMR and titration with chromophoric chelators, we found that K(d) val...Expand abstract
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Ca2+-dependent interface formation in fibrillin-1.
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