Both parallel and antiparallel alpha-helical coiled-coil dimers are common among proteins; however, biophysical scrutiny has focused almost entirely on parallel dimers. We describe the development of a model system that enables efficient and systematic analysis of hydrophobic packing between antiparallel alpha-helices. Our findings reveal significant differences in packing preferences between parallel and antiparallel coiled-coils.
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Hadley et al. (2006) studied this question.
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