Title : The Phe-Ile Zipper: A Specific Interaction Motif Drives Antiparallel Coiled-Coil Hexamer Formation.

Pub. Date : 2017 Oct 10

PMID : 28876052






5 Functional Relationships(s)
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1 A recently discovered antiparallel coiled-coil hexamer (ACC-Hex, peptide 1) exhibits a unique interaction in which Phe and Ile residues from adjacent alpha-helices interact to form a Phe-Ile zipper within the hydrophobic core. Phenylalanine hematopoietically expressed homeobox Homo sapiens
2 A recently discovered antiparallel coiled-coil hexamer (ACC-Hex, peptide 1) exhibits a unique interaction in which Phe and Ile residues from adjacent alpha-helices interact to form a Phe-Ile zipper within the hydrophobic core. Phenylalanine hematopoietically expressed homeobox Homo sapiens
3 Analysis of the X-ray crystallographic structure of ACC-Hex suggests that the stability of the six-helix bundle relies on specific interactions between the Phe and Ile residues. Phenylalanine hematopoietically expressed homeobox Homo sapiens
4 Using size exclusion chromatography and small-angle X-ray scattering, we found that the proper assembly of ACC-Hex from monomers is sensitive to subtle changes in side chain steric bulk and hydrophobicity introduced by mutations at the Phe and Ile residue positions. Phenylalanine hematopoietically expressed homeobox Homo sapiens
5 Finally, we expanded on the generality of the Phe-Ile zipper, creating a unique sequence that forms an antiparallel hexamer that is topologically similar to ACC-Hex but atomistically unique. Phenylalanine hematopoietically expressed homeobox Homo sapiens