3TQ2

Merohedral twinning in protein crystals revealed a new synthetic three helix bundle motif

Summary for 3TQ2

• Entry DOI: 10.2210/pdb3tq2/pdb
• Related: 1KYC 1ZIJ 2WPY 3K7Z
• Descriptor: KE1, SULFATE ION (3 entities in total)
• Functional Keywords: parallel three helix bundle, de novo protein
• Biological source: Synthetic
• Total number of polymer chains: 1
• Total formula weight: 4082.97

Authors

Geremia, S.,De March, M. (deposition date: 2011-09-09, release date: 2012-09-26, Last modification date: 2024-04-03)

Primary citation

de March, M.,Hickey, N.,Geremia, S.
Analysis of the crystal structure of a parallel three-stranded coiled coil.
Proteins, 91:1254-1260, 2023

PubMed Abstract: Here, we present the crystal structure of the synthetic peptide KE1, which contains four K-coil heptads separated in the middle by the QFLMLMF heptad. The structure determination reveals the presence of a canonical parallel three stranded coiled coil. The geometric characteristics of this structure are compared with other coiled coils with the same topology. Furthermore, for this topology, the analysis of the propensity of the single amino acid to occupy a specific position in the heptad sequence is reported. A number of viral proteins use specialized coiled coil tail needles to inject their genetic material into the host cells. The simplicity and regularity of the coiled coil arrangement made it an attractive system for de novo design of key molecules in drug delivery systems, vaccines, and therapeutics.

PubMed: 37501532
DOI: 10.1002/prot.26557

Experimental method

X-RAY DIFFRACTION (1.1 Å)