A helix bundle is a small protein fold composed of several alpha helices that are usually nearly parallel or antiparallel to each other. Three-helix bundles...

An alpha helix (or α-helix) is a sequence of amino acids in a protein that are twisted into a coil (a helix). The alpha helix is the most common structural...

{\displaystyle \alpha } -helix bundle, where one α {\displaystyle \alpha } -helix is contributed by syntaxin 1, one α {\displaystyle \alpha } -helix by synaptobrevin...

Structurally, Rop is a homodimeric four-helix bundle protein formed by the antiparallel interaction of two helix-turn-helix monomers. The Rop protein's structure...

of a helix hairpin is unknown; however, a four helix bundle is composed of two helix hairpins, which have important ligand binding sites. A helix corner...

the C-terminus consisting of a fast and independently folding three-helix bundle that is stabilized by hydrophobic interactions. The headpiece domain...

crystallize bHLH proteins bound to E-boxes, demonstrating that the parallel 4-helix bundle motif loop orients the basic sequences to interact with specific nucleotides...

composed of five homologous Ig-binding domains that fold into a three-helix bundle. Each domain is able to bind proteins from many mammalian species, most...

major capsid protein (MCP) that contains the SIRV2 fold, a type of alpha-helix bundle containing four helices. The virion consists of the genome encased in...

Dutton PL (1998). "A designed cavity in the hydrophobic core of a four-α-helix bundle improves volatile anesthetic binding affinity". Biochemistry. 37 (5):...

as an alpha helix and exists as an uncoiled strand. Helices that cover the inner membrane line the channel. These also form a 6 helix bundle that signifies...

parallel 4 helix bundle. This bundle marks the BamHI dimer interface, and it is thought that the dipole moments of the NH2-terminal atoms on this bundle may...

Robertson DE, DeGrado WF (1994-02-01). "Design of a heme-binding four-helix bundle". Journal of the American Chemical Society. 116 (3): 856–865. doi:10...

a six-helix bundle, a characteristic feature of the class I fusion proteins. The S2 region is also considered to include the transmembrane helix and C-terminal...

motif of approximately 45 amino acid residues. They fold into three-helix bundle structures. The human homologue of yeast Rad23A is one example of a nucleotide...

Helix-turn-helix is a DNA-binding domain (DBD). The helix-turn-helix (HTH) is a major structural motif capable of binding DNA. Each monomer incorporates...

their association with the vacuolar membrane. The helical bundle domain has a three helix bundle structure that holds four important histidines that are...

composed of alpha helices and lack disulfide bridges. The parent three-helix bundle structure is currently the fastest folding protein structure known. Specific...

and more recently the plakin family. The spectrin repeat forms a three-helix bundle. These conform to the rules of the heptad repeat. Spectrin repeats give...

four-helix bundle. Variations in osmolality trigger conformational changes in EnvZ which have been localized to the cytoplasmic four-helix bundle and which...

solved to atomic resolution, confirming the predicted long chain four helix bundle topology. Comparing this structure with the known structures of other...

fold, a type of alpha-helix bundle, and the MCPs of bicaudaviruses possess the ATV-like fold, another type of alpha-helix bundle. The architectural classes...

significantly steeper than other helical packings such as the helix bundle. The exact angle of helix packing depends on the sequence of the protein, because...

two different architectures, both composed of a four-helix bundle but differing in the way the bundle is assembled. Most structurally characterized HPt proteins...

of IL2 comprises a bundle of 4 helices (termed A-D), flanked by 2 shorter helices and several poorly defined loops. Residues in helix A, and in the loop...

The N-terminal region (residues 1–167) forms an anti-parallel four-helix bundle such that the non-polar sides face inside the protein. Meanwhile, the...

disulphide bonds. One half of the structure is dominated by a 4 alpha-helix bundle with a left-handed twist. The helices are anti-parallel, with 2 overhand...

hydroxyproline. Collagen folded into a triple helix is known as tropocollagen. Collagen triple helices are often bundled into fibrils which themselves form larger...

complex, two α-helices from each subunit come together to form a four-helix bundle. On the interacting helices are residues Glu144 and Arg145, which interact...

to form a tight, four-helix bundle in the heterodimer, whilst the third helix of each L27_2 domain forms another four-helix bundle that assembles the two...