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...

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...

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...

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...

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...

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...

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

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...

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

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

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

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...

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...

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...

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...

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...

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...

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...

a mechanism for conformational change was proposed in which a four-helix bundle composed of TMs 1, 2, 6 and 7 changes its orientation within the rest...

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...

of apoE indicates that the protein forms an unusually elongated four-helix bundle that may be stabilised by a tightly packed hydrophobic core that includes...

most common tertiary structures of these proteins are transmembrane helix bundle and beta barrel. The portion of the membrane proteins that are attached...

four types: The four-α-helix bundle family (InterPro: IPR009079): member cytokines have three-dimensional structures with a bundle of four α-helices. This...

transmembrane topology. These proteins have one of two structural architectures: Helix bundle proteins, which are present in all types of biological membranes; Beta...