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A hairpin is a special case of a turn, in which the direction of the protein backbone reverses and the flanking secondary structure elements interact. For example, the beta hairpin connects two hydrogen-bonded, antiparallel β-strands.
- Tertiary and Quaternary Structures
Table \(\PageIndex{1}\): pKa values of side chains in actual...
- Main Chain Conformations
The 310 helix, a sharper helix with 3 amino acids/turn,...
- Alpha Helix From Bacteriophage T4 Lysozyme (1Dyg)
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- PDB = 3Ua0
N-terminal part (domain) of the Bombyx mori fibroin silk...
- Pi Helix From beta-D-glucan Glucohydrolase (1X38)
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- TIM Barrel
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- 1Dpx
Expand/collapse global hierarchy Home Learning Objects...
- 3-10Helix From Dienelactone Hydrolase (1Din)
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- Tertiary and Quaternary Structures
15 maj 2024 · What is a stem-loop (hairpin loop)? A Stem-loop can be defined as a hairpin-like pattern formed because of the intramolecular base pairing of the nucleotide sequence (especially in palindromic sequence) within the same molecule.
11 sie 2024 · Beta-hairpin or beta-turn This motif is present in most antiparallel beta structures, both as an isolated ribbon and as part of beta sheets. Figure \(\PageIndex{8}\) shows an interactive iCn3D model of the beta hairpin from bovine pancreatic trypsin inhibitor (1k6u)
A hairpin turn (also hairpin bend or hairpin corner) is a bend in a road with a very acute inner angle, making it necessary for an oncoming vehicle to turn about 180° to continue on the road. It is named for its resemblance to a bent metal hairpin.
Hairpin structure is a pattern that can occur in single-stranded DNA or, more commonly, in RNA. The structure is also known as a stem-loop structure. It occurs when two regions of the same strand, usually complementary in nucleotide sequence when read in opposite directions, base-pair to form a double helix that ends in an unpaired loop.
A tight or hairpin turn, typically found in globular proteins, is shown in stereo. It contains amino acids 108–112 (ISGNE). The atoms are as in previous drawings: one circle, carbon; two nested circles, oxygen; three nested circles, nitrogen.
Hairpin structures occur in pre-microRNA structures and most famously in transfer RNA, which contain three true stem-loops and one stem that meet in a cloverleaf pattern. The anticodon that recognizes a W. Dubitzky et al. (eds.), Encyclopedia of Systems Biology, DOI 10.1007/978-1-4419-9863-7, # Springer Science+Business Media LLC 2013
