Which of the common structural motifs are described wrongly?(a) β-hairpin – adjacent antiparallel strands(b) Greek key – 4 adjacent antiparallel strand(c) β-α-β – 2 parallel strands connected by helix(d) β-α-β – 2 antiparallel strands connected by helixI got this question in final exam.I want to ask this question from Protein Motifs and Domain Prediction topic in portion Sequence Alignment of Bioinformatics

Which of the common structural motifs are described wrongly?(a) β-hai

1.	Which of the common structural motifs are described wrongly?(a) β-hairpin – adjacent antiparallel strands(b) Greek key – 4 adjacent antiparallel strand(c) β-α-β – 2 parallel strands connected by helix(d) β-α-β – 2 antiparallel strands connected by helixI got this question in final exam.I want to ask this question from Protein Motifs and Domain Prediction topic in portion Sequence Alignment of Bioinformatics
Answer» Right choice is (d) β-α-β – 2 ANTIPARALLEL strands connected by HELIX To elaborate: In motif, two adjacent βparallel strands are connected by an α helix from the C-terminus of strand 1 to the N-terminus of strand. Most protein structures that CONTAIN parallel beta-sheets are built up from COMBINATIONS of such β-α-βmotifs.

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