title: Orthogonal beta beta motifs in proteins.
abstract: A super-secondary structural motif comprising two orthogonally oriented beta-strands connected by short linking segments of less than or equal to 5 residues has been identified from a data set of 65 independent protein crystal structures. Of the 42 examples from 14 proteins, a vast majority have only a single residue as the linking element. Analysis of the conformational angles at the junction reveals that the recently described type VIII beta-turn occurs frequently at the connecting hinge, while the type II beta-turn is also fairly common.
authors.affiliation: Molecular Biophysics Unit, Indian Institute of Science, Bangalore.
authors.forename: R
authors.initials: R
authors.lastname: Sowdhamini
authors.forename: N
authors.initials: N
authors.lastname: Srinivasan
authors.forename: C
authors.initials: C
authors.lastname: Ramakrishnan
authors.forename: P
authors.initials: P
authors.lastname: Balaram
mesh_terms: D000818:Animals; D003461:Crystallography; D015394:Molecular Structure; D011487:Protein Conformation; D011506:Proteins / Q000737:chemistry / Q000648:ultrastructure*
chemical_list: D011506:Proteins