1bw4 | pdb_00001bw4

THREE-DIMENSIONAL STRUCTURE IN SOLUTION OF BARWIN, A PROTEIN FROM BARLEY SEED

spinqualitylabelsall models 1bw4, 20 NMR models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1bw4 is a 1 chain structure with sequence from Barley. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [BARW_HORVU] May be involved in a defense mechanism. Probable plant lectin. Binds weakly a chitin analog. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The solution structure of a 125-residue basic protein, barwin, has been determined using 1H nuclear magnetic resonance spectroscopy. This protein is closely related to domains in proteins encoded by wound-induced genes in plants. Analysis of the 1H nuclear Overhauser spectrum revealed the assignment of more than 1400 nuclear Overhauser effects. Twenty structures were calculated based on 676 nontrivial distance restraints, 152 torsion angle restraints (92 phi, 56 chi 1, and 4 omega for proline), and stereospecific assignments of 38 chiral centers, using distance geometry, simulated annealing, and restrained energy minimization. None of the distance restraints was violated by more than 0.5 A in any of the 20 structures, and none of the torsion angle restraints was violated by more than 1 degree in any of the structures. The RMS difference between the calculated and target interproton distance restraints is 0.033 A, and the average atomic RMS differences between the 20 structures and their geometric average are 1.23 A for backbone atoms and 1.73 A for all heavy atoms. The dominating structural feature of the protein is a well-defined four-stranded antiparallel beta-sheet, two parallel beta-sheets packed antiparallel to each other and four short alpha-helices. The binding site of barwin to the tetramer N-acetylglucosamine has been qualitatively investigated, and the dissociation constant of the complex has been determined using one-dimensional 1H nuclear magnetic resonance spectroscopy. Three-dimensional structure in solution of barwin, a protein from barley seed.,Ludvigsen S, Poulsen FM Biochemistry. 1992 Sep 22;31(37):8783-9. PMID:1390665 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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