A DESIGNED FOUR HELIX BUNDLE PROTEIN.     DOI:10.2210/pdb4hb1/pdb

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Primary Citation       Molecular Description Hide Classification: Designed Helical Bundle Structure Weight: 11815.50   Molecule: DHP1 Polymer: 1 Type: polypeptide(L) Length: 108 Chains: A Other Details: DE NOVO DESIGN A 108 AMINO ACID PROTEIN WAS DESIGNED AND CONSTRUCTED FROM A REDUCED ALPHABET OF SEVEN AMINO ACIDS. THE 2.9 ANGSTROM CRYSTAL STRUCTURE CONFIRMS THAT THE PROTEIN IS A FOUR HELIX BUNDLE, AS IT WAS DESIGNED TO BE. THE COMPLETE 108 RESIDUE SEQUENCE IS PRESENTED ON SEQRES RECORDS BELOW. THE HELICES WERE CONNECTED BY LOOPS OF 3, 4, 3 GLYCINES, RESPECTIVELY. THE MOLECULE CONTAINS A CRYSTALLOGRAPHIC TW0-FOLD AXIS OF SYMMETRY THROUGH THE CENTER OF THE 4-HELIX BUNDLE. THIS UNUSUAL ARRANGEMENT IS DUE TO THE SYNTHETIC NATURE OF THE MOLECULE IN WHICH THE SAME SEQUENCE SEGMENTS REPEAT. THE SYMMETRY OPERATION REQUIRED TO GENERATE THE ENTIRE BUNDLE IS (-Y+1, -X+1, 1/3-Z) AND IS GIVEN IN REMARK 350 AS AN OPERATOR ON THE COORDINATES IN THIS ENTRY.       Source Hide Polymer: 1 Scientific Name: Synthetic construct Expression System: Escherichia coli         Ligand Chemical Component Hide Identifier Name Formula Interaction View Links UNX     UNKNOWN ATOM OR ION X Ligand Explorer       Derived Data Hide SCOP Classification v1.75 - (1 Domains) CATH Classification v3.2.0 - (1 Domains)     Reset Layout

Biological Assembly     More Images... View in Jmol Other Viewers close KiNG WebMol QuickPDB FirstGlance Kiosk SimpleViewer Protein Workshop Ligand Explorer Biological assembly assigned by authors         Deposition Summary Hide Authors:   Schafmeister, C.E.,   Laporte, S.L.,   Miercke, L.J.W.,   Stroud, R.M. Deposition:   1997-11-10 Release:   1998-03-04 Last Modified (REVDAT):   2009-02-24       Experimental Details Hide Method:   X-RAY DIFFRACTION Experimental Data:   Resolution[Å]: 2.90 R-Value: 0.234 (obs.) R-Free: 0.284 Space Group: P 64 2 2 Unit Cell:   Length [Å] Angles [°] a = 51.90 α = 90.00  b = 51.90 β = 90.00  c = 61.00 γ = 120.00