ジャーナル: Nature / 年: 1994 タイトル: The crystal structure of the bacterial chaperonin GroEL at 2.8 A. 著者: K Braig / Z Otwinowski / R Hegde / D C Boisvert / A Joachimiak / A L Horwich / P B Sigler / 要旨: The crystal structure of Escherichia coli GroEL shows a porous cylinder of 14 subunits made of two nearly 7-fold rotationally symmetrical rings stacked back-to-back with dyad symmetry. The subunits ...The crystal structure of Escherichia coli GroEL shows a porous cylinder of 14 subunits made of two nearly 7-fold rotationally symmetrical rings stacked back-to-back with dyad symmetry. The subunits consist of three domains: a large equatorial domain that forms the foundation of the assembly at its waist and holds the rings together; a large loosely structured apical domain that forms the ends of the cylinder; and a small slender intermediate domain that connects the two, creating side windows. The three-dimensional structure places most of the mutationally defined functional sites on the channel walls and its outward invaginations, and at the ends of the cylinder.
MTRIX THE TRANSFORMATIONS PRESENTED ON MTRIX RECORDS BELOW DESCRIBE NON-CRYSTALLOGRAPHIC RELATIONSHIPS AMONG THE VARIOUS DOMAINS IN THIS ENTRY. APPLYING THE APPROPRIATE MTRIX TRANSFORMATION TO THE RESIDUES LISTED FIRST WILL YIELD APPROXIMATE COORDINATES FOR THE RESIDUES LISTED SECOND. APPLIED TO TRANSFORMED TO MTRIX RESIDUES RESIDUES RMSD M1 6 .. 523 ? 6 .. ? 523 M2 6 .. 523 ? 6 .. ? 523 M3 6 .. 523 ? 6 .. ? 523 M4 6 .. 523 ? 6 .. ? 523 M5 6 .. 523 ? 6 .. ? 523 M6 6 .. 523 ? 6 .. ? 523 THESE TRANSFORMATIONS WILL YIELD APPROXIMATE COORDINATES FOR ONE GROEL 7MER WHEN APPLIED TO THE MONOMER COORDINATES IN THIS ENTRY. THIS STRICT NON-CRYSTALLOGRAPHIC SYMMETRY WAS USED IN THE REFINEMENT.