1NO4
Crystal Structure of the pre-assembly scaffolding protein gp7 from the double-stranded DNA bacteriophage phi29
Summary for 1NO4
Entry DOI | 10.2210/pdb1no4/pdb |
Related | 1NOH |
Descriptor | HEAD MORPHOGENESIS PROTEIN (2 entities in total) |
Functional Keywords | coiled-coil, viral protein |
Biological source | Bacillus phage phi29 |
Total number of polymer chains | 4 |
Total formula weight | 44661.44 |
Authors | Morais, M.C.,Kanamaru, S.,Badasso, M.O.,Koti, J.S.,Owen, B.A.L.,McMurray, C.T.,Anderson, D.L.,Rossmann, M.G. (deposition date: 2003-01-15, release date: 2003-07-01, Last modification date: 2024-02-14) |
Primary citation | Morais, M.C.,Kanamaru, S.,Badasso, M.O.,Koti, J.S.,Owen, B.A.L.,McMurray, C.T.,Anderson, D.L.,Rossmann, M.G. Bacteriophage f29 scaffolding protein gp7 before and after prohead assembly Nat.Struct.Biol., 10:572-576, 2003 Cited by PubMed Abstract: Three-dimensional structures of the double-stranded DNA bacteriophage phi29 scaffolding protein (gp7) before and after prohead assembly have been determined at resolutions of 2.2 and 2.8 A, respectively. Both structures are dimers that resemble arrows, with a four-helix bundle composing the arrowhead and a coiled coil forming the tail. The structural resemblance of gp7 to the yeast transcription factor GCN4 suggests a DNA-binding function that was confirmed by native gel electrophoresis. DNA binding to gp7 may have a role in mediating the structural transition from prohead to mature virus and scaffold release. A cryo-EM analysis indicates that gp7 is arranged inside the capsid as a series of concentric shells. The position of the higher density features in these shells correlates with the positions of hexamers in the equatorial region of the capsid, suggesting that gp7 may regulate formation of the prolate head through interactions with these hexamers. PubMed: 12778115DOI: 10.1038/nsb939 PDB entries with the same primary citation |
Experimental method | X-RAY DIFFRACTION (2.2 Å) |
Structure validation
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