1HGZ

Filamentous Bacteriophage PH75

PDB DOI: 10.2210/pdb1HGZ/pdb

Classification: VIRUS
Organism(s): Thermus phage PH75
Expression System: Thermus thermophilus HB8
Mutation(s): No
Membrane Protein: Yes OPM

Deposited: 2000-12-17 Released: 2001-06-01
Deposition Author(s): Pederson, D.M., Welsh, L.C., Marvin, D.A., Sampson, M., Perham, R.N., Yu, M., Slater, M.R.

Experimental Data Snapshot

Method: FIBER DIFFRACTION
Resolution: 2.40 Å
R-Value Free: 0.400
R-Value Work: 0.220

wwPDB Validation 3D Report Full Report

This is version 1.2 of the entry. See complete history.

Literature

The Protein Capsid of Filamentous Bacteriophage Ph75 from Thermus Thermophilus

Pederson, D.M., Welsh, L.C., Marvin, D.A., Sampson, M., Perham, R.N., Yu, M., Slater, M.R.

(2001) J Mol Biol 309: 401

PubMed: 11371161 Search on PubMed
DOI: 10.1006/jmbi.2001.4685
Primary Citation of Related Structures:
1HGV, 1HGZ, 1HH0

PubMed Abstract:

The PH75 strain of filamentous bacteriophage (Inovirus) grows in the thermophilic bacterium Thermus thermophilus at 70 degrees C. We have characterized the viral DNA and determined the amino acid sequence of the major coat protein, p8. The p8 protein is synthesized without a leader sequence, like that of bacteriophage Pf3 but unlike that of bacteriophage Pf1, both of which grow in the mesophile Pseudomonas aeruginosa. X-ray diffraction patterns from ordered fibres of the PH75 virion are similar to those from bacteriophages Pf1 and Pf3, indicating that the protein capsid of the PH75 virion has the same helix symmetry and subunit shape, even though the primary structures of the major coat proteins are quite different and the virions assemble at very different temperatures. We have used this information to build a molecular model of the PH75 protein capsid based on that of Pf1, and refined the model by simulated annealing, using fibre diffraction data extending to 2.4 A resolution in the meridional direction and to 3.1 A resolution in the equatorial direction. The common design may reflect a fundamental motif of alpha-helix packing, although differences exist in the DNA packaging and in the means of insertion of the major coat protein of these filamentous bacteriophages into the membrane of the host bacterial cell. These may reflect differences in the assembly mechanisms of the virions.

Related Citations:

The Molecular Structure and Structural Transition of the Alpha-Helical Capsid in Filamentous Bacteriophage Pf1
Welsh, L.C., Symmons, M.F., Marvin, D.A.
(2000) Acta Crystallogr D Biol Crystallogr 56: 137

Structure of the Capsid of Pf3 Filamentous Phage Determined from X-Ray Fibre Diffraction Data at 3.1 A Resolution
Welsh, L.C., Symmons, M.F., Sturtevant, J.M., Marvin, D.A., Perham, R.N.
(1998) J Mol Biol 283: 155

Pf1 Filamentous Bacteriophage: Refinement of a Molecular Model by Simulated Annealing Using 3.3 Angstroms Resolution X-Ray Fibre Diffraction Data
Gonzalez, A., Nave, C., Marvin, D.A.
(1995) Acta Crystallogr D Biol Crystallogr 51: 792

Model-Building Studies of Inovirus: Genetic Variations on a Geometric Theme
Marvin, D.A.
(1990) Int J Biol Macromol 12: 125

Organizational Affiliation:

Cambridge Centre for Molecular Recognition, Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge CB2 1GA, UK.

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PH75 INOVIRUS MAJOR COAT PROTEIN	A	46	Thermus phage PH75	Mutation(s): 0 Gene Names: VIII Membrane Entity: Yes
UniProt
Find proteins for P82889 (Thermus phage PH75) Explore P82889 Go to UniProtKB: P82889
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P82889
Protein Feature View Expand
Reference Sequence