Structural Studies on the Empty Capsids of Physalis Mottle VirusKrishna, S.S., Sastri, M., Savithri, H.S., Murthy, M.R.N.
(2001) J.Mol.Biol. 307: 1035
- PubMed: 11286554
- DOI: 10.1006/jmbi.2001.4533
- PubMed Abstract:
- Identification of a Discrete Intermediate in the Assembly/Disassembly of Physalis Mottle Tymovirus Through Mutational Analysis
Sastri, M.,Reddy, S.,Krishna, S.S.,Murthy, M.R.N.,Savithri, H.S.
(1999) J.Mol.Biol. 289: 905
- Stability of Belladonna Mottle Virus Particles: The Role of Polyamines and Calcium
Savithri, H.S.,Munshi, S.K.,Suryanarayana, S.,Divakar, S.,Murthy, M.R.N.
(1987) J.Gen.Virol. 68: 1533
- Three Dimensional Structure of Physalis Movirus: Implications for the Viral Assembly
Krishna, S.S.,Hiremath, C.N.,Munshi, S.K.,Prahadeeswaran, D.,Sastri, M.,Savithri, H.S.,Murthy, M.R.N.
(1999) J.Mol.Biol. 289: 919
- Structure of Belladonna Mottle Virus: Cross-Rotation Function Studies with Southern Bean Mosaic Virus
Hiremath, C.N.,Munshi, S.K.,Murthy, M.R.N.
(1990) Acta Crystallogr.,Sect.B 46: 562
- Architecture of Physalis Mottle Tymovirus as Probed by Monoclonal Antibodies and Cross-Linking Studies
Kekuda, R.,Karande, A.A.,Jacob, A.N.K.,Savithri, H.S.
(1993) Virology 193: 959
- Assembly of Physalis Mottle Virus Capsid Protein in Escherichia Coli and the Role of Amino and Carboxy Termini in the Formation of the Icosahedral Particles
Sastri, M.,Kekuda, R.,Gopinath, K.,Kumar, C.T.R.,Jagath, J.R.,Savithri, H.S.
(1997) J.Mol.Biol. 272: 541
- Symmetry of Belladonna Mottle Virus: Rotation Function Studies
Munshi, S.K.,Hiremath, C.N.,Murthy, M.R.N.,Savithri, H.S.
(1987) Acta Crystallogr.,Sect.B 43: 376
- Primary Structure of Belladonna Mottle Virus Coat Protein
Suryanarayana, S.,Rao, N.A.,Murthy, M.R.N.,Savithri, H.S.
(1989) J.Biol.Chem. 264: 6273
The three-dimensional crystal structure of the empty capsid of Physalis mottle tymovirus has been determined to 3.2 A resolution. The empty capsids crystallized in the space group P1, leading to 60-fold non-crystallographic redundancy. The known stru ...
The three-dimensional crystal structure of the empty capsid of Physalis mottle tymovirus has been determined to 3.2 A resolution. The empty capsids crystallized in the space group P1, leading to 60-fold non-crystallographic redundancy. The known structure of Physalis mottle virus was used as a phasing model to initiate the structure determination by real-space electron-density averaging. The main differences between the structures of the native and the empty capsids were in residues 10 to 28 of the A-subunit, residues 1 to 9 of the B-subunit and residues 1 to 5 of the C-subunit, which are ordered only in the native virus particles. An analysis of the subunit disposition reveals that the virus has expanded radially outward by approximately 1.8 A in the empty particles. The A-subunits move in a direction that makes 10 degrees to the icosahedral 5-fold axes of symmetry. The B and C-subunits move along vectors making 12 degrees and 15 degrees to the quasi 6-fold axes. The quaternary organization of the pentameric and hexameric capsomeres are not altered significantly. However, the pentamer-hexamer contacts are reduced. Therefore, encapsidation of RNA appears to cause a reduction in the particle radius concomittant with the ordering of the N-terminal arm in the three subunits. These structural changes in Physalis mottle virus appear to be larger than the corresponding changes observed in viruses for which both the empty and full particle structures have been determined.
Molecular Biophysics Unit, Indian Institute of Science, Bangalore, 560 012, India.