Document Detail


Stopped-flow, classical, and dynamic light scattering analysis of matrix protein binding to nucleocapsids of vesicular stomatitis virus.
MedLine Citation:
PMID:  8639598     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
During the process of assembly of enveloped viruses, binding of the nucleoprotein core of the virus (nucleocapsid) to the host membrane is mediated by the viral matrix (M) protein. Light scattering properties of vesicular stomatitis virus (VSV) nucleocapsids and nucleocapsid-M protein (NCM) complexes assembled in vivo were determined following solubilizaton of the virion envelope with detergents at varying ionic strength to vary the extent of M protein binding. Three factors were found to contribute to the light scattering properties of VSV nucleocapsids: their conformation, extent of self-association, and amount of bound M protein. All three were affected by changes in ionic strength but could be distinguished by several parameters. Conformational changes in nucleocapsids and NCM complexes occurred rapidly (millisecond time scale) upon changing salt concentration and were reflected in changes in the angular dependence of light scattering intensity (i.e., changes in radius of gyration, RG). Changes in extent of self-association occurred relatively slowly (seconds to minutes time scale) and could be distinguished by the concentration dependence of the apparent molecular mass and diffusion coefficient of the NCM complex. Changes in M protein binding occurred on an intermediate time scale (t1/2 approximately one s) and reflected changes in both molecular mass and RG. The data presented here provide criteria for assessing binding of M protein to nucleocapsids under conditions of minimal perturbation of the NCM complex assembled in vivo and at low protein concentrations so that self-association of the NCM complex was minimal and reversible.
Authors:
D S Lyles; M O McKenzie; R R Hantgan
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Biochemistry     Volume:  35     ISSN:  0006-2960     ISO Abbreviation:  Biochemistry     Publication Date:  1996 May 
Date Detail:
Created Date:  1996-07-15     Completed Date:  1996-07-15     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0370623     Medline TA:  Biochemistry     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  6508-18     Citation Subset:  IM    
Affiliation:
Department of Microbiology and Immunology, Bowman Gray School of Medicine of Wake Forest University, Winston-Salem, North Carolina 27157-11064, USA.
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MeSH Terms
Descriptor/Qualifier:
Animals
Capsid / chemistry*,  metabolism
Cell Line
Cricetinae
Kinetics
Light
Macromolecular Substances
Molecular Weight
Protein Binding
Protein Conformation
Scattering, Radiation
Sodium Chloride
Vesicular stomatitis Indiana virus / chemistry*,  growth & development,  metabolism
Viral Matrix Proteins / chemistry*,  metabolism
Grant Support
ID/Acronym/Agency:
AI15892/AI/NIAID NIH HHS
Chemical
Reg. No./Substance:
0/Macromolecular Substances; 0/Viral Matrix Proteins; 7647-14-5/Sodium Chloride

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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