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Structural basis of membrane budding by the nuclear egress complex of herpesviruses

Journal Article · · EMBO Journal
 [1];  [1]
  1. Department of Molecular Biology and Microbiology Tufts University School of Medicine Boston MA USA
Abstract

During nuclear egress, herpesvirus capsids bud at the inner nuclear membrane forming perinuclear viral particles that subsequently fuse with the outer nuclear membrane, releasing capsids into the cytoplasm. This unusual budding process is mediated by the nuclear egress complex ( NEC ) composed of two conserved viral proteins, UL 31 and UL 34. Earlier, we discovered that the herpesvirus nuclear egress complex ( NEC ) could bud synthetic membranes in vitro without the help of other proteins by forming a coat‐like hexagonal scaffold inside the budding membrane. To understand the structural basis of NEC ‐mediated membrane budding, we determined the crystal structures of the NEC from two herpesviruses. The hexagonal lattice observed in the NEC crystals recapitulates the honeycomb coats within the budded vesicles. Perturbation of the oligomeric interfaces through mutagenesis blocks budding in vitro confirming that NEC oligomerization into a honeycomb lattice drives budding. The structure represents the first atomic‐level view of an oligomeric array formed by a membrane‐deforming protein, making possible the dissection of its unique budding mechanism and the design of inhibitors to block it.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-06CH11357; AC02-98CH10886
OSTI ID:
1547119
Alternate ID(s):
OSTI ID: 1228112
Journal Information:
EMBO Journal, Journal Name: EMBO Journal Journal Issue: 23 Vol. 34; ISSN 0261-4189
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United Kingdom
Language:
English

References (53)

Dictionary of protein secondary structure: Pattern recognition of hydrogen-bonded and geometrical features journal December 1983
GHKL, an emergent ATPase/kinase superfamily journal January 2000
A cell free protein fragment complementation assay for monitoring the core interaction of the human cytomegalovirus nuclear egress complex journal July 2012
Protein production by auto-induction in high-density shaking cultures journal May 2005
Herpesvirus assembly: An update journal August 2009
An atypical topoisomerase II from archaea with implications for meiotic recombination journal March 1997
Endocytic tubules regulated by Rab GTPases 5 and 11 are used for envelopment of herpes simplex virus: HSV1 envelopment by endocytic membranes journal September 2012
Structure of the immature HIV-1 capsid in intact virus particles at 8.8 Å resolution journal November 2014
Membrane deformation and scission by the HSV-1 nuclear egress complex journal June 2014
NIH Image to ImageJ: 25 years of image analysis journal June 2012
Herpesviruses remodel host membranes for virus egress journal April 2011
Vesicle formation from the nuclear membrane is induced by coexpression of two conserved herpesvirus proteins journal April 2007
Structure and assembly of immature HIV journal June 2009
Selection of HSV capsids for envelopment involves interaction between capsid surface components pUL31, pUL17, and pUL25 journal August 2011
Structure of a herpesvirus nuclear egress complex subunit reveals an interaction groove that is essential for viral replication journal July 2015
Electrostatics of nanosystems: Application to microtubules and the ribosome journal August 2001
Specific Residues of a Conserved Domain in the N Terminus of the Human Cytomegalovirus pUL50 Protein Determine Its Intranuclear Interaction with pUL53 journal May 2012
A Single Herpesvirus Protein Can Mediate Vesicle Formation in the Nuclear Envelope journal January 2015
Deep-etch EM reveals that the early poxvirus envelope is a single membrane bilayer stabilized by a geodetic “honeycomb” surface coat journal April 2005
MolProbity: all-atom contacts and structure validation for proteins and nucleic acids journal May 2007
Dali server: conservation mapping in 3D journal May 2010
The UL34 gene product of herpes simplex virus type 2 is a tail-anchored type II membrane protein that is significant for virus envelopment journal October 2000
HKL2MAP : a graphical user interface for macromolecular phasing with SHELX programs journal September 2004
Phaser crystallographic software journal July 2007
Secondary-structure matching (SSM), a new tool for fast protein structure alignment in three dimensions journal November 2004
Experimental phasing with SHELXC / D / E : combining chain tracing with density modification journal March 2010
XDS journal January 2010
PHENIX: a comprehensive Python-based system for macromolecular structure solution journal January 2010
Features and development of Coot journal March 2010
The way out: what we know and do not know about herpesvirus nuclear egress: Herpesvirus nuclear egress journal November 2012
Mapping of Sequences in Pseudorabies Virus pUL34 That Are Required for Formation and Function of the Nuclear Egress Complex journal February 2013
Phosphorylation of the UL31 Protein of Herpes Simplex Virus 1 by the US3-Encoded Kinase Regulates Localization of the Nuclear Envelopment Complex and Egress of Nucleocapsids journal March 2009
Identification of Conserved Amino Acids in pUL34 Which Are Critical for Function of the Pseudorabies Virus Nuclear Egress Complex journal March 2014
Nuclear Envelope Breakdown Can Substitute for Primary Envelopment-Mediated Nuclear Egress of Herpesviruses journal June 2011
Analysis of a Charge Cluster Mutation of Herpes Simplex Virus Type 1 UL34 and Its Extragenic Suppressor Suggests a Novel Interaction between pUL34 and pUL31 That Is Necessary for Membrane Curvature around Capsids journal January 2010
Biochemical, Biophysical, and Mutational Analyses of Subunit Interactions of the Human Cytomegalovirus Nuclear Egress Complex journal January 2009
The Great (Nuclear) Escape: New Insights into the Role of the Nuclear Egress Complex of Herpesviruses journal June 2015
Functional Characterization of Nuclear Trafficking Signals in Pseudorabies Virus pUL31 journal December 2014
Association of Herpes Simplex Virus pUL31 with Capsid Vertices and Components of the Capsid Vertex-Specific Complex journal January 2014
Interactions of the Kaposi's Sarcoma-Associated Herpesvirus Nuclear Egress Complex: ORF69 Is a Potent Factor for Remodeling Cellular Membranes journal January 2013
Reconstitution of the Kaposi's Sarcoma-Associated Herpesvirus Nuclear Egress Complex and Formation of Nuclear Membrane Vesicles by Coexpression of ORF67 and ORF69 Gene Products journal October 2011
Herpes Simplex Virus Type 1 UL34 Gene Product Is Required for Viral Envelopment journal January 2000
Herpes Simplex Virus Nucleocapsids Mature to Progeny Virions by an Envelopment   Deenvelopment   Reenvelopment Pathway journal June 2001
The Interacting UL31 and UL34 Gene Products of Pseudorabies Virus Are Involved in Egress from the Host-Cell Nucleus and Represent Components of Primary Enveloped but Not Mature Virions journal January 2002
Ultrastructural Localization of the Herpes Simplex Virus Type 1 UL31, UL34, and US3 Proteins Suggests Specific Roles in Primary Envelopment and Egress of Nucleocapsids journal September 2002
Effects of Charged Cluster Mutations on the Function of Herpes Simplex Virus Type 1 UL34 Protein journal July 2003
Comprehensive Mutational Analysis of a Herpesvirus Gene in the Viral Genome Context Reveals a Region Essential for Virus Replication journal July 2004
Identification of an Essential Domain in the Herpes Simplex Virus 1 UL34 Protein That Is Necessary and Sufficient To Interact with UL31 Protein journal February 2005
The product of the UL31 gene of herpes simplex virus 1 is a nuclear phosphoprotein which partitions with the nuclear matrix. journal January 1993
Membrane Remodeling by the Double-Barrel Scaffolding Protein of Poxvirus journal September 2011
The Herpes Simplex Virus Protein pUL31 Escorts Nucleocapsids to Sites of Nuclear Egress, a Process Coordinated by Its N-Terminal Domain journal June 2015
Unexpected features and mechanism of heterodimer formation of a herpesvirus nuclear egress complex journal October 2015
Collaboration gets the most out of software journal September 2013

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