5UOT | pdb_00005uot

CryoEM structure of the helical assembly of full length MxB

• PDB DOI: https://doi.org/10.2210/pdb5UOT/pdb
• EM Map EMD-8577: EMDB EMDataResource

• Classification: ANTIVIRAL PROTEIN
• Organism(s): Homo sapiens
• Expression System: Mammalia
• Mutation(s): No 


• Deposited: 2017-02-01 Released: 2018-02-21 
• Deposition Author(s): Perilla, J.R., Alvarez, F.J.D., Zhang, P., Schulten, K.
• Funding Organization(s): National Institutes of Health, Medical Research Council (United Kingdom), National Science Foundation

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 4.60 Å
• Aggregation State: HELICAL ARRAY 
• Reconstruction Method: HELICAL 

Starting Model: experimental

Literature

CryoEM structure of MxB reveals a novel oligomerization interface critical for HIV restriction.

Alvarez, F.J.D., He, S., Perilla, J.R., Jang, S., Schulten, K., Engelman, A.N., Scheres, S.H.W., Zhang, P.

(2017) Sci Adv 3: e1701264-e1701264

• PubMed: 28929138 
• DOI: https://doi.org/10.1126/sciadv.1701264
• Primary Citation Related Structures: 
  5UOT


• PubMed Abstract: 
  

  Human dynamin-like, interferon-induced myxovirus resistance 2 (Mx2 or MxB) is a potent HIV-1 inhibitor. Antiviral activity requires both the amino-terminal region of MxB and protein oligomerization, each of which has eluded structural determination due to difficulties in protein preparation. We report that maltose binding protein-fused, full-length wild-type MxB purifies as oligomers and further self-assembles into helical arrays in physiological salt. Guanosine triphosphate (GTP), but not guanosine diphosphate, binding results in array disassembly, whereas subsequent GTP hydrolysis allows its reformation. Using cryo-electron microscopy (cryoEM), we determined the MxB assembly structure at 4.6 Å resolution, representing the first near-atomic resolution structure in the mammalian dynamin superfamily. The structure revealed previously described and novel MxB assembly interfaces. Mutational analyses demonstrated a critical role for one of the novel interfaces in HIV-1 restriction.

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Organizational Affiliation: 
• Department of Structural Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15260, USA.
Pittsburgh Center for HIV Protein Interactions, University of Pittsburgh School of Medicine, Pittsburgh, PA 15260, USA.
MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK.
Department of Physics and Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Boston, MA 02215, USA.
Department of Medicine, Harvard Medical School, Boston, MA 02115, USA.
Division of Structural Biology, Henry Wellcome Building for Genomic Medicine, University of Oxford, Headington, Oxford OX3 7BN, UK.
Electron Bio-Imaging Centre, Diamond Light Source, Harwell Science and Innovation Campus, Didcot OX11 0DE, UK.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 62-mer - A62 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 4,400.74 kDa 
• Atom Count: 298,034 
• Modeled Residue Count: 36,952 
• Deposited Residue Count: 38,378 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Interferon-induced GTP-binding protein Mx2	A [auth 0], AA [auth q], AB [auth Q], B [auth 1], BA [auth r], BB [auth R], C [auth 2], CA [auth s], CB [auth S], D [auth 3], DA [auth t], DB [auth T], E [auth 4], EA [auth u], EB [auth U], F [auth 5], FA [auth v], FB [auth V], G [auth 6], GA [auth w], GB [auth W], H [auth 7], HA [auth x], HB [auth X], I [auth 8], IA [auth y], IB [auth Y], J [auth 9], JA [auth z], JB [auth Z], K [auth a], KA [auth A], L [auth b], LA [auth B], M [auth c], MA [auth C], N [auth d], NA [auth D], O [auth e], OA [auth E], P [auth f], PA [auth F], Q [auth g], QA [auth G], R [auth h], RA [auth H], S [auth i], SA [auth I], T [auth j], TA [auth J], U [auth k], UA [auth K], V [auth l], VA [auth L], W [auth m], WA [auth M], X [auth n], XA [auth N], Y [auth o], YA [auth O], Z [auth p], ZA [auth P]	619	Homo sapiens	Mutation(s): 0  Gene Names: MX2
UniProt & NIH Common Fund Data Resources
Find proteins for P20592 (Homo sapiens) Explore P20592  Go to UniProtKB:  P20592
PHAROS:  P20592 GTEx:  ENSG00000183486

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 4.60 Å
• Aggregation State: HELICAL ARRAY 
• Reconstruction Method: HELICAL 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	MDFF	3.0
RECONSTRUCTION	RELION	2.0 beta

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2018-02-21 
Deposition Author(s): Perilla, J.R., Alvarez, F.J.D., Zhang, P., Schulten, K.

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Funding Organization	Location	Grant Number
National Institutes of Health	United States	GM082251, GM085043, GM104601, GM067887, AI039394
Medical Research Council (United Kingdom)	United Kingdom	MC_UP_A025_1013
National Science Foundation	United States	OCI 07-25070, ACI-1238993

Revision History  

• Version 1.0: 2018-02-21
  Type: Initial release
  
• Version 1.1: 2018-10-24
  Changes: Data collection, Database references, Other
• Version 1.2: 2019-01-23
  Changes: Data collection, Refinement description
• Version 1.3: 2024-05-15
  Changes: Data collection, Database references, Refinement description