Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 8.41 kDa 
• Atom Count: 581 
• Modelled Residue Count: 71 
• Deposited Residue Count: 71 
• Unique protein chains: 1

2MML

T47 phosphorylation of the Mengovirus Leader Protein: NMR Studies of the Phosphorylation of the Mengovirus Leader Protein Reveal Stabilization of Intermolecular Domain Interactions

• DOI: 10.2210/pdb2MML/pdb
• BMRB: 19858

• Classification: VIRAL PROTEIN
• Organism(s): Mengo virus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2014-03-15 Released: 2014-10-15 
• Deposition Author(s): Bacot-Davis, V.R., Porter, F.W., Palmenberg, A.C.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Literature

Solution structures of Mengovirus Leader protein, its phosphorylated derivatives, and in complex with nuclear transport regulatory protein, RanGTPase.

Bacot-Davis, V.R., Ciomperlik, J.J., Basta, H.A., Cornilescu, C.C., Palmenberg, A.C.

(2014) Proc Natl Acad Sci U S A 111: 15792-15797

• PubMed: 25331866 
• DOI: 10.1073/pnas.1411098111
• Primary Citation of Related Structures:  
  2MMI, 2MMH, 2MMG, 2MML, 2MMK


• PubMed Abstract: 
  

Cardiovirus Leader (L) proteins induce potent antihost inhibition of active cellular nucleocytoplasmic trafficking by triggering aberrant hyperphosphorylation of nuclear pore proteins (Nup). To achieve this, L binds protein RanGTPase (Ran), a key trafficking regulator, and diverts it into tertiary or quaternary complexes with required kinases. The activity of L is regulated by two phosphorylation events not required for Ran binding. Matched NMR studies on the unphosphorylated, singly, and doubly phosphorylated variants of Mengovirus L (L(M)) show both modifications act together to partially stabilize a short internal α-helix comprising L(M) residues 43-46. This motif implies that ionic and Van der Waals forces contributed by phosphorylation help organize downstream residues 48-67 into a new interface. The full structure of L(M) as bound to Ran (unlabeled) and Ran (216 aa) as bound by L(M) (unlabeled) places L(M) into the BP1 binding site of Ran, wrapped by the conformational flexible COOH tail. The arrangement explains the tight KD for this complex and places the LM zinc finger and phosphorylation interface as surface exposed and available for subsequent reactions. The core structure of Ran, outside the COOH tail, is not altered by L(M) binding and remains accessible for canonical RanGTP partner interactions. Pull-down assays identify at least one putative Ran:L(M) partner as an exportin, Crm1, or CAS. A model of Ran:L(M):Crm1, based on the new structures suggests LM phosphorylation status may mediate Ran's selection of exportin(s) and cargo(s), perverting these native trafficking elements into the lethal antihost Nup phosphorylation pathways.

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Organizational Affiliation: 

Institute for Molecular Virology and Department of Biochemistry, University of Wisconsin-Madison, Madison, WI 53706 [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Leader protein	A	71	Mengo virus	Mutation(s): 0  EC: 3.6.4.13 (UniProt), 3.4.22.28 (UniProt), 2.7.7.48 (UniProt)
Find proteins for P12296 (Mengo encephalomyocarditis virus) Explore P12296  Go to UniProtKB:  P12296

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	A	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
TPO	A	L-PEPTIDE LINKING	C4 H10 N O6 P		THR

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2MML Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2014-03-15 
• Released Date: 2014-10-15 
Deposition Author(s): Bacot-Davis, V.R., Porter, F.W., Palmenberg, A.C.

Revision History  

• Version 1.0: 2014-10-15
  Type: Initial release
  
• Version 1.1: 2014-11-05
  Changes: Database references
• Version 1.2: 2014-11-19
  Changes: Database references