Biological Assembly 1  

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 93873.84 
• Atom Count: 6467 
• Residue Count: 802 
• Unique protein chains: 2

3KAS

Machupo virus GP1 bound to human transferrin receptor 1

• DOI: 10.2210/pdb3KAS/pdb

• Classification: VIRAL PROTEIN/ENDOCYTOSIS
• Organism(s): Homo sapiens, Machupo virus
• Expression System: Cricetulus griseus, Spodoptera frugiperda


• Deposited: 2009-10-19 Released: 2010-03-09 
• Deposition Author(s): Abraham, J., Corbett, K.D., Harrison, S.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.4 Å
• R-Value Free: 0.238 
• R-Value Work: 0.189 

Literature

Structural basis for receptor recognition by New World hemorrhagic fever arenaviruses.

Abraham, J., Corbett, K.D., Farzan, M., Choe, H., Harrison, S.C.

(2010) Nat.Struct.Mol.Biol. 17: 438-444

• PubMed: 20208545 
• DOI: 10.1038/nsmb.1772


• PubMed Abstract: 
  

New World hemorrhagic fever arenaviruses are rodent-borne agents that cause severe human disease. The GP1 subunit of the surface glycoprotein mediates cell attachment through transferrin receptor 1 (TfR1). We report the structure of Machupo virus (MACV) GP1 bound with human TfR1. Atomic details of the GP1-TfR1 interface clarify the importance of TfR1 residues implicated in New World arenavirus host specificity. Analysis of sequence variation among New World arenavirus GP1s and their host-species receptors, in light of the molecular structure, indicates determinants of viral zoonotic transmission. Infectivities of pseudoviruses in cells expressing mutated TfR1 confirm that contacts at the tip of the TfR1 apical domain determine the capacity of human TfR1 to mediate infection by particular New World arenaviruses. We propose that New World arenaviruses that are pathogenic to humans fortuitously acquired affinity for human TfR1 during adaptation to TfR1 of their natural hosts.

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Organizational Affiliation: 

Laboratory of Molecular Medicine, Harvard Medical School, Boston, Massachusetts, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Transferrin receptor protein 1	A	640	Homo sapiens	Mutation(s): 0  Gene Names: TFRC
Find proteins for P02786 (Homo sapiens) Go to Gene View: TFRC Go to UniProtKB:  P02786

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Glycoprotein	B	162	Machupo virus	Mutation(s): 0  Gene Names: GPC
Find proteins for Q8AZ57 (Machupo virus) Go to UniProtKB:  Q8AZ57

Small Molecules

Ligands 6 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
K	A	POTASSIUM ION K NPYPAHLBTDXSSS-UHFFFAOYSA-N
PO4	A, B	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K
MAN	B	ALPHA-D-MANNOSE C6 H12 O6 WQZGKKKJIJFFOK-PQMKYFCFSA-N
FUC	B	ALPHA-L-FUCOSE C6 H12 O5 SHZGCJCMOBCMKK-SXUWKVJYSA-N
BMA	B	BETA-D-MANNOSE C6 H12 O6 WQZGKKKJIJFFOK-RWOPYEJCSA-N
NAG	A, B	N-ACETYL-D-GLUCOSAMINE C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.4 Å
• R-Value Free: 0.238 
• R-Value Work: 0.189 
• Space Group: C 2 2 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 143.951	α = 90.00
b = 170.228	β = 90.00
c = 98.471	γ = 90.00

Software Package:

Software Name	Purpose
PHASER	phasing
PHENIX	refinement
ADSC	data collection
HKL-2000	data scaling
HKL-2000	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-10-19 
• Released Date: 2010-03-09 
• Deposition Author(s): Abraham, J., Corbett, K.D., Harrison, S.C.

Revision History 

• Version 1.0: 2010-03-09
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Version format compliance