Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 294.82 kDa 
• Atom Count: 19,274 
• Modelled Residue Count: 2,425 
• Deposited Residue Count: 2,674 
• Unique protein chains: 2

 3VE1

The 2.9 angstrom crystal structure of Transferrin binding protein B (TbpB) from serogroup B M982 Neisseria meningitidis in complex with human transferrin

• PDB DOI: 10.2210/pdb3VE1/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Neisseria meningitidis serogroup B, Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2012-01-06 Released: 2012-02-22 
• Deposition Author(s): Calmettes, C., Moraes, T.F.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.96 Å
• R-Value Free: 0.249 
• R-Value Work: 0.207 
• R-Value Observed: 0.209 

Literature

The structural basis of transferrin sequestration by transferrin-binding protein B.

Calmettes, C., Alcantara, J., Yu, R.H., Schryvers, A.B., Moraes, T.F.

(2012) Nat Struct Mol Biol 19: 358-360

• PubMed: 22343719 
• DOI: 10.1038/nsmb.2251
• Primary Citation of Related Structures:  
  3VE1, 3VE2


• PubMed Abstract: 
  

Neisseria meningitidis, the causative agent of bacterial meningitis, acquires the essential element iron from the host glycoprotein transferrin during infection through a surface transferrin receptor system composed of proteins TbpA and TbpB. Here we present the crystal structures of TbpB from N. meningitidis in its apo form and in complex with human transferrin. The structure reveals how TbpB sequesters and initiates iron release from human transferrin.

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Organizational Affiliation: 

Department of Biochemistry, University of Toronto, Toronto, Ontario, Canada.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Transferrin-binding protein 2	A, C	658	Neisseria meningitidis serogroup B	Mutation(s): 0  Gene Names: tbpB, tbp2
UniProt
Find proteins for Q09057 (Neisseria meningitidis serogroup B) Explore Q09057  Go to UniProtKB:  Q09057

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Serotransferrin	B, D	679	Homo sapiens	Mutation(s): 0  Gene Names: TF, PRO1400
UniProt & NIH Common Fund Data Resources
Find proteins for P02787 (Homo sapiens) Explore P02787  Go to UniProtKB:  P02787
PHAROS:  P02787

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GOL	E [auth A], F [auth A], I [auth B], J [auth B], K [auth B], L [auth B], M [auth B], N [auth B], O [auth C], R [auth D], S [auth D], T [auth D], U [auth D]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
CO3	G [auth B], P [auth D]	CARBONATE ION C O3 BVKZGUZCCUSVTD-UHFFFAOYSA-L
FE	H [auth B], Q [auth D]	FE (III) ION Fe VTLYFUHAOXGGBS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.96 Å
• R-Value Free: 0.249 
• R-Value Work: 0.207 
• R-Value Observed: 0.209 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 128.023	α = 90
b = 153.509	β = 90
c = 169.511	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
PHASER	phasing
PHENIX	refinement
PDB_EXTRACT	data extraction

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-02-22 
Deposition Author(s): Calmettes, C., Moraes, T.F.

Revision History  

• Version 1.0: 2012-02-22
  Type: Initial release
  
• Version 1.1: 2012-09-05
  Changes: Database references
• Version 1.2: 2013-09-18
  Changes: Derived calculations