8BB0 | pdb_00008bb0

The surface-exposed lipo-protein of BtuG2 in complex with hydroxycobalamin.

• PDB DOI: https://doi.org/10.2210/pdb8BB0/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Bacteroides thetaiotaomicron
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2022-10-12 Released: 2023-10-25 
• Deposition Author(s): Whittaker, J., Felices Martinez, J.M., Guskov, A., Slotboom, D.J.
• Funding Organization(s): Not funded

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free: 
  0.174 (Depositor), 0.177 (DCC) 
• R-Value Work: 
  0.143 (Depositor), 0.146 (DCC) 
• R-Value Observed: 
  0.145 (Depositor) 

Starting Model: experimental

Literature

The surface-exposed lipo-protein of BtuG2 in complex with hydroxycobinamide.

Whittaker, J., Guskov, A.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: isothermal titration calorimetry

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 81.42 kDa 
• Atom Count: 6,137 
• Modeled Residue Count: 641 
• Deposited Residue Count: 654 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Surface layer protein	A, B	327	Bacteroides thetaiotaomicron	Mutation(s): 0  Gene Names: BT_1954
UniProt
Find proteins for Q8A6D0 (Bacteroides thetaiotaomicron (strain ATCC 29148 / DSM 2079 / JCM 5827 / CCUG 10774 / NCTC 10582 / VPI-5482 / E50)) Explore Q8A6D0  Go to UniProtKB:  Q8A6D0

Small Molecules

Ligands 8 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
B12	BA [auth A], UA [auth B]	COBALAMIN C62 H89 Co N13 O14 P LKVIQTCSMMVGFU-DWSMJLPVSA-N
PGE	DA [auth B]	TRIETHYLENE GLYCOL C6 H14 O4 ZIBGPFATKBEMQZ-UHFFFAOYSA-N
PEG	GA [auth B], HA [auth B]	DI(HYDROXYETHYL)ETHER C4 H10 O3 MTHSVFCYNBDYFN-UHFFFAOYSA-N
GOL	IA [auth B], JA [auth B], KA [auth B], LA [auth B], MA [auth B], NA [auth B], OA [auth B], PA [auth B], QA [auth B], RA [auth B], S [auth A], T [auth A], U [auth A], V [auth A], W [auth A], X [auth A], Y [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
ACT	AA [auth A], SA [auth B], TA [auth B], Z [auth A]	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M
SCN	FA [auth B], L [auth A], M [auth A], N [auth A], O [auth A], P [auth A], Q [auth A], R [auth A]	THIOCYANATE ION C N S ZMZDMBWJUHKJPS-UHFFFAOYSA-M
NA	C [auth A], D [auth A], E [auth A], EA [auth B], F [auth A], G [auth A], H [auth A], I [auth A], J [auth A], K [auth A]	SODIUM ION Na FKNQFGJONOIPTF-UHFFFAOYSA-N
OH	CA [auth A], VA [auth B]	HYDROXIDE ION H O XLYOFNOQVPJJNP-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.50 Å
• R-Value Free:  0.174 (Depositor), 0.177 (DCC) 
• R-Value Work:  0.143 (Depositor), 0.146 (DCC) 
• R-Value Observed: 0.145 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 49.11	α = 90
b = 101.099	β = 97.81
c = 79.893	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
Aimless	data scaling
PDB_EXTRACT	data extraction
XDS	data reduction
PHASER	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2023-10-25 
Deposition Author(s): Whittaker, J., Felices Martinez, J.M., Guskov, A., Slotboom, D.J.

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Funding Organization	Location	Grant Number
Not funded	Netherlands	--

Revision History  

• Version 1.0: 2023-10-25
  Type: Initial release
  
• Version 1.1: 2026-03-04
  Changes: Refinement description, Structure summary
• Version 2.0: 2026-09-02
  Type: Remediation
  Reason: Metalloprotein remediation
  Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary