8CB2

A complex of cagX and cagY components of Helicobacter pylori type IV secretion system

• PDB DOI: https://doi.org/10.2210/pdb8CB2/pdb

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


• Deposited: 2023-01-25 Released: 2024-02-07 
• Deposition Author(s): Isupov, M.N., Jiang, M., Zhang, H., Wu, Y.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.298 
• R-Value Work: 0.252 

Literature

A complex of cagX and cagY components of Helicobacter pylori type IV secretion system

Isupov, M.N., Jiang, M.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 95.39 kDa 
• Atom Count: 6,032 
• Modelled Residue Count: 773 
• Deposited Residue Count: 856 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cag pathogenicity island protein	A [auth AAA], C [auth CCC]	164	Helicobacter pylori	Mutation(s): 0  Gene Names: HP0528
UniProt
Find proteins for Q75X32 (Helicobacter pylori) Explore Q75X32  Go to UniProtKB:  Q75X32

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Type IV secretion system apparatus protein CagY (Fragment)	B [auth BBB], D [auth DDD]	264	Helicobacter pylori	Mutation(s): 0  Gene Names: cagY

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CA (Subject of Investigation/LOI)	E [auth CCC]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.298 
• R-Value Work: 0.252 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 55.059	α = 90
b = 196.123	β = 90
c = 200.128	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XSCALE	data scaling
CRANK2	phasing
MOLREP	phasing
DM	phasing
Coot	model building
BUSTER	refinement
ISOLDE	refinement

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-02-07 
Deposition Author(s): Isupov, M.N., Jiang, M., Zhang, H., Wu, Y.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	--

Revision History  

• Version 1.0: 2024-02-07
  Type: Initial release