9LX2 | pdb_00009lx2

anti-CRISPR-associated protein, Aca11

• PDB DOI: https://doi.org/10.2210/pdb9LX2/pdb

• Classification: DNA BINDING PROTEIN
• Organism(s): Streptococcus sp.
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2025-02-17 Released: 2025-11-12 
• Deposition Author(s): Lee, S.Y., Park, H.H.
• Funding Organization(s): National Research Foundation (NRF, Korea)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.94 Å
• R-Value Free: 
  0.227 (Depositor), 0.226 (DCC) 
• R-Value Work: 
  0.199 (Depositor), 0.199 (DCC) 
• R-Value Observed: 
  0.201 (Depositor) 

Starting Model: in silico

Literature

Structure of Aca11 at 1.94 Angstroms resolution.

Lee, S.Y., Park, H.H.

To be published.

Biological Assembly 1  

Global Symmetry: Dihedral - D2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: light scattering

Macromolecule Content 

• Total Structure Weight: 32.55 kDa 
• Atom Count: 2,196 
• Modeled Residue Count: 264 
• Deposited Residue Count: 284 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
anti-CRISPR-associated protein Aca11	A, B, C, D	71	Streptococcus sp.	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.94 Å
• R-Value Free:  0.227 (Depositor), 0.226 (DCC) 
• R-Value Work:  0.199 (Depositor), 0.199 (DCC) 
• R-Value Observed: 0.201 (Depositor) 

Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 24.06	α = 105.549
b = 52.6	β = 96.9
c = 58.29	γ = 100.556

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XDS	data scaling
PHENIX	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-11-12 
Deposition Author(s): Lee, S.Y., Park, H.H.

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Funding Organization	Location	Grant Number
National Research Foundation (NRF, Korea)	Korea, Republic Of	--

Revision History  

• Version 1.0: 2025-11-12
  Type: Initial release