8H7Q | pdb_00008h7q

Cryo-EM structure of Synechocystis sp. PCC6714 Cascade at 3.8 angstrom resolution

• PDB DOI: https://doi.org/10.2210/pdb8H7Q/pdb
• EM Map EMD-34524: EMDB EMDataResource
• NAKB: 8H7Q

• Classification: RNA BINDING PROTEIN
• Organism(s): Synechocystis sp. PCC 6714, synthetic construct
• Expression System: Escherichia coli 'BL21-Gold(DE3)pLysS AG
• Mutation(s): No 


• Deposited: 2022-10-20 Released: 2023-10-25 
• Deposition Author(s): Xiao, Y., Lu, M., Yu, C., Zhang, Y.
• Funding Organization(s): National Natural Science Foundation of China (NSFC), Ministry of Science and Technology (MoST, China)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.80 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Cryo-EM structure of Synechocystis sp. PCC6714 Cascade at 3.8 angstrom resolution

Xiao, Y., Lu, M., Yu, C., Zhang, Y.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 12-mer - A7B4C1 

Local Symmetry: Helical - H  (Explore in 3D)
Local Stoichiometry: Homo 7-mer - A7 Local Symmetry: Helical - H  (Explore in 3D)
Local Stoichiometry: Homo 4-mer - B4 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 346.92 kDa 
• Atom Count: 22,884 
• Modeled Residue Count: 2,734 
• Deposited Residue Count: 2,922 
• Unique protein chains: 3
• Unique nucleic acid chains: 3

Macromolecules

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
CRISPR associated protein Cas8	D [auth B], E [auth C], F [auth E], G [auth F], H [auth G], I [auth H], J [auth I]	301	Synechocystis sp. PCC 6714	Mutation(s): 0  Gene Names: D082_50510
UniProt
Find proteins for A0ACD6B8S1 (Synechocystis sp. (strain PCC 6714)) Explore A0ACD6B8S1  Go to UniProtKB:  A0ACD6B8S1

Entity ID: 5
Molecule	Chains	Sequence Length	Organism	Details	Image
CRISPR associated protein Cas11b	K [auth J], L [auth K], M [auth N], N [auth O]	124	Synechocystis sp. PCC 6714	Mutation(s): 0  Gene Names: D082_50500
UniProt
Find proteins for A0ACD6B8S0 (Synechocystis sp. (strain PCC 6714)) Explore A0ACD6B8S0  Go to UniProtKB:  A0ACD6B8S0

Entity ID: 6
Molecule	Chains	Sequence Length	Organism	Details	Image
CRISPR associated protein Cas5	O [auth A]	237	Synechocystis sp. PCC 6714	Mutation(s): 0  Gene Names: D082_50520
UniProt
Find proteins for A0ACD6B8S2 (Synechocystis sp. (strain PCC 6714)) Explore A0ACD6B8S2  Go to UniProtKB:  A0ACD6B8S2

Entity ID: 1
Molecule	Chains	Length	Organism	Image
CRISPR RNA	A [auth D]	36	Synechocystis sp. PCC 6714

Entity ID: 2
Molecule	Chains	Length	Organism	Image
Target DNA	B [auth L]	35	synthetic construct

Entity ID: 3
Molecule	Chains	Length	Organism	Image
Non target DNA	C [auth M]	11	synthetic construct

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.80 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2023-10-25 
Deposition Author(s): Xiao, Y., Lu, M., Yu, C., Zhang, Y.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	31970547
Ministry of Science and Technology (MoST, China)	China	2018YFA0902000

Revision History  

• Version 1.0: 2023-10-25
  Type: Initial release
  
• Version 1.1: 2025-05-14
  Changes: Data collection, Structure summary