8ZSG | pdb_00008zsg

CryoEM Helical Structure of resting KomBC complex

• PDB DOI: https://doi.org/10.2210/pdb8ZSG/pdb
• EM Map EMD-60414: EMDB EMDataResource

• Classification: IMMUNE SYSTEM
• Organism(s): Escherichia coli
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2024-06-05 Released: 2025-12-10 
• Deposition Author(s): Hao, F., Kai, S., Eddie, T., Bin, W., Min, L.
• Funding Organization(s): Ministry of Education (MoE, Singapore)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.66 Å
• Aggregation State: HELICAL ARRAY 
• Reconstruction Method: HELICAL 

Literature

CryoEM Helical Structure of apo HAM-SIR2

Hao, F., Eddie, T., Bin, W., Min, L.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 24-mer - A12B12 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 619.02 kDa 
• Atom Count: 43,668 
• Modeled Residue Count: 5,376 
• Deposited Residue Count: 5,376 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
KomC, SIR2 domain protein, NADase	A [auth R], B [auth T], G [auth b], H [auth f], I [auth A], J [auth C], O [auth K], P [auth O], Q [auth B], R [auth D], W [auth L], X [auth P]	264	Escherichia coli	Mutation(s): 0  Gene Names: GRW56_02060, GRW57_01895
UniProt
Find proteins for K8WJ15 (Providencia sneebia DSM 19967) Explore K8WJ15  Go to UniProtKB:  K8WJ15

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
KomB, HAM-like protein, non-canonical purine NTP pyrophosphatase	C [auth V], D [auth X], E [auth Z], F [auth d], K [auth E], L [auth G], M [auth I], N [auth M], S [auth F], T [auth H], U [auth J], V [auth N]	184	Escherichia coli	Mutation(s): 0  Gene Names: GRW56_02065, GRW57_01900
UniProt
Find proteins for K8WC63 (Providencia sneebia DSM 19967) Explore K8WC63  Go to UniProtKB:  K8WC63

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.66 Å
• Aggregation State: HELICAL ARRAY 
• Reconstruction Method: HELICAL 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-12-10 
Deposition Author(s): Hao, F., Kai, S., Eddie, T., Bin, W., Min, L.

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Funding Organization	Location	Grant Number
Ministry of Education (MoE, Singapore)	Singapore	--

Revision History  

• Version 1.0: 2025-12-10
  Type: Initial release