9UKG | pdb_00009ukg

CryoEM structure of Brucella melitensis CobS-CobT complex with AMPPNP (conformation 5)

PDB DOI: https://doi.org/10.2210/pdb9UKG/pdb
EM Map EMD-64238: EMDB EMDataResource

Classification: LIGASE
Organism(s): Brucella melitensis
Expression System: Escherichia coli
Mutation(s): No

Deposited: 2025-04-17 Released: 2026-07-29
Deposition Author(s): Zhou, Y.L., Chen, X., Liu, L.
Funding Organization(s): National Natural Science Foundation of China (NSFC)

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 3.54 Å
Aggregation State: FILAMENT
Reconstruction Method: SINGLE PARTICLE

wwPDB Validation 3D Report Full Report

Validation slider image for 9UKG

This is version 1.0 of the entry. See complete history.

Literature

Assembly of the ATP-driven cobalt chelatase

Zhou, Y.L., Yuan, H., Wu, Y.C., Wang, J., Chen, H., Yao, L., Wang, M., Wang, X., Wang, J., He, C., Chen, X., Liu, L.

(2026) bioRxiv

DOI: https://doi.org/10.64898/2026.07.21.739949

Macromolecule Content

Total Structure Weight: 292.4 kDa
Atom Count: 16,921
Modeled Residue Count: 2,125
Deposited Residue Count: 2,605
Unique protein chains: 2

Macromolecules

Find similar proteins by:

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cobaltochelatase subunit CobS	A, B, C, D, E A, B, C, D, E, F	328	Brucella melitensis	Mutation(s): 0 Gene Names: BI318_03735 EC: 6.6.1.2
UniProt
Find proteins for A0AB36PZV1 (Brucella melitensis) Explore A0AB36PZV1 Go to UniProtKB: A0AB36PZV1
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	A0AB36PZV1
Sequence Annotations Expand
Reference Sequence

Find similar proteins by:

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Cobaltochelatase subunit CobT	G	637	Brucella melitensis	Mutation(s): 0 Gene Names: BI318_03740 EC: 6.6.1.2
UniProt
Find proteins for A0AB36PXH5 (Brucella melitensis) Explore A0AB36PXH5 Go to UniProtKB: A0AB36PXH5
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	A0AB36PXH5
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
ANP (Subject of Investigation/LOI) Query on ANP Download:Ideal Coordinates CCD File SDF format, chain H [auth E] SDF format, chain J [auth F] MOL2 format, chain H [auth E] MOL2 format, chain J [auth F] mmCIF format, chain H [auth E] mmCIF format, chain J [auth F]	H [auth E], J [auth F]	PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER C₁₀ H₁₇ N₆ O₁₂ P₃ PVKSNHVPLWYQGJ-KQYNXXCUSA-N		Interactions Focus chain H [auth E] Focus chain J [auth F] Interactions & Density Focus chain H [auth E] Focus chain J [auth F]
MG (Subject of Investigation/LOI) Query on MG Download:Ideal Coordinates CCD File SDF format, chain I [auth E] SDF format, chain K [auth F] MOL2 format, chain I [auth E] MOL2 format, chain K [auth F] mmCIF format, chain I [auth E] mmCIF format, chain K [auth F]	I [auth E], K [auth F]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N		Interactions Focus chain I [auth E] Focus chain K [auth F] Interactions & Density Focus chain I [auth E] Focus chain K [auth F]

Experimental Data & Validation

Experimental Data

Method: ELECTRON MICROSCOPY
Resolution: 3.54 Å
Aggregation State: FILAMENT
Reconstruction Method: SINGLE PARTICLE

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.20.1_4487

Structure Validation

View Full Validation Report

View more in-depth experimental data

Entry History

& Funding Information

Deposition Data

Released Date: 2026-07-29

Deposition Author(s):

Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	32471323
National Natural Science Foundation of China (NSFC)	China	32371270

Revision History (Full details and data files)

Version 1.0: 2026-07-29
Type: Initial release

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.