9WM2 | pdb_00009wm2

Crystal structure of Escherichia coli RecG in complex with a partial replication fork and ADPAlF4

• PDB DOI: https://doi.org/10.2210/pdb9WM2/pdb

• Classification: REPLICATION/DNA
• Organism(s): Escherichia coli K-12, chemical production metagenome
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2025-09-02 Released: 2026-09-09 
• Deposition Author(s): Cheng, K.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 
  0.234 (Depositor) 
• R-Value Work: 
  0.224 (Depositor) 
• R-Value Observed: 
  0.225 (Depositor) 

Starting Model: experimental

wwPDB Validation

Currently 9WM2 does not have a validation slider image.

Literature

Structural insights into DNA replication fork reversal by RecG

Cheng, K.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 96.09 kDa 
• Atom Count: 6,617 
• Modeled Residue Count: 750 
• Deposited Residue Count: 755 
• Unique protein chains: 1
• Unique nucleic acid chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ATP-dependent DNA helicase RecG	A	693	Escherichia coli K-12	Mutation(s): 0  Gene Names: recG, radC, spoV, b3652, JW3627 EC: 5.6.2.4
UniProt
Find proteins for P24230 (Escherichia coli (strain K12)) Explore P24230  Go to UniProtKB:  P24230

Entity ID: 2
Molecule	Chains	Length	Organism	Image
DNA (5'-D(*GP*TP*CP*TP*TP*CP*GP*GP*CP*AP*AP*TP*GP*CP*TP*CP*CP*AP*TP*GP*TP*T)-3')	B	22	chemical production metagenome

Entity ID: 3
Molecule	Chains	Length	Organism	Image
DNA (30-MER)	C	30	chemical production metagenome

Entity ID: 4
Molecule	Chains	Length	Organism	Image
DNA (5'-D(*CP*GP*AP*GP*CP*AP*CP*TP*GP*C)-3')	D	10	chemical production metagenome

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ADP( Subject of Investigation/LOI)	E [auth A]	ADENOSINE-5'-DIPHOSPHATE C10 H15 N5 O10 P2 XTWYTFMLZFPYCI-KQYNXXCUSA-N
ALF( Subject of Investigation/LOI)	F [auth A]	TETRAFLUOROALUMINATE ION Al F4 UYOMQIYKOOHAMK-UHFFFAOYSA-J
MG( Subject of Investigation/LOI)	G [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free:  0.234 (Depositor) 
• R-Value Work:  0.224 (Depositor) 
• R-Value Observed: 0.225 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 59.25	α = 90
b = 140.452	β = 90
c = 176.96	γ = 90

Software Package:

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

Structure Validation

Currently 9WM2 does not have a validation slider image.

Entry History 

& Funding Information

Deposition Data

• Released Date: 2026-09-09 
Deposition Author(s): Cheng, K.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	32100017
National Natural Science Foundation of China (NSFC)	China	32270043

Revision History  

• Version 1.0: 2026-09-09
  Type: Initial release