4MO1 | pdb_00004mo1

Crystal structure of antitermination protein Q from bacteriophage lambda. Northeast Structural Genomics Consortium target OR18A.

• PDB DOI: https://doi.org/10.2210/pdb4MO1/pdb

• Classification: Transcription regulator
• Organism(s): Lambdavirus lambda
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2013-09-11 Released: 2013-09-25 
• Deposition Author(s): Vorobiev, S., Su, M., Nickels, B., Seetharaman, J., Sahdev, S., Xiao, R., Kogan, S., Maglaqui, M., Wang, D., Everett, J.K., Acton, T.B., Ebright, R.H., Montelione, G.T., Hunt, J., Tong, L., Northeast Structural Genomics Consortium (NESG)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 
  0.249 (Depositor), 0.239 (DCC) 
• R-Value Work: 
  0.214 (Depositor), 0.201 (DCC) 
• R-Value Observed: 
  0.216 (Depositor) 

Literature

Crystal structure of antitermination protein Q from bacteriophage lambda.

Vorobiev, S., Su, M., Nickels, B., Seetharaman, J., Sahdev, S., Xiao, R., Kogan, S., Maglaqui, M., Wang, D., Everett, J.K., Acton, T.B., Ebright, R.H., Montelione, G.T., Hunt, J., Tong, L.

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

Biological Assembly 2  

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

Biological assembly 2 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 40.43 kDa 
• Atom Count: 2,372 
• Modeled Residue Count: 288 
• Deposited Residue Count: 356 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Antitermination protein Q	A, B	178	Lambdavirus lambda	Mutation(s): 0  Gene Names: Q
UniProt
Find proteins for P03047 (Escherichia phage lambda) Explore P03047  Go to UniProtKB:  P03047

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
BR	D [auth A], G [auth B], H [auth B]	BROMIDE ION Br CPELXLSAUQHCOX-UHFFFAOYSA-M
ZN	C [auth A], F [auth B]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
CL	E [auth A], I [auth B], J [auth B]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A, B	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free:  0.249 (Depositor), 0.239 (DCC) 
• R-Value Work:  0.214 (Depositor), 0.201 (DCC) 
• R-Value Observed: 0.216 (Depositor) 

Space Group: P 3₂

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 54.474	α = 90
b = 54.474	β = 90
c = 109.852	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
PDB_EXTRACT	data extraction
ADSC	data collection
HKL-2000	data reduction
HKL-2000	data scaling
SHELXS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-09-25 
Deposition Author(s): Vorobiev, S., Su, M., Nickels, B., Seetharaman, J., Sahdev, S., Xiao, R., Kogan, S., Maglaqui, M., Wang, D., Everett, J.K., Acton, T.B., Ebright, R.H., Montelione, G.T., Hunt, J., Tong, L., Northeast Structural Genomics Consortium (NESG)

Revision History  

• Version 1.0: 2013-09-25
  Type: Initial release
  
• Version 1.1: 2017-10-25
  Changes: Author supporting evidence
• Version 1.2: 2024-10-09
  Changes: Data collection, Database references, Derived calculations, Structure summary