3NO2 | pdb_00003no2

Crystal structure of a protein of unknown function (BACCAC_01654) from Bacteroides caccae at 1.35 A resolution

• PDB DOI: https://doi.org/10.2210/pdb3NO2/pdb

• Classification: UNKNOWN FUNCTION
• Organism(s): Bacteroides caccae ATCC 43185
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2010-06-24 Released: 2010-07-28 
• Deposition Author(s): Joint Center for Structural Genomics (JCSG)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.35 Å
• R-Value Free: 
  0.160 (Depositor), 0.166 (DCC) 
• R-Value Work: 
  0.147 (Depositor), 0.154 (DCC) 
• R-Value Observed: 
  0.147 (Depositor) 

Literature

Crystal structure of a protein of unknown function (BACCAC_01654) from Bacteroides caccae at 1.35 A resolution

Joint Center for Structural Genomics (JCSG)

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)

Macromolecule Content 

• Total Structure Weight: 31.12 kDa 
• Atom Count: 2,765 
• Modeled Residue Count: 274 
• Deposited Residue Count: 276 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
uncharacterized protein	A	276	Bacteroides caccae ATCC 43185	Mutation(s): 0  Gene Names: BACCAC_01654, ZP_01960044.1

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CIT	C [auth A]	CITRIC ACID C6 H8 O7 KRKNYBCHXYNGOX-UHFFFAOYSA-N
PEG	D [auth A], E [auth A]	DI(HYDROXYETHYL)ETHER C4 H10 O3 MTHSVFCYNBDYFN-UHFFFAOYSA-N
CL	B [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.35 Å
• R-Value Free:  0.160 (Depositor), 0.166 (DCC) 
• R-Value Work:  0.147 (Depositor), 0.154 (DCC) 
• R-Value Observed: 0.147 (Depositor) 

Diffraction Data: https://doi.org/10.18430/M33NO2

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 46.173	α = 90
b = 63.798	β = 90
c = 105.6	γ = 90

Software Package:

Software Name	Purpose
SHELX	phasing
REFMAC	refinement
XSCALE	data scaling
PDB_EXTRACT	data extraction
XDS	data reduction
SHELXD	phasing
autoSHARP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2010-07-28 
Deposition Author(s): Joint Center for Structural Genomics (JCSG)

Revision History  

• Version 1.0: 2010-07-28
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2023-02-01
  Changes: Database references, Derived calculations
• Version 1.3: 2024-11-20
  Changes: Data collection, Structure summary
• Version 1.4: 2025-10-22
  Changes: Structure summary