4N4X | pdb_00004n4x

Crystal Structure of the MBP fused human SPLUNC1 (native form)

• PDB DOI: https://doi.org/10.2210/pdb4N4X/pdb

• Classification: LIPID BINDING PROTEIN
• Organism(s): Escherichia coli, Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2013-10-08 Released: 2014-09-17 
• Deposition Author(s): Ning, F., Wang, C., Niu, L., Chu, H.W., Zhang, G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 
  0.268 (Depositor), 0.259 (DCC) 
• R-Value Work: 
  0.215 (Depositor), 0.207 (DCC) 
• R-Value Observed: 
  0.216 (Depositor) 

Literature

Lipid ligands of human SPLUNC1

Ning, F., Wang, C., Niu, L., Chu, H.W., Zhang, G.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 62.88 kDa 
• Atom Count: 4,140 
• Modeled Residue Count: 535 
• Deposited Residue Count: 584 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Maltose-binding periplasmic/Palate lung and nasal epithelium clone fusion protein	A	584	Escherichia coli, Homo sapiens This entity is chimeric	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P0AEX9 (Escherichia coli (strain K12)) Explore P0AEX9  Go to UniProtKB:  P0AEX9
Find proteins for Q9NP55 (Homo sapiens) Explore Q9NP55  Go to UniProtKB:  Q9NP55
PHAROS:  Q9NP55 GTEx:  ENSG00000198183
UniProt Groups	Q9NP55P0AEX9

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PEG	B [auth A]	DI(HYDROXYETHYL)ETHER C4 H10 O3 MTHSVFCYNBDYFN-UHFFFAOYSA-N
MG	C [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free:  0.268 (Depositor), 0.259 (DCC) 
• R-Value Work:  0.215 (Depositor), 0.207 (DCC) 
• R-Value Observed: 0.216 (Depositor) 

Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 119.087	α = 90
b = 119.087	β = 90
c = 98.541	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
CNS	refinement
HKL-2000	data collection
HKL-2000	data reduction
HKL-2000	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-09-17 
Deposition Author(s): Ning, F., Wang, C., Niu, L., Chu, H.W., Zhang, G.

Revision History  

• Version 1.0: 2014-09-17
  Type: Initial release
  
• Version 1.1: 2015-11-11
  Changes: Source and taxonomy
• Version 1.2: 2017-08-02
  Changes: Advisory, Refinement description, Source and taxonomy
• Version 1.3: 2019-07-17
  Changes: Data collection, Refinement description
• Version 1.4: 2024-11-06
  Changes: Advisory, Data collection, Database references, Derived calculations, Structure summary