2RCQ

Crystal structure of human apo Cellular Retinol Binding Protein II (CRBP-II)

• PDB DOI: https://doi.org/10.2210/pdb2RCQ/pdb

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


• Deposited: 2007-09-20 Released: 2007-10-02 
• Deposition Author(s): Monaco, H.L., Capaldi, S., Perduca, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.20 Å
• R-Value Free: 0.217 
• R-Value Work: 0.196 
• R-Value Observed: 0.197 

Starting Model: experimental

Literature

Crystal structure of human cellular retinol-binding protein II to 1.2 A resolution.

Tarter, M., Capaldi, S., Carrizo, M.E., Ambrosi, E., Perduca, M., Monaco, H.L.

(2007) Proteins 70: 1626-1630

• PubMed: 18076076 
• DOI: https://doi.org/10.1002/prot.21848
• Primary Citation of Related Structures:  
  2RCQ, 2RCT

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Organizational Affiliation: 

Department of Science and Technology, Biocrystallography Laboratory, University of Verona, Verona 37134, Italy.

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: 16.84 kDa 
• Atom Count: 1,348 
• Modelled Residue Count: 141 
• Deposited Residue Count: 141 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Retinol-binding protein II, cellular	A	141	Homo sapiens	Mutation(s): 0  Gene Names: RBP2, CRBP2
UniProt & NIH Common Fund Data Resources
Find proteins for P50120 (Homo sapiens) Explore P50120  Go to UniProtKB:  P50120
PHAROS:  P50120 GTEx:  ENSG00000114113

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
TLA	D [auth A]	L(+)-TARTARIC ACID C4 H6 O6 FEWJPZIEWOKRBE-JCYAYHJZSA-N
SO4	B [auth A], C [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.20 Å
• R-Value Free: 0.217 
• R-Value Work: 0.196 
• R-Value Observed: 0.197 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 35.518	α = 90
b = 49.834	β = 90
c = 74.398	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
MAR345dtb	data collection
MOSFLM	data reduction
SCALA	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-10-02 
Deposition Author(s): Monaco, H.L., Capaldi, S., Perduca, M.

Revision History  

• Version 1.0: 2007-10-02
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2016-12-14
  Changes: Structure summary
• Version 1.3: 2023-08-30
  Changes: Data collection, Database references, Derived calculations, Refinement description