1AD6

DOMAIN A OF HUMAN RETINOBLASTOMA TUMOR SUPPRESSOR

• PDB DOI:  https://doi.org/10.2210/pdb1AD6/pdb

• Classification: TRANSCRIPTION REGULATION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 1997-02-21 Released: 1998-08-26 
• Deposition Author(s): Kim, H.Y., Cho, Y.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.240 
• R-Value Work: 0.201 

Literature

Structural similarity between the pocket region of retinoblastoma tumour suppressor and the cyclin-box.

Kim, H.Y., Cho, Y.

(1997) Nat Struct Biol 4: 390-395

• PubMed: 9145110 
• DOI: https://doi.org/10.1038/nsb0597-390
• Primary Citation of Related Structures:  
  1AD6


• PubMed Abstract: 
  

  The pocket region of retinoblastoma tumour suppressor (Rb) is essential for tumour suppressing activity. The Rb pocket is primarily composed of two domains, A and B. We have determined the X-ray crystal structure of domain A (residues 378-562) at 2.3 A resolution. Domain A consists of nine alpha-helices. The overall arrangement of helices in domain A is remarkably similar to the cyclin-box folds found in the crystal structures of cyclin A and TFIIB. This structure, along with domain B which is predicted to be homologous to the cyclin-box, suggests that the Rb pocket is composed of two cyclin-box fold domains. We present the structural/functional features of the Rb pocket, and the potential binding region for cellular or viral proteins within domain A.

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Organizational Affiliation: 

Structural Biology Center, Korea Institute of Science and Technology, Cheongryang, Seoul, South Korea.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 21.34 kDa 
• Atom Count: 1,567 
• Modelled Residue Count: 185 
• Deposited Residue Count: 185 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
RETINOBLASTOMA TUMOR SUPPRESSOR	A	185	Homo sapiens	Mutation(s): 0  Gene Names: RB1
UniProt & NIH Common Fund Data Resources
Find proteins for P06400 (Homo sapiens) Explore P06400  Go to UniProtKB:  P06400
PHAROS:  P06400

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.240 
• R-Value Work: 0.201 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 38.6	α = 90
b = 68.04	β = 90
c = 80.83	γ = 90

Software Package:

Software Name	Purpose
MLPHARE	phasing
TNT	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 1998-08-26 
Deposition Author(s): Kim, H.Y., Cho, Y.

Revision History  

• Version 1.0: 1998-08-26
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance