1JKW | pdb_00001jkw

STRUCTURE OF CYCLIN MCS2

• PDB DOI: https://doi.org/10.2210/pdb1JKW/pdb

• Classification: CELL DIVISION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1996-10-11 Released: 1997-01-11 
• Deposition Author(s): Andersen, G., Poterszman, A., Moras, D., Thierry, J.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 
  0.272 (Depositor) 
• R-Value Work: 
  0.222 (Depositor) 
• R-Value Observed: 
  0.222 (Depositor) 

Literature

The crystal structure of human cyclin H.

Andersen, G., Poterszman, A., Egly, J.M., Moras, D., Thierry, J.C.

(1996) FEBS Lett 397: 65-69

• PubMed: 8941715 
• DOI: https://doi.org/10.1016/s0014-5793(96)01143-x
• Primary Citation Related Structures: 
  1JKW


• PubMed Abstract: 
  

  The crystal structure of human cyclin H has been solved at 2.6 A resolution by the MIR method and refined to an R-factor of 23.1%. The core of the molecule consists of two helical repeats adopting the canonical cyclin fold already observed in the structures of cyclin A [Brown et al. (1995) Structure 3, 1235-1247; Jeffrey et al. (1995) Nature 376, 313-320; Russo et al. (1996) Nature 382, 325-331] and TFIIB [Nikoilov et al. (1995) Nature 377, 119-128]. The N-terminal and C-terminal residues form a new domain built on two long helices interacting essentially with the first repeat of the molecule.

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Organizational Affiliation: 
• Institut de Génétique et Biologie Moléculaire et Cellulaire, CNRS/INSERM/ULP, Illkirch, France.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 37.68 kDa 
• Atom Count: 2,299 
• Modeled Residue Count: 277 
• Deposited Residue Count: 323 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CYCLIN H	A	323	Homo sapiens	Mutation(s): 0  Gene Names: HUMAN CYCLIN H
UniProt & NIH Common Fund Data Resources
Find proteins for P51946 (Homo sapiens) Explore P51946  Go to UniProtKB:  P51946
PHAROS:  P51946 GTEx:  ENSG00000134480

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free:  0.272 (Depositor) 
• R-Value Work:  0.222 (Depositor) 
• R-Value Observed: 0.222 (Depositor) 

Space Group: I 4₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 84.06	α = 90
b = 84.06	β = 90
c = 373.3	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
XDS	data reduction
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-01-11 
Deposition Author(s): Andersen, G., Poterszman, A., Moras, D., Thierry, J.C.

Revision History  

• Version 1.0: 1997-01-11
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-07
  Changes: Data collection, Database references, Other
• Version 1.4: 2026-01-28
  Changes: Database references, Structure summary