Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 97.03 kDa 
• Atom Count: 4863 
• Modelled Residue Count: 595 
• Deposited Residue Count: 872 
• Unique protein chains: 2

3Q2S

Crystal Structure of CFIm68 RRM/CFIm25 complex

• DOI: 10.2210/pdb3Q2S/pdb

• Classification: NUCLEAR PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2010-12-20 Released: 2011-02-16 
• Deposition Author(s): Yang, Q., Coseno, M., Gilmartin, G.M., Doublie, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.90 Å
• R-Value Free: 0.278 
• R-Value Work: 0.213 
• R-Value Observed: 0.215 

Literature

Crystal Structure of a Human Cleavage Factor CFI(m)25/CFI(m)68/RNA Complex Provides an Insight into Poly(A) Site Recognition and RNA Looping.

Yang, Q., Coseno, M., Gilmartin, G.M., Doublie, S.

(2011) Structure 19: 368-377

• PubMed: 21295486 
• DOI: 10.1016/j.str.2010.12.021
• Primary Citation of Related Structures:  
  3Q2S, 3Q2T


• PubMed Abstract: 
  

Cleavage factor I(m) (CFI(m)) is a highly conserved component of the eukaryotic mRNA 3' processing machinery that functions in sequence-specific poly(A) site recognition through the collaboration of a 25 kDa subunit containing a Nudix domain and a larger subunit of 59, 68, or 72 kDa containing an RNA recognition motif (RRM). Our previous work demonstrated that CFI(m)25 is both necessary and sufficient for sequence-specific binding of the poly(A) site upstream element UGUA. Here, we report the crystal structure of CFI(m)25 complexed with the RRM domain of CFI(m)68 and RNA. The CFI(m)25 dimer is clasped on opposite sides by two CFI(m)68 RRM domains. Each CFI(m)25 subunit binds one UGUA element specifically. Biochemical analysis indicates that the CFI(m)68 RRMs serve to enhance RNA binding and facilitate RNA looping. The intrinsic ability of CFI(m) to direct RNA looping may provide a mechanism for its function in the regulation of alternative poly(A) site selection.

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Organizational Affiliation: 

Department of Microbiology and Molecular Genetics, University of Vermont, Stafford Hall, Burlington, VT 05405, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cleavage and polyadenylation specificity factor subunit 5	A, B	207	Homo sapiens	Mutation(s): 0  Gene Names: CFIM25, CPSF25, CPSF5, NUDT21, or CPSF5
UniProt & NIH Common Fund Data Resources
Find proteins for O43809 (Homo sapiens) Explore O43809  Go to UniProtKB:  O43809
PHAROS:  O43809 GTEx:  ENSG00000167005

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Cleavage and polyadenylation specificity factor subunit 6	C, D	229	Homo sapiens	Mutation(s): 1  Gene Names: CFIM68, CPSF6
UniProt & NIH Common Fund Data Resources
Find proteins for Q16630 (Homo sapiens) Explore Q16630  Go to UniProtKB:  Q16630
PHAROS:  Q16630 GTEx:  ENSG00000111605

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.90 Å
• R-Value Free: 0.278 
• R-Value Work: 0.213 
• R-Value Observed: 0.215 
• Space Group: P 2₁ 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 139.323	α = 90
b = 139.323	β = 90
c = 139.323	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
MOLREP	phasing
PHENIX	refinement
PDB_EXTRACT	data extraction
MAR345	data collection
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2010-12-20 
• Released Date: 2011-02-16 
Deposition Author(s): Yang, Q., Coseno, M., Gilmartin, G.M., Doublie, S.

Revision History  

• Version 1.0: 2011-02-16
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2017-11-08
  Changes: Advisory, Refinement description