Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Biological Assembly Evidence: isothermal titration calorimetry

Macromolecule Content

• Total Structure Weight: 42.70 kDa 
• Atom Count: 2810 
• Modelled Residue Count: 341 
• Deposited Residue Count: 378 
• Unique protein chains: 2

6B3X

Crystal structure of CstF-50 in complex with CstF-77

• PDB DOI: 10.2210/pdb6B3X/pdb

• Classification: GENE REGULATION
• Organism(s): Homo sapiens
• Expression System: unidentified baculovirus
• Mutation(s): No 


• Deposited: 2017-09-25 Released: 2017-11-29 
• Deposition Author(s): Yang, W., Hsu, P., Yang, F., Song, J.E., Varani, G.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.262 
• R-Value Work: 0.214 
• R-Value Observed: 0.217 

Literature

Reconstitution of the CstF complex unveils a regulatory role for CstF-50 in recognition of 3'-end processing signals.

Yang, W., Hsu, P.L., Yang, F., Song, J.E., Varani, G.

(2018) Nucleic Acids Res 46: 493-503

• PubMed: 29186539 
• DOI: 10.1093/nar/gkx1177
• Primary Citation of Related Structures:  
  6B3X


• PubMed Abstract: 
  

Cleavage stimulation factor (CstF) is a highly conserved protein complex composed of three subunits that recognizes G/U-rich sequences downstream of the polyadenylation signal of eukaryotic mRNAs. While CstF has been identified over 25 years ago, the architecture and contribution of each subunit to RNA recognition have not been fully understood. In this study, we provide a structural basis for the recruitment of CstF-50 to CstF via interaction with CstF-77 and establish that the hexameric assembly of CstF creates a high affinity platform to target various G/U-rich sequences. We further demonstrate that CstF-77 boosts the affinity of the CstF-64 RRM to the RNA targets and CstF-50 fine tunes the ability of the complex to recognize G/U sequences of certain lengths and content.

---

Organizational Affiliation: 

Department of Chemistry, University of Washington, Seattle, WA 98195-1700, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cleavage stimulation factor subunit 1	A	358	Homo sapiens	Mutation(s): 0  Gene Names: CSTF1
UniProt & NIH Common Fund Data Resources
Find proteins for Q05048 (Homo sapiens) Explore Q05048  Go to UniProtKB:  Q05048
PHAROS:  Q05048 GTEx:  ENSG00000101138

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Cleavage stimulation factor subunit 3	B	20	Homo sapiens	Mutation(s): 0  Gene Names: CSTF3
UniProt & NIH Common Fund Data Resources
Find proteins for Q12996 (Homo sapiens) Explore Q12996  Go to UniProtKB:  Q12996
PHAROS:  Q12996 GTEx:  ENSG00000176102

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.262 
• R-Value Work: 0.214 
• R-Value Observed: 0.217 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 43.863	α = 90
b = 74.491	β = 90
c = 95.105	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
MR-Rosetta	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2017-09-25 
• Released Date: 2017-11-29 
Deposition Author(s): Yang, W., Hsu, P., Yang, F., Song, J.E., Varani, G.

---

Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM064440

Revision History  

• Version 1.0: 2017-11-29
  Type: Initial release
  
• Version 1.1: 2017-12-06
  Changes: Author supporting evidence
• Version 1.2: 2017-12-13
  Changes: Database references
• Version 1.3: 2018-02-07
  Changes: Database references
• Version 1.4: 2020-01-01
  Changes: Author supporting evidence