Biological Assembly 1  

 3D View: Structure

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 10.30 kDa 
• Atom Count: 719 
• Modelled Residue Count: 86 
• Deposited Residue Count: 86 
• Unique protein chains: 2

2K7L

NMR structure of a complex formed by the C-terminal domain of human RAP74 and a phosphorylated peptide from the central domain of the FCP1

• DOI: 10.2210/pdb2K7L/pdb
• BMRB: 15919

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


• Deposited: 2008-08-13 Released: 2009-06-02 
• Deposition Author(s): Yang, A., Abbott, K.L., Desjardins, A., Di Lello, P., Omichinski, J.G., Legault, P.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 21 
• Conformers Submitted: 21 
• Selection Criteria: all calculated structures submitted 

Literature

NMR structure of a complex formed by the carboxyl-terminal domain of human RAP74 and a phosphorylated peptide from the central domain of the FCP1 phosphatase

Yang, A., Abbott, K.L., Desjardins, A., Di Lello, P., Omichinski, J.G., Legault, P.

(2009) Biochemistry 48: 1964-1974

• PubMed: 19215094 
• DOI: 10.1021/bi801549m
• Primary Citation of Related Structures:  
  2K7L


• PubMed Abstract: 
  

Recycling of RNA polymerase II (RNAPII) requires dephosphorylation of the C-terminal domain (CTD) of the largest subunit of the polymerase. FCP1 enables the recycling of RNAPII via its CTD-specific phosphatase activity, which is stimulated by the RAP74 subunit of the general transcription factor TFIIF. Both the central (centFCP1) and C-terminal (cterFCP1) domains of FCP1 interact independently and specifically with the C-terminal domain of RAP74 (cterRAP74), suggesting that these interactions mediate the stimulatory effect of TFIIF on the CTD phosphatase activity of FCP1. Phosphorylation of FCP1 by casein kinase 2 on residues in its central (T584) and C-terminal (S942 and S944) domains stimulates its binding to RAP74 and its CTD phosphatase activity. To improve our understanding of the FCP1-RAP74 interactions, we previously determined the NMR structure of a complex formed by human cterRAP74 and cterFCP1. We now present the high-resolution NMR structure and thermodynamic characterization by isothermal titration calorimetry of a complex formed by the same cterRAP74 domain and a phosphorylated peptide from the central domain of human FCP1 (centFCP1-PO(4)). Comparison of the cterFCP1-cterRAP74 and centFCP1-PO(4)-cterRAP74 complexes indicates that centFCP1 and cterFCP1 both utilize hydrophobic and acidic residues to recognize the same groove of RAP74, but there are significant differences in the details of their interactions. These differences point to the adaptability of RAP74 to recognize the two regions of FCP1. Our NMR and thermodynamic studies further elucidate the complex molecular mechanism by which TFIIF and FCP1 cooperate for RNAPII recycling.

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Organizational Affiliation: 

Département de Biochimie, Université de Montréal, Succursale Centre-Ville, QC, Canada.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
centFCP1-T584PO4 peptide	B	19	N/A	Mutation(s): 0
Find proteins for Q9Y5B0 (Homo sapiens) Explore Q9Y5B0  Go to UniProtKB:  Q9Y5B0
NIH Common Fund Data Resources
PHAROS:  Q9Y5B0 GTEx:  ENSG00000060069

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
General transcription factor IIF subunit 1	A	67	Homo sapiens	Mutation(s): 0  Gene Names: GTF2F1, RAP74
Find proteins for P35269 (Homo sapiens) Explore P35269  Go to UniProtKB:  P35269
NIH Common Fund Data Resources
PHAROS:  P35269 GTEx:  ENSG00000125651

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
TPO	B	L-PEPTIDE LINKING	C4 H10 N O6 P		THR

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 21 
• Conformers Submitted: 21 
• Selection Criteria: all calculated structures submitted 
• OLDERADO: 2K7L Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-08-13 
• Released Date: 2009-06-02 
Deposition Author(s): Yang, A., Abbott, K.L., Desjardins, A., Di Lello, P., Omichinski, J.G., Legault, P.

Revision History  

• Version 1.0: 2009-06-02
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2020-02-19
  Changes: Derived calculations, Other