1QKL | pdb_00001qkl

hRPABC14.4, essential subunit of human RNA polymerases I, II and III

• PDB DOI: https://doi.org/10.2210/pdb1QKL/pdb

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


• Deposited: 1999-07-26 Released: 1999-11-07 
• Deposition Author(s): Del Rio-Portilla, F., Gaskell, A.G., Gilbert, D., Ladias, J.A.A., Wagner, G.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 75 
• Conformers Submitted: 22 
• Selection Criteria: LEAST RESTRAINT VIOLATIONS 

Literature

Solution Structure of the Hrpabc14.4 Subunit of Human RNA Polymerases

Del Rio-Portilla, F., Gaskell, A.G., Gilbert, D., Ladias, J.A.A., Wagner, G.

(1999) Nat Struct Biol 6: 1039

• PubMed: 10542096 
• DOI: https://doi.org/10.1038/14923
• Primary Citation Related Structures: 
  1QKL


• PubMed Abstract: 
  

  The protein hRPABC14.4 is an essential subunit of human RNA polymerases I, II, and III and is required for the transcription of all human nuclear genes. The structure of hRPABC14.4 was determined by nuclear magnetic resonance spectroscopy. The protein fold comprises a highly conserved central domain forming two antiparallel alpha-helices flanked by the less conserved N- and C-terminal regions forming a five-stranded beta-sandwich. Amino acids from the two helices participate in the generation of a hydrophobic surface area which is conserved in all eukaryotic and archaeal homologous subunits, and likely constitutes a critical macromolecular interaction interface. The hRPABC14.4 structure accounts for mutagenesis results in Saccharomyces cerevisiae and provides a structural working model for elucidating the role of this subunit in the molecular architecture and function of the human nuclear RNA polymerases.

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Organizational Affiliation: 
• Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts 02115, USA.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 14.49 kDa 
• Atom Count: 1,013 
• Modeled Residue Count: 127 
• Deposited Residue Count: 127 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
DNA-DIRECTED RNA POLYMERASE II 14.4 KD POLYPEPTIDE	A	127	Homo sapiens	Mutation(s): 0  EC: 2.7.7.6
UniProt & NIH Common Fund Data Resources
Find proteins for P61218 (Homo sapiens) Explore P61218  Go to UniProtKB:  P61218
PHAROS:  P61218 GTEx:  ENSG00000100142

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 75 
• Conformers Submitted: 22 
• Selection Criteria: LEAST RESTRAINT VIOLATIONS 

Structure Validation

Entry History 

Deposition Data

• Released Date: 1999-11-07 
Deposition Author(s): Del Rio-Portilla, F., Gaskell, A.G., Gilbert, D., Ladias, J.A.A., Wagner, G.

Revision History  

• Version 1.0: 1999-11-07
  Type: Initial release
  
• Version 1.1: 2017-04-19
  Changes: Atomic model, Other
• Version 1.2: 2024-05-15
  Changes: Data collection, Database references, Other