1HQM image
Deposition Date 2000-12-18
Release Date 2001-02-07
Last Version Date 2024-02-07
Entry Detail
PDB ID:
1HQM
Keywords:
TRANSFERASE
Title:
CRYSTAL STRUCTURE OF THERMUS AQUATICUS CORE RNA POLYMERASE-INCLUDES COMPLETE STRUCTURE WITH SIDE-CHAINS (EXCEPT FOR DISORDERED REGIONS)-FURTHER REFINED FROM ORIGINAL DEPOSITION-CONTAINS ADDITIONAL SEQUENCE INFORMATION
Biological Source:
Source Organism:
Thermus aquaticus (Taxon ID: 271)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
3.30 Å
R-Value Free:
0.36
R-Value Work:
0.30
R-Value Observed:
0.30
Space Group:
P 41 21 2
1HQM validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase subunit alpha
Gene (Uniprot):rpoA
Chain IDs:A, B
Chain Length:313
Number of Molecules:2
Biological Source:Thermus aquaticus
UniProt ID:Q9KWU8 Pfam ID:PF01000, PF03118, PF01193
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase subunit beta
Gene (Uniprot):rpoB
Chain IDs:C
Chain Length:1119
Number of Molecules:1
Biological Source:Thermus aquaticus
UniProt ID:Q9KWU7 Pfam ID:PF04565, PF04563, PF00562, PF10385, PF04561, PF04560
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase subunit beta'
Gene (Uniprot):rpoC
Chain IDs:D
Chain Length:1265
Number of Molecules:1
Biological Source:Thermus aquaticus
UniProt ID:Q9KWU6 Pfam ID:PF04997, PF00623, PF05000, PF04998, PF04983
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-directed RNA polymerase subunit omega
Gene (Uniprot):rpoZ
Chain IDs:E
Chain Length:99
Number of Molecules:1
Biological Source:Thermus aquaticus
UniProt ID:Q9EVV4 Pfam ID:PF01192
Ligand Molecules
MG
ZN
Primary Citation
Bacterial RNA polymerase subunit omega and eukaryotic RNA polymerase subunit RPB6 are sequence, structural, and functional homologs and promote RNA polymerase assembly.
Proc.Natl.Acad.Sci.USA 98 892 897 (2001)
PMID: 11158566 DOI: 10.1073/pnas.98.3.892

Abstact

Bacterial DNA-dependent RNA polymerase (RNAP) has subunit composition beta'betaalpha(I)alpha(II)omega. The role of omega has been unclear. We show that omega is homologous in sequence and structure to RPB6, an essential subunit shared in eukaryotic RNAP I, II, and III. In Escherichia coli, overproduction of omega suppresses the assembly defect caused by substitution of residue 1362 of the largest subunit of RNAP, beta'. In yeast, overproduction of RPB6 suppresses the assembly defect caused by the equivalent substitution in the largest subunit of RNAP II, RPB1. High-resolution structural analysis of the omega-beta' interface in bacterial RNAP, and comparison with the RPB6-RPB1 interface in yeast RNAP II, confirms the structural relationship and suggests a "latching" mechanism for the role of omega and RPB6 in promoting RNAP assembly.

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Primary Citation of related structures
1HQM