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Crystal structure of the T. thermophilus RNA polymerase holoenzyme

Analyse Crystal structure of the T. thermophilus RNA polymerase holoenzyme in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
2A6E
Type
protein
Length
6,818 residues
Chains
12
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
DNA-directed RNA polymerase alpha chain; DNA-directed RNA polymerase beta chain…
EC
2.7.7.6
UniProt
Q5SHR6, Q8RQE9, Q8RQE8, Q8RQE7, Q5SKW1
Ligands
ZN, MG
Pockets
20 · best druggability 0.86

Structure

x-ray diffraction · 5 distinct chains · 36% helix, 16% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
A, B, K, LDNA-directed RNA polymerase alpha chain (EC 2.7.7.6)protein22921% helix, 40% strandQ5SHR6
C, MDNA-directed RNA polymerase beta chain (EC 2.7.7.6)protein111926% helix, 21% strandQ8RQE9
D, NDNA-directed RNA polymerase beta' chain (EC 2.7.7.6)protein139239% helix, 13% strandQ8RQE8
E, ORNA polymerase omega chainprotein9549% helix, 4% strandQ8RQE7
F, PRNA polymerase sigma factor rpodprotein34567% helix, 1% strandQ5SKW1

Ligands and binding sites

  • ZN · Zinc ion · metal · 4 copies · chains D, N
  • MG · Magnesium ion · metal · 2 copies · chains D, N

Binding sites are the residues within 4.5 Å of a ligand's heavy atoms.

Pockets

20 pockets found on a 1 Å grid, 20 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
110990.860.86108empty
28100.840.8781empty
35230.840.9065empty
44560.840.9165empty
58030.840.8790empty

Interfaces

19 interfaces between chains.

  • C–D · 9276 Ų buried · 125 hydrogen bonds · protein-protein
  • M–N · 9044 Ų buried · 118 hydrogen bonds · protein-protein
  • N–P · 4128 Ų buried · 53 hydrogen bonds · protein-protein
  • D–F · 3953 Ų buried · 65 hydrogen bonds · protein-protein
  • N–O · 2458 Ų buried · 30 hydrogen bonds · protein-protein

Compared structures

  • 2A6E · Crystal structure of the T. Thermophilus RNA polymerase holoenzyme · the same entry in another collection · chain P against P, TM-score 1.00

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