1QLN Nucleotidyltransferase date Sep 01, 1999
title Structure Of A Transcribing T7 Rna Polymerase Initiation Complex
authors G.M.T.Cheetham, T.A.Steitz
compound source
Molecule: Bacteriophage T7 Rna Polymerase
Chain: A
Engineered: Yes
Organism_scientific: Bacteriophage T7
Organism_taxid: 10760
Expression_system: Escherichia Coli
Expression_system_taxid: 511693
Expression_system_strain: Bl21
Expression_system_plasmid: Par1219

Molecule: Dna (5- D (Pcptpcpcpcptpaptpapgptpgpapgptpcpgptp Aptptpa)-3);
Chain: T
Fragment: Promoter
Synonym: Template Strand

Synthetic: Yes
Organism_scientific: Bacteriophage T7
Organism_taxid: 10760

Molecule: Dna (5- D(Ptpapaptpapcpgpapcptpcpapcptpa)-3);
Chain: N
Fragment: Promoter
Synonym: Non-Template Strand

Synthetic: Yes
Organism_scientific: Bacteriophage T7
Organism_taxid: 10760

Molecule: Rna (5- R(Pppgpgpg)-3)
Chain: R
Fragment: Transcript

Synthetic: Yes
symmetry Space Group: P 21 21 2
R_factor 0.223 R_Free 0.267
length a length b length c angle alpha angle beta angle gamma
221.200 73.600 80.900 90.00 90.00 90.00
method X-Ray Diffractionresolution 2.4 Å
ligand GTP enzyme Transferase E.C. BRENDA
related structures by homologous chain: 1CEZ, 1MSW

Primary referenceStructure of a transcribing T7 RNA polymerase initiation complex., Cheetham GM, Steitz TA, Science 1999 Dec 17;286(5448):2305-9. PMID:10600732
Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (164 Kb) [Save to disk]
  • Biological Unit Coordinates (1qln.pdb1.gz) 162 Kb
  • LPC: Ligand-Protein Contacts for 1QLN
  • CSU: Contacts of Structural Units for 1QLN
  • Likely Quarternary Molecular Structure file(s) for 1QLN
  • Structure Factors (380 Kb)
  • Retrieve 1QLN in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 1QLN from S2C, [Save to disk]
  • Re-refined 1qln structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 1QLN in 3D
  • Proteopedia, because life has more than 2D.
  • On Jmol, a nice Rasmol like molecule viewer. This is good for easiest viewing of basic structure.
  • On FirstGlance, an excellent tool for a guided tour on the structure components, by E. Martz.
  • Visual 3D analysis of 1QLN
  • Cartoon representation from PDB Cartoon
  • Ramachandran plot from PDBSum
  • Structure-derived information
  • Electron Density related parameters from EDS Electron Density Server, at Upsala
  • Dipole moment, from Dipole Server at Weizmann Institute
  • Crystal Contacts, from CryCo at Weizmann Institute
  • 3D motif for 1QLN, from MSDmotif at EBI
  • Classification of representative domains in scop (Structural Classification of Proteins)
        - Domain d1qlna_, region A [Jmol] [rasmolscript] [script source]
  • Fold representative 1qln from FSSP and Dali (Families of Structurally Similar Proteins)
  • Class (fold), Architecture (subfold), Topology, Homologous superfamily from CATH
  • Summaries and structural analyses of PDB data files from PDBSum
  • Identification of Protein Pockets & Cavities at CASTp
  • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [1qln_T] [1qln] [1qln_R] [1qln_A] [1qln_N]
  • SWISS-PROT database: [P00573]
  • Domain organization of [RPOL_BPT7] by SWISSPFAM
  • Domain found in 1QLN: [RPOL_N ] by SMART
  • Other resources with information on 1QLN
  • Community annotation for 1QLN at PDBWiki (http://pdbwiki.org)
  • MMDB (Entrez's Structure Database)
  • Movements, Movies and Images
  • Domain movements in 1QLN from the Database of Macromolecular Movements.
  • Images from IMB Jena Image Library of Biological Macromolecules.

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