2QA5 Cell Cycle, Structural Protein date Jun 14, 2007
title Crystal Structure Of Sept2 G-Domain
authors M.Sirajuddin, A.Wittinghofer
compound source
Molecule: Septin-2
Chain: A, B
Synonym: Protein Nedd5
Engineered: Yes
Organism_scientific: Homo Sapiens
Organism_common: Human
Organism_taxid: 9606
Strain: Bl21
Gene: Sept2, Diff6, Kiaa0158, Nedd5
Expression_system: Escherichia Coli
Expression_system_taxid: 562
Expression_system_strain: Bl31
Expression_system_vector_type: Plasmid
Expression_system_plasmid: Pgex6p1
symmetry Space Group: C 1 2 1
R_factor 0.280 R_Free 0.314
length a length b length c angle alpha angle beta angle gamma
162.960 53.920 110.270 90.00 128.37 90.00
method X-Ray Diffractionresolution 3.40 Å
ligand GDP, MSE enzyme
A, B

Primary referenceStructural insight into filament formation by mammalian septins., Sirajuddin M, Farkasovsky M, Hauer F, Kuhlmann D, Macara IG, Weyand M, Stark H, Wittinghofer A, Nature. 2007 Jul 18;. PMID:17637674
Data retrieval
  • Asymmetric unit, PDB entry: [header only] [complete with coordinates] (80 Kb) [Save to disk]
  • Biological Unit Coordinates (2qa5.pdb1.gz) 73 Kb
  • LPC: Ligand-Protein Contacts for 2QA5
  • CSU: Contacts of Structural Units for 2QA5
  • Likely Quarternary Molecular Structure file(s) for 2QA5
  • Structure Factors (82 Kb)
  • Retrieve 2QA5 in mmCIF format [Save to disk]
  • SEQRES to COORDINATES correlation for 2QA5 from S2C, [Save to disk]
  • Re-refined 2qa5 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models
  • View 2QA5 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 2QA5
  • 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 2QA5, from MSDmotif at EBI
  • Fold representative 2qa5 from FSSP and Dali (Families of Structurally Similar Proteins)
  • Sequence-derived information
  • View one-letter amino acid or nucleotide sequence for each chain: [2qa5_A] [2qa5_B] [2qa5]
  • SWISS-PROT database: [Q15019]
  • Domain organization of [SEPT2_HUMAN] by SWISSPFAM
  • Other resources with information on 2QA5
  • Community annotation for 2QA5 at PDBWiki (http://pdbwiki.org)
  • MMDB (Entrez's Structure Database)
  • Movements, Movies and Images
  • Images from IMB Jena Image Library of Biological Macromolecules.

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