1KQ2	Translation Rna	date	Jan 03, 2002
title	Crystal Structure Of An Hfq-Rna Complex
authors	M.A.Schumacher, R.F.Pearson, T.Moller, P.Valentin-Hansen, R.G.Br
compound		source
Molecule: 5'-R(Apupupupupupg)-3' Chain: R Engineered: Yes		Synthetic: Yes
Molecule: Host Factor For Q Beta Chain: A, B, H, I, K, M Synonym: Hfq Engineered: Yes		Organism_scientific: Staphylococcus Aureus Organism_taxid: 1280 Expression_system: Escherichia Coli Expression_system_taxid: 562 Expression_system_vector_type: Plasmid Expression_system_plasmid: Ptyb11
symmetry	Space Group: C 2 2 21	R_factor 0.204 R_Free 0.266
crystal cell	length a length b length c angle alpha angle beta angle gamma 80.870 115.600 101.840 90.00 90.00 90.00
method	X-Ray Diffraction	resolution	2.71 Å
related structures	by homologous chain: 1KQ1
Gene Ontology	Chain Function Process Component H, A, M, K, I, B
Primary reference	Structures of the pleiotropic translational regulator Hfq and an Hfq-RNA complex: a bacterial Sm-like protein., Schumacher MA, Pearson RF, Moller T, Valentin-Hansen P, Brennan RG, EMBO J 2002 Jul 1;21(13):3546-56. PMID:12093755

Data retrieval

Asymmetric unit, PDB entry: [header only] [complete with coordinates] (67 Kb) [Save to disk] Biological Unit Coordinates (1kq2.pdb1.gz) 63 Kb CSU: Contacts of Structural Units for 1KQ2 Likely Quarternary Molecular Structure file(s) for 1KQ2 Structure Factors (154 Kb) Retrieve 1KQ2 in mmCIF format [Save to disk] SEQRES to COORDINATES correlation for 1KQ2 from S2C, [Save to disk] Re-refined 1kq2 structure from PDB_REDO, a databank with updated and optimised macromolecular X-ray diffraction structure models

View 1KQ2 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 1KQ2

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 3D motif for 1KQ2, from MSDmotif at EBI Structure summary from SCOR (Structural Classification of RNA) Classification of representative domains in scop (Structural Classification of Proteins)     - Domain d1kq2a_, region A [Jmol] [rasmolscript] [script source]     - Domain d1kq2b_, region B [Jmol] [rasmolscript] [script source]     - Domain d1kq2h_, region H [Jmol] [rasmolscript] [script source]     - Domain d1kq2i_, region I [Jmol] [rasmolscript] [script source]     - Domain d1kq2k_, region K [Jmol] [rasmolscript] [script source]     - Domain d1kq2m_, region M [Jmol] [rasmolscript] [script source] 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: [1kq2_I] [1kq2_R] [1kq2_A] [1kq2_B] [1kq2] [1kq2_M] [1kq2_H] [1kq2_K] SWISS-PROT database: [Q99UG9] Domain organization of [Q99UG9_STAAM] by SWISSPFAM

Other resources with information on 1KQ2

Community annotation for 1KQ2 at PDBWiki (http://pdbwiki.org) MMDB (Entrez's Structure Database)

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