4j5y

Crystal structure of Hfq from Pseudomonas aeruginosa in complex with ATP

spinqualitylabelsall models 4j5y, resolution 2.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4j5y is a 6 chain structure with sequence from Pseudomonas aeruginosa pao1. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ATP, NA, PEG Related: 1u1s, 1u1t, 3qui, 3gib, 3rer, 3qo3, 4j6w, 4j6x, 4j6y Gene: hfq, PA4944 (Pseudomonas aeruginosa PAO1) Resources: FirstGlance, OCA, RCSB, PDBsum Function [HFQ_PSEAE] RNA chaperone that binds small regulatory RNA (sRNAs) and mRNAs to facilitate mRNA translational regulation in response to envelope stress, environmental stress and changes in metabolite concentrations. Also binds with high specificity to tRNAs (By similarity). Publication Abstract from PubMed The Hfq protein forms a doughnut-shaped homohexamer that possesses RNA-binding activity. There are two distinct RNA-binding surfaces located on the proximal and the distal sides of the hexamer. The proximal side is involved in the binding of mRNA and small noncoding RNAs (sRNAs), while the distal side has an affinity for A-rich RNA sequences. In this work, the ability of various ribonucleotides to form complexes with Hfq from Pseudomonas aeruginosa has been tested using X-ray crystallography. ATP and ADPNP have been located in the distal R-site, which is a site for poly(A) RNA binding. UTP has been found in the so-called lateral RNA-binding site at the proximal surface. CTP has been found in both the distal R-site and the proximal U-binding site. GTP did not form a complex with Hfq under the conditions tested. The results have demonstrated the power of the crystallographic method for locating ribonucleotides and predicting single-stranded RNA-binding sites on the protein surface. Hfq binds ribonucleotides in three different RNA-binding sites.,Murina V, Lekontseva N, Nikulin A Acta Crystallogr D Biol Crystallogr. 2013 Aug;69(Pt 8):1504-13. doi:, 10.1107/S090744491301010X. Epub 2013 Jul 18. PMID:23897473 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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