The bacterial periplasmic histidine-binding protein. structure/function analysis of the ligand-binding site and comparison with related proteins

Cited 88 time in webofscience Cited 0 time in scopus
  • Hit : 238
  • Download : 0
Bacterial periplasmic binding proteins are initial receptors in the process of active transport across cell membranes and/or chemotaxis. Among them, the histidine-binding protein (HisJ) has been extensively studied from the biochemical, physiological, and genetic points of view. The three dimensional crystal structure of the histidine binding protein complexed with histidine has been determined at 2.5-Angstrom resolution by the molecular replacement method using as a probe structure the previously solved lysine liganded structure of the lysine-, arginine-, ornithine binding protein (LAG), which shares 70% sequence identity with HisJ. The structure is bi-lobate; the two lobes, one bigger than the other, are connected by two short strands and are in contact with each other (closed) enclosing the histidine. Charged, polar, and non-polar side chains, as well as the peptide backbone, are involved in tight binding of the histidine. The bound histidine is involved in eight direct hydrogen bonds, six with the bigger lobe and two with the smaller lobe, in one potential water-mediated hydrogen bond with the bigger lobe, as well as in ionic interactions. The HisJ residues surrounding the ligand are the same as the LAO residues interacting with lysine, except for residue 52 which is leucine in HisJ and phenylalanine in LAG. The Leu-52 in HisJ makes a hydrophobic interaction with the imidazole ring of histidine. Of seven mutations affecting the ligand-binding site, five are located in the ligand-binding site, one in a con strand, and one at the domains interface. Based on comparisons among related binding proteins, the specific interactions between the ligands and the respective binding protein residues are predicted for the glutamine-binding protein and the opines-binding protein
Publisher
AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
Issue Date
1994-02
Language
English
Article Type
Article
Keywords

ESCHERICHIA-COLI; SALMONELLA-TYPHIMURIUM; TRANSPORT-SYSTEMS; ACTIVE-TRANSPORT; RESOLUTION STRUCTURE; AGROBACTERIUM-TUMEFACIENS; MALTOSE TRANSPORT; ARGININE-BINDING; LYSINE-BINDING; X-RAY

Citation

JOURNAL OF BIOLOGICAL CHEMISTRY, v.269, no.6, pp.4135 - 4143

ISSN
0021-9258
URI
http://hdl.handle.net/10203/65683
Appears in Collection
BS-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 88 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0