Abstract:
:Imidazolonepropionase (HutI) (imidazolone-5-propanote hydrolase, EC 3.5.2.7) is a member of the amidohydrolase superfamily and catalyzes the conversion of imidazolone-5-propanoate to N-formimino-L-glutamate in the histidine degradation pathway. We have determined the three-dimensional crystal structures of HutI from Agrobacterium tumefaciens (At-HutI) and an environmental sample from the Sargasso Sea Ocean Going Survey (Es-HutI) bound to the product [ N-formimino-L-glutamate (NIG)] and an inhibitor [3-(2,5-dioxoimidazolidin-4-yl)propionic acid (DIP)], respectively. In both structures, the active site is contained within each monomer, and its organization displays the landmark feature of the amidohydrolase superfamily, showing a metal ligand (iron), four histidines, and one aspartic acid. A catalytic mechanism involving His265 is proposed on the basis of the inhibitor-bound structure. This mechanism is applicable to all HutI forms.
journal_name
Biochemistryjournal_title
Biochemistryauthors
Tyagi R,Eswaramoorthy S,Burley SK,Raushel FM,Swaminathan Sdoi
10.1021/bi800180gsubject
Has Abstractpub_date
2008-05-20 00:00:00pages
5608-15issue
20eissn
0006-2960issn
1520-4995journal_volume
47pub_type
杂志文章相关文献
BIOCHEMISTRY文献大全abstract::Holliday junctions are central intermediates in the process of genetic recombination. These DNA molecules contain four double helices that flank a central branch point, so that each of the four strands that constitute the junction is associated with two different helices. Previously, we have shown that such branched j...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00003a026
更新日期:1995-01-24 00:00:00
abstract::Regulation of adenylate cyclase by alpha 2 adrenergic receptors requires the inhibitory guanine nucleotide binding protein Ni. A role for this protein has also been suggested in the high-affinity binding of agonists to the alpha 2 receptor. We recently reported that alkaline treatment can selectively inactivate alpha ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00386a061
更新日期:1987-06-16 00:00:00
abstract::G-Rich DNA and RNA have a higher propensity to form G-quadruplex structures, but the presence of G-runs alone is not sufficient to prove that such sequences can form stable G-quadruplexes. While G-rich sequences are essential for G-quadruplex formation, not all G-rich sequences have the propensity to form G-quadruplex...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi500773c
更新日期:2014-11-18 00:00:00
abstract::A series of peptide fragments of sperm whale myoglobin, corresponding to segments of the region between the G- and H-helices of the protein, have been synthesized and their conformational preferences investigated using circular dichroism and nuclear magnetic resonance spectroscopy in aqueous solution and in solvent mi...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00076a007
更新日期:1993-06-29 00:00:00
abstract::The sigmoidal dependence of activity on substrate concentration exhibited by the regulatory enzyme aspartate transcarbamoylase (ATCase) of Escherichia coli is generally attributed to a ligand-promoted change in the quaternary structure of the enzyme. Although a global conformational change in ATCase upon the binding o...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00467a019
更新日期:1990-04-17 00:00:00
abstract::The photobleaching pathway of a short-wavelength cone opsin purified in delipidated form (lambda(max) = 425 nm) is reported. The batho intermediate of the violet cone opsin generated at 45 K has an absorption maximum at 450 nm. The batho intermediate thermally decays to the lumi intermediate (lambda(max) = 435 nm) at ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi010387y
更新日期:2001-07-03 00:00:00
abstract::Substitution of Co(II) for the catalytic site Zn(II) of horse liver alcohol dehydrogenase (LADH) yields an active enzyme derivative, CoIIE, with characteristic Co(II) charge-transfer and d-d electronic transitions that are sensitive to the events which take place during catalysis [Koerber, S. C., MacGibbon, A. K. H., ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00377a031
更新日期:1987-02-10 00:00:00
abstract::Protein L is a multidomain protein expressed at the surface of some strains of the anaerobic bacterial species Peptostreptococcus magnus. It has affinity for immunoglobulin (Ig) through interaction with framework structures in the variable Ig light chain domain. The Ig-binding activity is located to five homologous re...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00251a008
更新日期:1994-11-29 00:00:00
abstract::The reaction of ferric cytochrome c peroxidase (CcP) from Saccharomyces cerevisiae with peroxide produces compound I, characterized by both an oxyferryl iron center and a protein-based free radical. The electron paramagnetic resonance (EPR) signal of the CcP compound I radical can be resolved into a broad majority com...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00221a036
更新日期:1991-02-19 00:00:00
abstract::Surface plasmon resonance (SPR) detection technology was employed to investigate the kinetic mechanism of deoxyadenosine kinase from Mycoplasma mycoides ssp. mycoides SC. In our experimental approach, the enzyme was attached to the sensor surface, the reactants were injected in the mobile phase, and the product-enzyme...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi0515523
更新日期:2006-01-17 00:00:00
abstract::Membrane-bound phosphodiesterase 6 (PDE6) plays an important role in visual signal transduction by regulating cGMP levels in rod photoreceptor cells. Our understanding of PDE6 catalysis and structure suffers from inadequate characterization of the α and β subunit catalytic core, interactions of the core with two intri...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi2014695
更新日期:2011-11-08 00:00:00
abstract::The mitochondrial folate transporter (MFT) was previously identified in human and hamster cells. Sequence homology of this protein with the inner mitochondrial membrane transporters suggested a domain structure in which the N- and C-termini of the protein are located on the mitochondrial intermembrane-facing surface, ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi062191+
更新日期:2007-02-13 00:00:00
abstract::It now appears that photosynthetic prokaryotes and lower eukaryotes possess higher plant phytochrome-like proteins. In this work, a second phytochrome-like gene was isolated, in addition to the recently identified Cph1 phytochrome, from the Synechocystis sp. PCC 6803, and its gene product was characterized photochemic...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi992831r
更新日期:2000-09-05 00:00:00
abstract::While calcium binding to troponin C (TnC) triggers the contraction of both skeletal and cardiac muscle, there is clear evidence that different mechanisms may be involved. For example, activation of heart myofilaments occurs with binding to a single regulatory site on TnC, whereas activation of fast skeletal myofilamen...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi971223d
更新日期:1997-10-07 00:00:00
abstract::Aminoacylation of a transfer RNA (tRNA) by its cognate aminoacyl-tRNA synthetase relies upon the recognition of specific nucleotides as well as conformational features within the tRNA by the synthetase. In Escherichia coli, the aminoacylation of tRNA(His) by histidyl-tRNA synthetase (HisRS) is highly dependent upon th...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi035708f
更新日期:2004-02-03 00:00:00
abstract::The plasma membrane of the cell is a complex, tightly regulated, heterogeneous environment shaped by proteins, lipids, and small molecules. Ca2+ ions are important cellular messengers, spatially separated from anionic lipids. After cell injury, disease, or apoptotic events, anionic lipids are externalized to the outer...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.8b01069
更新日期:2018-12-18 00:00:00
abstract::PDZ domains are modular protein-protein interaction domains that bind to specific C-terminal sequences of membrane proteins and/or to other PDZ domains. Certain PDZ domains in PSD-95 and syntrophins interact with C-terminal peptide ligands and heterodimerize with the extended nNOS PDZ domain. The capacity to interact ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi001633t
更新日期:2000-11-28 00:00:00
abstract::The sequential solid-phase synthesis of a peptide analogue of bovine brain calmodulin calcium binding site III covering residues 81-113 of the natural sequence is described. Methionine-109 is replaced by a leucine residue to avoid complications in the synthesis and purification. In an attempt to relate the structure o...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00393a019
更新日期:1987-09-22 00:00:00
abstract::Fourier transform infrared (FTIR) spectroscopy was applied to the blue-light photoreceptor photoactive yellow protein (PYP) to investigate water structural changes possibly involved in the photocycle of PYP. Photointermediates were stabilized at low temperature, and difference IR spectra were obtained between intermed...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi000357f
更新日期:2000-07-11 00:00:00
abstract::Purine nucleoside phosphorylase (PNP) catalyzes the reversible phosphorolysis of purine ribonucleosides and 2'-deoxyribonucleosides, yielding the purine base and (2'-deoxy)ribose 1-phosphate as products. While this enzyme has been extensively studied, several questions with respect to the catalytic mechanism have rema...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.5b01347
更新日期:2016-04-12 00:00:00
abstract::A conformational transition is described for the polypeptide, gramicidin A, in which a dimer that forms a left-handed intertwined antiparallel helix is converted to a single-stranded amino terminus to amino terminus right-handed helix. The starting structure is determined here by solution NMR methods while reference i...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00152a019
更新日期:1992-09-22 00:00:00
abstract::The distance between the calcium site (site I) and the zinc site (site II) in alpha-lactalbumin was estimated from Forster energy-transfer measurements between donor Eu(III) [or Tb(III)] at site I and acceptor Co(II) at site II to be 11.5 +/- 1.5 A. Intersite distances were also measured between the bis-ANS [4,4'-bis[...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00365a024
更新日期:1986-08-26 00:00:00
abstract::Receptor tyrosine kinase (RTK) activation is associated with modulation of heptahelical receptor-stimulated adenylyl cyclase responses. The mechanisms underlying the RTK-mediated enhancement of adenylyl cyclase function remain unclear. In the present studies, we show that the tyrosine kinase-dependent enhancement of a...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi0015818
更新日期:2001-02-13 00:00:00
abstract::In many crustaceans, changing concentrations of several low molecular weight compounds modulates hemocyanin oxygen binding, resulting in lower or higher oxygen affinities of the pigment. The nonphysiological effector caffeine and the physiological modulator urate, the latter accumulating in the hemolymph of the lobste...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi050507s
更新日期:2005-08-02 00:00:00
abstract::The use of derivatives of alpha-thrombin obtained by limited proteolysis, that have only a single peptide bond cleaved, allowed the unequivocal correlation between the change in covalent structure and alteration of the enzymatic properties. beta T-Thrombin contains a single cleavage in the surface loop corresponding t...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00406a049
更新日期:1988-03-22 00:00:00
abstract::The epidermal growth factor receptor (EGFR) is a transmembrane protein involved in cell signaling processes, and dysregulation of its activity often drives tumor growth. EGFR is a clinically validated tumor marker and target for antibodies and tyrosine kinase inhibitors. We demonstrate that a fusion protein of the nat...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/acs.biochem.9b00021
更新日期:2019-02-26 00:00:00
abstract::Cations often deform the structure of regulatory proteins to affect a functional response, but for other protein functions a more passive effect is desired. For instance, it is shown here that in the conductance of Na+ by the gramicidin channel there appears to be no significant structural deformation of either the si...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi961170k
更新日期:1996-09-17 00:00:00
abstract::Murine epidermal growth factor (EGF), a 53 amino acid protein, has been modified by enzymic digestion, site-specific chemical reactions, and recombinant DNA technology. After trypsin digestion the EGF derivatives EGF1-48 (called EGF-T) and EGF1-45 (called EGF-T2) were separated from the residual EGF and the C-terminal...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00414a005
更新日期:1988-07-12 00:00:00
abstract::alpha 1-Adrenergic receptor probes, which can be radioiodinated to yield high specific activity radioligands, have been synthesized and characterized. 2-[4-(4-Amino-benzoyl)piperazin-1-yl]-4-amino-6,7-dimethoxyquin azoline (CP63,155), an arylamine analogue of the selective alpha 1-adrenergic antagonist prazosin, and i...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00311a031
更新日期:1984-07-31 00:00:00
abstract::A particle obtained by nuclease digestion of nucleohistone complexes prepared by direct mixing of histones with DNA in 0.15 M NaCl was indistinguishable by composition and physical properties from nucleosome cores prepared under the same conditions from nucleohistone preannealed in 0.6 M NaCl. We show here that differ...
journal_title:Biochemistry
pub_type: 杂志文章
doi:10.1021/bi00476a025
更新日期:1990-06-19 00:00:00