Search results for "Photoaffinity cross-linking"

showing 3 items of 3 documents

The Low-Affinity ATP Binding Site of the Escherichia coli SecA Dimer Is Localized at the Subunit Interface

1997

The homodimeric SecA protein is the ATP-dependent force generator in the Escherichia coli precursor protein translocation cascade. SecA contains two essential nucleotide binding sites (NBSs), i.e., NBS1 and NBS2 that hind ATP with high and low affinity, respectively. The photoactivatable bifunctional cross-linking agent 3'-arylazido-8-azidoadenosine 5'-triphosphate (diN(3)ATP) was used to investigate the spatial arrangement of the nucleotide binding sites of SecA, DiN(3)ATP is an authentic ATP analogue as it supports SecA-dependent precursor protein translocation and translocation ATPase, UV-induced photo-cross-linking of the diN(3)ATP-bound SecA results in the formation of stable dimeric s…

AzidesUltraviolet RaysProtein subunitATPaseDimerMutantPhotoaffinity LabelsBiologymedicine.disease_causeESSENTIAL COMPONENTenvironment and public healthBiochemistryBACILLUS-SUBTILISchemistry.chemical_compoundAdenosine TriphosphateBacterial ProteinsPROTON MOTIVE FORCEEscherichia colimedicinePRECURSOR PROTEIN TRANSLOCATIONNucleotideBinding siteEscherichia coliAdenosine Triphosphataseschemistry.chemical_classificationBinding SitesSecA ProteinsNucleotidesChemiosmosisEscherichia coli ProteinsMembrane Transport ProteinsPHOTOAFFINITY CROSS-LINKINGCross-Linking ReagentschemistryBiochemistryMEMBRANE-VESICLES REQUIRESPLASMA-MEMBRANE3'-ARYLAZIDO-BETA-ALANYL-8-AZIDO ATPCYTOPLASMIC MEMBRANEbiology.proteinPREPROTEIN TRANSLOCASEbacteriaDimerizationSEC Translocation ChannelsBiochemistry
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2,8-Diazido-ATP — a short-length bifunctional photoaffinity label for photoaffinity cross-linking of a stable F1 in ATP synthase (from thermophilic b…

1995

Abstract To demonstrate the direct interfacial position of nucleotide binding sites between subunits of proteins we have synthesized the bifunctional photoaffinity label 2,8-diazidoadenosine 5′-triphosphate (2,8-DiN3ATP). UV irradiation of the F1-ATPase (TF1) from the thermophilic bacterium PS3 in the presence of 2,8-DiN3ATP results in a nucleotide-dependent inactivation of the enzyme and in a nucleotide-dependent formation of α-β crosslinks. The results confirm an interfacial localization of all the nucleotide binding sites on TF1.

Models MolecularAzidesNucleotide binding siteLightStereochemistryImmunoblottingBiophysicsDirect interfacial localizationShort lengthBiochemistry8-azidoadenosine 5'-triphosphatechemistry.chemical_compoundAdenosine TriphosphateStructural BiologyGeneticsNucleotide binding sitesBifunctionalMolecular BiologyThermophilic bacterium PS3Photoaffinity cross-linkingchemistry.chemical_classificationATP synthasebiologyBacteriaThermophileAffinity LabelsCell BiologyProton-Translocating ATPasesEnzymeCross-Linking ReagentsBiochemistrychemistrybiology.proteinF1-ATPase: Short-length bifunctional photoaffinity labelFEBS Letters
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Photoaffinity cross-linking of F1ATPase from spinach chloroplasts by 3'-arylazido-beta-alanyl-8-azido ATP.

1994

UV irradiation of the ATPase (CF1) from spinach chloroplasts in the presence of 3'-arylazido-beta-alanyl-8-azido ATP (8,3'-DiN3ATP) results in a nucleotide-dependent inactivation of the enzyme and in a nucleotide-dependent formation of alpha-beta cross-links. The results demonstrate an interfacial localization of the nucleotide binding sites on CF1.

Nucleotide binding siteAzidesChloroplastsStereochemistryPhotochemistryAffinity labelATPaseBiophysicsBiochemistryChloroplastF1ATPasechemistry.chemical_compoundAdenosine TriphosphateStructural BiologyVegetablesGeneticsBinding siteChenopodiaceaeInterfacial localizationMolecular BiologyPhotoaffinity cross-linkingchemistry.chemical_classificationbiologyfood and beveragesAffinity LabelsCell Biologybiology.organism_classificationChloroplastProton-Translocating ATPasesEnzymeCross-Linking Reagentschemistrybiology.proteinSpinach chloroplastAdenosine triphosphateFEBS letters
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