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000889869 1001_ $$0P:(DE-HGF)0$$aSyllwasschy, Benjamin Franz$$b0
000889869 245__ $$aHigh-affinity binding and catalytic activity of His/Tyr-based sequences: Extending heme-regulatory motifs beyond CP
000889869 260__ $$aAmsterdam [u.a.]$$bElsevier$$c2020
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000889869 520__ $$aBackground & motivationPeptides and proteins can interact with heme through His, Tyr, or Cys in heme-regulatory motifs (HRMs). The Cys-Pro dipeptide is a well investigated HRM, but for His and Tyr such a distinct motif is currently unknown. In addition, many heme-peptide complexes, such as heme-amyloid β, can display a peroxidase-like activity, albeit there is little understanding of how the local primary and secondary coordination environment influences catalytic activity. We thus systematically evaluated a series of His- and Tyr-based peptides to identify sequence features for high-affinity heme binding and their impact on the catalytic activity of heme.MethodsWe employed solid-phase peptide synthesis to produce 58 nonapeptides, which were investigated by UV/vis, resonance Raman, and 2D NMR spectroscopy. A chromogenic assay was used to determine the catalytic activity of the heme-peptide complexes.ResultsHeme-binding affinity and binding mode were found to be dependent on the coordinating amino acid and spacer length between multiple potential coordination sites in a motif. In particular, HXH and HXXXH motifs showed strong heme binding. Analysis of the peroxidase-like activity revealed that some of these peptides and also HXXXY motifs enhance the catalytic activity of heme significantly.ConclusionsWe identify HXH, HXXXH, and HXXXY as potential new HRMs with functional properties. Several peptides displayed a strikingly high peroxidase-like activity.General significanceThe identification of HRMs allows to discover yet unknown heme-regulated proteins, and consequently, enhances our current understanding of pathologies involving labile heme.
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000889869 7001_ $$0P:(DE-HGF)0$$aBeck, Maximilian Steve$$b1
000889869 7001_ $$0P:(DE-HGF)0$$aDružeta, Ivona$$b2
000889869 7001_ $$0P:(DE-HGF)0$$aHopp, Marie-Thérèse$$b3
000889869 7001_ $$0P:(DE-HGF)0$$aRamoji, Anuradha$$b4
000889869 7001_ $$0P:(DE-HGF)0$$aNeugebauer, Ute$$b5
000889869 7001_ $$0P:(DE-HGF)0$$aNozinovic, Senada$$b6
000889869 7001_ $$0P:(DE-HGF)0$$aMenche, Dirk$$b7
000889869 7001_ $$0P:(DE-Juel1)132029$$aWillbold, Dieter$$b8$$ufzj
000889869 7001_ $$0P:(DE-HGF)0$$aOhlenschläger, Oliver$$b9
000889869 7001_ $$0P:(DE-HGF)0$$aKühl, Toni$$b10
000889869 7001_ $$0P:(DE-HGF)0$$aImhof, Diana$$b11$$eCorresponding author
000889869 773__ $$0PERI:(DE-600)2209617-6$$a10.1016/j.bbagen.2020.129603$$gVol. 1864, no. 7, p. 129603 -$$n7$$p129603 -$$tBiochimica et biophysica acta / General subjects$$v1864$$x0304-4165$$y2020
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