Use of mass spectrometry to probe the nucleophilicity of cysteinyl residues of prolyl hydroxylase domain 2.
Prolyl hydroxylase domain 2 (PHD2) plays an important role in hypoxic sensing in humans. Here we report studies on the reactivity of cysteinyl residues of the catalytic domain of PHD2 using an approach in which nondenaturing electrospray ionization-mass spectrometry (ESI-MS) analyses were combined w...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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2009
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| _version_ | 1826299832496553984 |
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| author | Mecinović, J Chowdhury, R Flashman, E Schofield, C |
| author_facet | Mecinović, J Chowdhury, R Flashman, E Schofield, C |
| author_sort | Mecinović, J |
| collection | OXFORD |
| description | Prolyl hydroxylase domain 2 (PHD2) plays an important role in hypoxic sensing in humans. Here we report studies on the reactivity of cysteinyl residues of the catalytic domain of PHD2 using an approach in which nondenaturing electrospray ionization-mass spectrometry (ESI-MS) analyses were combined with the use of a thiol library and residue substitution. Among the seven cysteinyl residues of the PHD2 catalytic domain, Cys201 was found to be predominantly modified by thiols or N-ethylmaleimide. Selective modification of Cys201 was further demonstrated with methanethiosulfonate, a spin-labeled probe. The modified PHD2 will be useful in electron paramagnetic resonance studies on PHD2. The results demonstrate the use of a combined library/residue substitution/ESI-MS approach for analyzing residue reactivity. |
| first_indexed | 2024-03-07T05:07:57Z |
| format | Journal article |
| id | oxford-uuid:da944b2b-1525-44cd-88e6-70e84b9b2648 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:07:57Z |
| publishDate | 2009 |
| record_format | dspace |
| spelling | oxford-uuid:da944b2b-1525-44cd-88e6-70e84b9b26482022-03-27T09:04:09ZUse of mass spectrometry to probe the nucleophilicity of cysteinyl residues of prolyl hydroxylase domain 2.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:da944b2b-1525-44cd-88e6-70e84b9b2648EnglishSymplectic Elements at Oxford2009Mecinović, JChowdhury, RFlashman, ESchofield, CProlyl hydroxylase domain 2 (PHD2) plays an important role in hypoxic sensing in humans. Here we report studies on the reactivity of cysteinyl residues of the catalytic domain of PHD2 using an approach in which nondenaturing electrospray ionization-mass spectrometry (ESI-MS) analyses were combined with the use of a thiol library and residue substitution. Among the seven cysteinyl residues of the PHD2 catalytic domain, Cys201 was found to be predominantly modified by thiols or N-ethylmaleimide. Selective modification of Cys201 was further demonstrated with methanethiosulfonate, a spin-labeled probe. The modified PHD2 will be useful in electron paramagnetic resonance studies on PHD2. The results demonstrate the use of a combined library/residue substitution/ESI-MS approach for analyzing residue reactivity. |
| spellingShingle | Mecinović, J Chowdhury, R Flashman, E Schofield, C Use of mass spectrometry to probe the nucleophilicity of cysteinyl residues of prolyl hydroxylase domain 2. |
| title | Use of mass spectrometry to probe the nucleophilicity of cysteinyl residues of prolyl hydroxylase domain 2. |
| title_full | Use of mass spectrometry to probe the nucleophilicity of cysteinyl residues of prolyl hydroxylase domain 2. |
| title_fullStr | Use of mass spectrometry to probe the nucleophilicity of cysteinyl residues of prolyl hydroxylase domain 2. |
| title_full_unstemmed | Use of mass spectrometry to probe the nucleophilicity of cysteinyl residues of prolyl hydroxylase domain 2. |
| title_short | Use of mass spectrometry to probe the nucleophilicity of cysteinyl residues of prolyl hydroxylase domain 2. |
| title_sort | use of mass spectrometry to probe the nucleophilicity of cysteinyl residues of prolyl hydroxylase domain 2 |
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