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Identification of the Protein Glycation Sites in Human Myoglobin as Rapidly Induced by d-Ribose

Protein glycation is an important protein post-translational modification and is one of the main pathogenesis of diabetic angiopathy. Other than glycated hemoglobin, the protein glycation of other globins such as myoglobin (Mb) is less studied. The protein glycation of human Mb with ribose has not b...

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Detalles Bibliográficos
Autores principales: Liu, Jing-Jing, You, Yong, Gao, Shu-Qin, Tang, Shuai, Chen, Lei, Wen, Ge-Bo, Lin, Ying-Wu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8512392/
https://www.ncbi.nlm.nih.gov/pubmed/34641382
http://dx.doi.org/10.3390/molecules26195829
Descripción
Sumario:Protein glycation is an important protein post-translational modification and is one of the main pathogenesis of diabetic angiopathy. Other than glycated hemoglobin, the protein glycation of other globins such as myoglobin (Mb) is less studied. The protein glycation of human Mb with ribose has not been reported, and the glycation sites in the Mb remain unknown. This article reports that d-ribose undergoes rapid protein glycation of human myoglobin (HMb) at lysine residues (K34, K87, K56, and K147) on the protein surface, as identified by ultra-high performance liquid chromatography-mass spectrometry (UHPLC-MS) and electrospray ionization tandem mass spectrometry (ESI-MS/MS). Moreover, glycation by d-ribose at these sites slightly decreased the rate of the met heme (Fe(III)) in reaction with H(2)O(2) to form a ferryl heme (Fe(IV)=O). This study provides valuable insight into the protein glycation by d-ribose and provides a foundation for studying the structure and function of glycated heme proteins.