2021
Chemoselective restoration of para-azido-phenylalanine at multiple sites in proteins
Arranz-Gibert P, Vanderschuren K, Haimovich A, Halder A, Gupta K, Rinehart J, Isaacs FJ. Chemoselective restoration of para-azido-phenylalanine at multiple sites in proteins. Cell Chemical Biology 2021, 29: 1046-1052.e4. PMID: 34965380, PMCID: PMC10173106, DOI: 10.1016/j.chembiol.2021.12.002.Peer-Reviewed Original ResearchConceptsProtein functionalizationChemical moietiesDiverse chemical moietiesDiverse chemical groupsSite-specific incorporationClick reactionOff-target modificationsDiazotransfer reactionAzide moietyAzide reductionNonstandard amino acidsChemical groupsFunctionalizationMaterials scienceMoietyPAZFFunction of proteinsReactionAzideBroad applicationsPhysiological conditionsParaChemistryAmino acidsKey limitations
2013
Rapid mass spectrometric determination of disulfide connectivity in peptides and proteins
Bhattacharyya M, Gupta K, Gowd KH, Balaram P. Rapid mass spectrometric determination of disulfide connectivity in peptides and proteins. Molecular Omics 2013, 9: 1340-1350. PMID: 23467691, DOI: 10.1039/c3mb25534d.Peer-Reviewed Original ResearchConceptsMass spectrometric fragmentationDisulfide connectivityRapid mass spectrometric determinationPeptide toxinsNatural peptide toxinsMass spectrometric determinationCID fragmentationSpectrometric determinationNatural peptidesProteolytic nickProteolytic peptidesDirect fragmentationUnambiguous characterisationDisulfide linkagesSubsequent determinationSynthetic analoguesRapid screeningMS profilesDisulfide crosslinksStraightforward approachNative disulfidesDeterminationPeptidesFoldamersIntact polypeptide