期刊
BIOCONJUGATE CHEMISTRY
卷 23, 期 12, 页码 2329-2334出版社
AMER CHEMICAL SOC
DOI: 10.1021/bc300430k
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资金
- National Science Foundation [CHE 0848234, CHE 0958457, CMMI-0957834]
- NYU Cancer Institute
- Office of Naval Research [N000014-09-1-118]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0848234] Funding Source: National Science Foundation
Pyridoxal-5'-phosphate (PLP) represents an active form of Vitamin B-6 that shows relatively fast imine formation with hydrazines under physiological conditions without the need of a catalyst. A convenient phosphate/amine conjugation protocol was developed to covalently link PLP to proteins, affording proteins capable of hydrazone formation with bioorthogonal hydrazinyl functional groups. Thus, the lectin Concanavalin A (Con A) was labeled with PLP. Pretreatment with fluorescein hydrazide gave dye-labeled Con A that labeled cell surfaces efficiently. Alternatively, pretargeting was achieved by labeling cells with Con A-PLP, then treatment in vitro with Alexa Fluor 488 hydrazide.
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