JH
评审
Javeena Hussain
  • Post-Doc, RTI International
研究方向
  • Biochemistry, medicinal chemistry, chemical biology, cancer drug discovery, Drug Discovery
HPLC Analysis of tRNA‐Derived Nucleosides
HPLC分析tRNA衍生核苷
作者:Xingxing Chen and Fu Xu日期:02/20/2025,浏览量:423,Q&A: 0

Transfer RNAs (tRNAs), the essential adapter molecules in protein translation, undergo various post-transcriptional modifications. These modifications play critical roles in regulating tRNA folding, stability, and codon–anticodon interactions, depending on the modified position. Methods for detecting modified nucleosides in tRNAs include isotopic labeling combined with chromatography, antibody-based techniques, mass spectrometry, and high-throughput sequencing. Among these, high-performance liquid chromatography (HPLC) has been a cornerstone technique for analyzing modified nucleosides for decades. In this protocol, we provide a detailed, streamlined approach to purify and digest tRNAs from yeast cells and analyze the resulting nucleosides using HPLC. By assessing UV absorbance spectra and retention times, modified nucleosides can be reliably quantified with high accuracy. This method offers a simple, fast, and accessible alternative for studying tRNA modifications, especially when advanced technologies are unavailable.

From Llama to Nanobody: A Streamlined Workflow for the Generation of Functionalised VHHs
从美洲驼到纳米体:生成功能化VHHs的简化工作流程

Nanobodies are recombinant antigen-specific single domain antibodies (VHHs) derived from the heavy chain–only subset of camelid immunoglobulins. Their small molecular size, facile expression, high affinity, and stability have combined to make them unique targeting reagents with numerous applications in the biomedical sciences. From our work in producing nanobodies to over sixty different proteins, we present a standardised workflow for nanobody discovery from llama immunisation, library building, panning, and small-scale expression for prioritisation of binding clones. In addition, we introduce our suites of mammalian and bacterial vectors, which can be used to functionalise selected nanobodies for various applications such as in imaging and purification.


Key features

• Standardise the process of building nanobody libraries and finding nanobody binders so that it can be repeated in any lab with reasonable equipment.

• Introduce two suites of vectors to functionalise nanobodies for production in either bacterial or mammalian cells.


Graphical overview