PMID- 16625674 OWN - NLM STAT- MEDLINE DCOM- 20070712 LR - 20060509 IS - 1439-4235 (Print) IS - 1439-4235 (Linking) VI - 7 IP - 5 DP - 2006 May 12 TI - Quantum-dot-labeled DNA probes for fluorescence in situ hybridization (FISH) in the microorganism Escherichia coli. PG - 1062-7 AB - Semiconductor quantum dots (QDs) as a kind of nonisotopic biological labeling material have many unique fluorescent properties relative to conventional organic dyes and fluorescent proteins, such as composition- and size-dependent absorption and emission, a broad absorption spectrum, photostability, and single-dot sensitivity. These properties make them a promising stable and sensitive label, which can be used for long-term fluorescent tracking and subcellular location of genes and proteins. Here, a simple approach for the construction of QD-labeled DNA probes was developed by attaching thiol-ssDNA to QDs via a metal-thiol bond. The as-prepared QD-labeled DNA probes had high dispersivity, bioactivity, and specificity for hybridization. Based on such a kind of probe with a sequence complementary to multiple clone sites in plasmid pUC18, fluorescence in situ hybridization of the tiny bacterium Escherichia coli has been realized for the first time. FAU - Wu, Sheng-Mei AU - Wu SM AD - College of Chemistry and Molecular Sciences and State Key Laboratory of Virology, Wuhan University, Wuhan 430072, P. R. China. FAU - Zhao, Xiang AU - Zhao X FAU - Zhang, Zhi-Ling AU - Zhang ZL FAU - Xie, Hai-Yan AU - Xie HY FAU - Tian, Zhi-Quan AU - Tian ZQ FAU - Peng, Jun AU - Peng J FAU - Lu, Zhe-Xue AU - Lu ZX FAU - Pang, Dai-Wen AU - Pang DW FAU - Xie, Zhi-Xiong AU - Xie ZX LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Germany TA - Chemphyschem JT - Chemphyschem : a European journal of chemical physics and physical chemistry JID - 100954211 RN - 0 (DNA Probes) RN - 0 (DNA, Single-Stranded) RN - 0 (Fluorescent Dyes) SB - IM MH - DNA Probes/*chemistry MH - DNA, Single-Stranded/chemistry MH - Electrophoresis, Agar Gel MH - Escherichia coli/*genetics/metabolism MH - Fluorescent Dyes/chemistry MH - In Situ Hybridization, Fluorescence/*instrumentation/methods MH - Microscopy, Fluorescence MH - Models, Chemical MH - Nanotechnology/*instrumentation/*methods MH - Nucleic Acid Hybridization MH - Plasmids/metabolism MH - *Quantum Dots MH - Sensitivity and Specificity MH - Time Factors EDAT- 2006/04/21 09:00 MHDA- 2007/07/13 09:00 CRDT- 2006/04/21 09:00 PHST- 2006/04/21 09:00 [pubmed] PHST- 2007/07/13 09:00 [medline] PHST- 2006/04/21 09:00 [entrez] AID - 10.1002/cphc.200500608 [doi] PST - ppublish SO - Chemphyschem. 2006 May 12;7(5):1062-7. doi: 10.1002/cphc.200500608.