PMID- 7816810 OWN - NLM STAT- MEDLINE DCOM- 19950209 LR - 20190501 IS - 0027-8424 (Print) IS - 1091-6490 (Electronic) IS - 0027-8424 (Linking) VI - 92 IP - 1 DP - 1995 Jan 3 TI - Optical mapping of site-directed cleavages on single DNA molecules by the RecA-assisted restriction endonuclease technique. PG - 165-9 AB - Fluorescence in situ hybridization (FISH) resolution has advanced because newer techniques use increasingly decondensed chromatin. FISH cannot analyze restriction enzyme cutting sites due to limitations of the hybridization and detection technologies. The RecA-assisted restriction endonuclease (RARE) technique cleaves chromosomal DNA at a single EcoRI site within a given gene or selected sequence. We recently described a mapping technique, optical mapping, which uses fluorescence microscopy to produce high-resolution restriction maps rapidly by directly imaging restriction digestion cleavage events occurring on single deproteinized DNA molecules. Ordered maps are then constructed by noting fragment order and size, using several optically based techniques. Since we also wanted to map arbitrary sequences and gene locations, we combined RARE with optical mapping to produce site-specific visible EcoRI restriction cleavage sites on single DNA molecules. Here we describe this combined method, named optical RARE, and its initial application to mapping gene locations on yeast chromosomes. FAU - Wang, Y K AU - Wang YK AD - W.M. Keck Laboratory for Biomolecular Imaging, Department of Chemistry, New York University, New York 10003. FAU - Huff, E J AU - Huff EJ FAU - Schwartz, D C AU - Schwartz DC LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Proc Natl Acad Sci U S A JT - Proceedings of the National Academy of Sciences of the United States of America JID - 7505876 RN - 0 (DNA, Fungal) RN - 0 (Oligodeoxyribonucleotides) RN - EC 2.7.7.- (Rec A Recombinases) RN - EC 3.1.21.- (Deoxyribonuclease EcoRI) SB - IM GS - ERG16 GS - LEU2 GS - THR4 MH - Base Sequence MH - Binding Sites MH - Candida albicans/*genetics MH - Chromosomes, Fungal MH - DNA, Fungal/*chemistry/*metabolism MH - Deoxyribonuclease EcoRI MH - *Genes, Fungal MH - In Situ Hybridization, Fluorescence/methods MH - Microscopy, Fluorescence/methods MH - Molecular Sequence Data MH - Oligodeoxyribonucleotides MH - *Rec A Recombinases/metabolism MH - *Restriction Mapping MH - Saccharomyces cerevisiae/*genetics PMC - PMC42838 EDAT- 1995/01/03 00:00 MHDA- 1995/01/03 00:01 PMCR- 1995/07/03 CRDT- 1995/01/03 00:00 PHST- 1995/01/03 00:00 [pubmed] PHST- 1995/01/03 00:01 [medline] PHST- 1995/01/03 00:00 [entrez] PHST- 1995/07/03 00:00 [pmc-release] AID - 10.1073/pnas.92.1.165 [doi] PST - ppublish SO - Proc Natl Acad Sci U S A. 1995 Jan 3;92(1):165-9. doi: 10.1073/pnas.92.1.165.