UV light-induced duplex-to-duplex crosslinking of DNA molecules in aqueous ethanol solutions

. 1998 Apr ; 67 (4) : 386-90.

Jazyk angličtina Země Spojené státy americké Médium print

Typ dokumentu časopisecké články, práce podpořená grantem

Perzistentní odkaz   https://www.medvik.cz/link/pmid09559582

Ultraviolet light is known to generate crosslinks between the complementary strands of DNA and between DNA and proteins. Here we demonstrate that the UV light also crosslinks DNA duplexes to other DNA duplexes. However, the duplex-to-duplex crosslinks only appear in the presence of about 75% (vol/vol) ethanol plus a millimolar or submillimolar concentration of monovalent or divalent cations, e.g. 2 mM Na+. Methanol or formamide are ineffective. The present observations provide a direct means to detect physical contacts of DNA molecules or their parts, e.g. during recombination. It is remarkable that the solution conditions leading to the duplex-to-duplex UV light-induced crosslink formation are the same as those inducing the B-to-A conformational transition of DNA.

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. 2005 Jan 07 ; 33 (1) : e5. [epub] 20050107

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