Photoactive, heterobifunctional cross-linking reagent. Typically, the initial reaction couples to sulfhydryl in the pH range 7.0-8.0. Second bonding occurs during UV irradiation (250 nm) via reactive nitrene. The latter bonding is rapid and non-specific.
Caution
Reducing agents such as thiols may reduce the azide to amine and should be avoided. Initial manipulations and coupling should be performed under reduced light.
The synthesis of the photochemically labile bifunctional reagent p-azidophenacyl bromide (1) is described. This compound may be covalently attached to a known site of an enzyme or other macromolecule by nucleophilic displacement at the alpha-bromo ketone moiety. Subsequent irradiation of
The Journal of biological chemistry, 275(4), 2705-2712 (2000-01-25)
The PI-SceI protein is an intein-encoded homing endonuclease that initiates the mobility of its gene by making a double strand break at a single site in the yeast genome. The PI-SceI protein splicing and endonucleolytic active sites are separately located
sigma(54)-dependent transcription requires activation by bacterial enhancer binding proteins (bEBPs). bEBPs are members of the AAA+ (ATPases associated with various cellular activities) protein family and typically form hexameric structures that are crucial for their ATPase activity. The precise mechanism by
Journal of molecular biology, 329(5), 913-929 (2003-06-12)
We present here the first detailed biochemical analysis of an archaeal restriction enzyme. PspGI shows sequence similarity to SsoII, EcoRII, NgoMIV and Cfr10I, which recognize related DNA sequences. We demonstrate here that PspGI, like SsoII and unlike EcoRII or NgoMIV
Proceedings of the National Academy of Sciences of the United States of America, 93(15), 7540-7545 (1996-07-23)
The vaccinia virus early transcription factor (VETF), a heterodimeric protein composed of 82- and 70-kDa subunits, interacts with viral early promoters at both a sequence-specific core region upstream and a sequence-independent region downstream of the RNA start site. To determine
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