Highly selective affinity labelling of RNA polymerase B (II) from wheat germ.

Autor: Grachev MA, Hartmann GR, Maximova TG, Mustaev AA, Schäffner AR, Sieber H, Zaychikov EF
Jazyk: angličtina
Zdroj: FEBS letters [FEBS Lett] 1986 May 12; Vol. 200 (2), pp. 287-90.
DOI: 10.1016/0014-5793(86)81154-1
Abstrakt: DNA-dependent RNA polymerase B (II) from wheat germ was modified by incubation with 4-[N-(beta-hydroxyethyl)-N-methyl]benzaldehyde esters of AMP, ADP or ATP, followed by reduction with NaBH4. Reaction of the modified enzyme with [alpha-32P]UTP in the presence of various DNA templates led to a highly selective affinity labelling of the subunit with Mr 140 000 by covalently linked ApU. Labelling was inhibited by 1 microgram/ml alpha-amanitin.
Databáze: MEDLINE