Betermier M, Alazard R, Ragueh F, Roulet E, Toussaint A, Chandler M. Phage Mu transposase: deletion of the carboxy-terminal end does not abolish DNA-binding activity.
MOLECULAR & GENERAL GENETICS : MGG 1987;
210:77-85. [PMID:
2828889 DOI:
10.1007/bf00337761]
[Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We demonstrate that a specific site on the transposase protein, pA, of bacteriophage Mu is highly susceptible to proteolytic cleavage. Cleavage is observed in a minicell system on solubilisation with the non-ionic detergent Triton X-100 or following addition of a solubilised minicell preparation to pA synthesised in a cell-free coupled transcription/translation system. Cleavage occurs at the carboxy-terminal end of the protein and generates a truncated polypeptide of 64 kDa, pA*, which retains some of the DNA-binding properties of pA. These results suggest that pA may be divided into functional domains for DNA binding and for interaction with the proteins involved in phage replication.
Collapse