Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:3.1.30.2 (endonuclease)
 18,621 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Methylation of foreign and/or repeated sequences in the filamentous fungus Neurospora crassa is believed to be directed against invading transposable elements. To test this hypothesis, the fate of a transposon in N. crassa was investigated. Vectors were constructed which carried the transposon Restless, an active class-II element isolated from the fungus Tolypocladium inflatum. These vectors were introduced into N. crassa strains by protoplast transformation. Two strategies were employed: (1) ectopic multi-copy integration, and (2) site-specific single-copy integration at the his-3 locus. All ectopic transformants exhibited strong methylation as confirmed by Southern hybridization of genomic DNA digested with the methylation-sensitive endonuclease Sau3AI and the methylation-insensitive endonuclease NdeII. Single copies of Restless integrated at the his-3 locus were not methylated. These results are discussed with respect to non-RIP methylation and potential consequences for gene-tagging strategies based on the use of Restless.
 ...
PMID:Methylation of the foreign transposon Restless in vegetative mycelia of Neurospora crassa. 1079 77