Ancient origin of RNA editing in kinetoplastid protozoa.

نویسندگان

  • L Simpson
  • D A Maslov
چکیده

A rooted phylogenetic tree of the kinetoplastid protozoa has been constructed that, together with a comparative analysis of editing of several genes, leads to the surprising conclusion that extensive or pan-editing with multiple overlapping guide RNAs is more ancient than 5'-editing. The mechanism of editing is still uncertain, but multiple ribonucleoprotein complexes have been identified that contain components of the enzymatic machinery.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

RNA editing and mitochondrial genomic organization in the cryptobiid kinetoplastid protozoan Trypanoplasma borreli.

The bodonids and cryptobiids represent an early diverged sister group to the trypanosomatids among the kinetoplastid protozoa. The trypanosome type of uridine insertion-deletion RNA editing was found to occur in the cryptobiid fish parasite Trypanoplasma borreli. A pan-edited ribosomal protein, S12, and a novel 3'- and 5'-edited cytochrome b, in addition to an unedited cytochrome oxidase III ge...

متن کامل

RNA editing and the mitochondrial cryptogenes of kinetoplastid protozoa.

The term “RNA editing” was initially introduced to describe a process resulting in the addition of nongenomitally encoded uridine residues (U’s) to mitochondrial mRNAs in the kinetoplastid protozoa (Benne et al., 1986), but has recently been used to describe other processes involving modification of RNA in other organisms (Powell et al., 1987; Chen et al., 1987; Thomas et al., 1988). We would l...

متن کامل

U-insertion/deletion Edited Sequence Database

Uridine insertion/deletion RNA editing is a post-transcriptional RNA modification occurring in the mitochondria of kinetoplastid protozoa. The U-insertion/deletion Edited Sequence Database is a compilation of mitochondrial genes and edited mRNAs from five kinetoplastid species. It contains separate files with the DNA, mRNA (both unedited and edited) and predicted protein sequences, as well as a...

متن کامل

DEAH-RHA helicase•Znf cofactor systems in kinetoplastid RNA editing and evolutionarily distant RNA processes

Multi-zinc finger proteins are an emerging class of cofactors in DEAH-RHA RNA helicases across highly divergent eukaryotic lineages. DEAH-RHA helicase•zinc finger cofactor partnerships predate the split of kinetoplastid protozoa, which include several human pathogens, from other eukaryotic lineages 100-400 Ma. Despite a long evolutionary history, the prototypical DEAH-RHA domains remain highly ...

متن کامل

Dyskinetoplastic Trypanosoma brucei contains functional editing complexes.

Mitochondrial pre-mRNAs undergo posttranscriptional RNA editing as directed by small guide RNAs (gRNAs) to produce functional mRNAs in kinetoplastid protozoa. The pre-mRNAs and gRNAs are encoded in the maxicircle and minicircle components, respectively, of the kinetoplastid mitochondrial DNA (kDNA), and editing is catalyzed by a multienzyme protein complex. Trypanosoma evansi AnTat3/3, which la...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • Current opinion in genetics & development

دوره 4 6  شماره 

صفحات  -

تاریخ انتشار 1994