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BI3 protein (Saccharomyces cerevisiae) - STRING interaction network
"BI3" - Mitochondrial mRNA maturase, forms a complex with Mrs1p to mediate splicing of the bI3 intron of the COB gene in Saccharomyces cerevisiae
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BI3Mitochondrial mRNA maturase, forms a complex with Mrs1p to mediate splicing of the bI3 intron of the COB gene; encoded by both exon and intron sequences of partially processed COB mRNA; Mitochondrial mRNA maturase required for splicing of intron 3 of the cytochrome b (COB) gene, containing its own coding sequence. In vivo splicing requires the formation of a ribonucleoprotein complex together with the imported mitochondrial RNA-splicing protein MRS1. The complex seems to stimulate the intrinsic ribozyme activity of intron bI3 through binding to and stabilizing specific secondary and te [...] (517 aa)    
Predicted Functional Partners:
MRS1
Protein required for the splicing of two mitochondrial group I introns (BI3 in COB and AI5beta in COX1); forms a splicing complex, containing four subunits of Mrs1p and two subunits of the BI3-encoded maturase, that binds to the BI3 RNA; Function in mitochondrial RNA splicing in the excision of mitochondrial group I introns aI5 beta from COX1 and bI3 from COB transcripts and thus would be involved in obtaining the correct structure of the intron, to allow the RNA catalyzed reactions to occur (363 aa)
       
 
  0.969
COX1
Subunit I of cytochrome c oxidase, which is the terminal member of the mitochondrial inner membrane electron transport chain; one of three mitochondrially-encoded subunits; Cytochrome c oxidase is the component of the respiratory chain that catalyzes the reduction of oxygen to water. Subunits 1- 3 form the functional core of the enzyme complex. CO I is the catalytic subunit of the enzyme. Electrons originating in cytochrome c are transferred via the copper A center of subunit 2 and heme A of subunit 1 to the bimetallic center formed by heme A3 and copper B (534 aa)
           
  0.829
AI4
Endonuclease I-SceII, encoded by a mobile group I intron within the mitochondrial COX1 gene; intron is normally spliced by the BI4p maturase but AI4p can mutate to acquire the same maturase activity; Mitochondrial DNA endonuclease involved in intron homing. It introduces a specific double-strand break at the junction of the two exons a4-a5 of the COX1 gene and thus mediates the insertion of an intron, containing its own coding sequence (group I intron), into an intronless gene. Recognizes with limited specificity and cleaves the sequence 5’-TTTGGTCACCCTGAAGTA-3’. The protein may acquir [...] (556 aa)
           
  0.792
AI3
Endonuclease I-SceIII, encoded by a mobile group I intron within the mitochondrial COX1 gene; Mitochondrial DNA endonuclease involved in intron homing. It introduces a specific double-strand break in the DNA of the COX1 gene and thus mediates the insertion of an intron, containing its own coding sequence (group I intron), into an intronless gene. Recognizes with high specificity and cleaves the sequence 5’-GGTTTTGGTAACTATTTATTAC-3’ (415 aa)
           
  0.749
AI1
Reverse transcriptase required for splicing of the COX1 pre-mRNA, encoded by a mobile group II intron within the mitochondrial COX1 gene (834 aa)
           
  0.737
AI2
Reverse transcriptase required for splicing of the COX1 pre-mRNA, encoded by a mobile group II intron within the mitochondrial COX1 gene (854 aa)
           
  0.730
CBP2
Mitochondrial protein required for splicing of the group I intron aI5 of the COB pre-mRNA, binds to the RNA to promote splicing; also involved in but not essential for splicing of the COB bI2 intron and the intron in the 21S rRNA gene; Appears to be specifically required for the splicing of the terminal intron (bI5) of the cytochrome b pre-mRNA. Can also stimulates the splicing of the omega intron of the precursor of large ribosomal RNA (630 aa)
           
  0.727
MSS116
DEAD-box protein required for efficient splicing of mitochondrial Group I and II introns; non-polar RNA helicase that also facilities strand annealing; ATP-dependent RNA helicase required for mitochondrial splicing of group I and II introns. Specifically involved in the ATP-dependent splicing of the bl1 intron of COB. Also required for efficient mitochondrial translation (664 aa)
           
  0.697
AI5_BETA
Protein of unknown function, encoded within an intron of the mitochondrial COX1 gene; translational initiation codon is predicted to be ATA rather than ATG; Mitochondrial DNA endonuclease involved in intron homing (354 aa)
           
  0.640
NAM2
Mitochondrial leucyl-tRNA synthetase, also has a direct role in splicing of several mitochondrial group I introns; indirectly required for mitochondrial genome maintenance (894 aa)
           
  0.626
Your Current Organism:
Saccharomyces cerevisiae
NCBI taxonomy Id: 4932
Other names: Candida robusta, Pachytichospora, S. cerevisiae, Saccharomyces, Saccharomyces capensis, Saccharomyces cerevisiae, Saccharomyces italicus, Saccharomyces oviformis, Saccharomyces uvarum var. melibiosus, lager beer yeast, yeast
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