- obsolete cerevisin activity
OBSOLETE. Catalysis of the hydrolysis of proteins with broad specificity, and of BZ-Arg-OET > Ac-Tyr-OET. Does not hydrolyze peptide amides.
- ATF1-ATF4 transcription factor complex
Transcription factor complex consisting of ATF1 and ATF4 subunits that is capable of binding to cAMP response element (CRE) (consensus: 5'-GTGACGT[AC][AG]-3') of the GRP78 (HSPA5) promoter. Involved in the ER stress response pathway.
- obsolete caspase-1 activity
OBSOLETE. Catalysis of the release of interleukin 1-beta by specific cleavage of Asp116-Ala117 and Asp27-Gly28 bonds in precursor. Enzymes with this function can also hydrolyze the terminal bond in the small-molecule substrate, Ac-Tyr-Val-Ala-Asp-NHMec.
- ATF4-CREB1 transcription factor complex
Transcription factor complex consisting of ATF4 and CREB1 subunits that is capable of binding to cAMP response element (CRE) (consensus: 5'-GTGACGT[AC][AG]-3') as part of the positive regulation of transcription. Regulatory targets include the GRP78 (HSPA5) promoter in humans, whose activation by this complex is part of the ER stress response pathway.
- U12-type spliceosomal complex
Any spliceosomal complex that forms during the splicing of a messenger RNA primary transcript to excise an intron; the series of U12-type spliceosomal complexes is involved in the splicing of the majority of introns that contain atypical AT-AC terminal dinucleotides, as well as other non-canonical introns. The entire splice site signal, not just the terminal dinucleotides, is involved in determining which spliceosome utilizes the site.
- UBR1-RAD6 ubiquitin ligase complex
A ubiquitin ligase complex consisting of UBR1 and RAD6 components. It polyubiquitinates proteins containing non-acetylated N-terminal residues causing their subsequent degradation by the proteasome as part of the Ac/N-End Rule pathway. It recognizes non-acetylated N-terminal methionine if it is followed by a hydrophobic residue. Additionally, it acts in an N-end rule independent manner as a component of a novel quality control pathway for proteins synthesized on cytosolic ribosomes.