UniProt functional annotation for P54368



	UniProt functional annotation for P54368

UniProt code: P54368.

Organism: Homo sapiens (Human).

Taxonomy: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo.

Function: Ornithine decarboxylase (ODC) antizyme protein that negatively regulates ODC activity and intracellular polyamine biosynthesis and uptake in response to increased intracellular polyamine levels. Binds to ODC monomers, inhibiting the assembly of the functional ODC homodimer, and targets the monomers for ubiquitin- independent proteolytic destruction by the 26S proteasome (PubMed:17900240, PubMed:26305948, PubMed:26443277). Triggers ODC degradation by inducing the exposure of a cryptic proteasome- interacting surface of ODC (PubMed:26305948). Stabilizes AZIN2 by interfering with its ubiquitination (PubMed:17900240). Also inhibits cellular uptake of polyamines by inactivating the polyamine uptake transporter. SMAD1/OAZ1/PSMB4 complex mediates the degradation of the CREBBP/EP300 repressor SNIP1. Involved in the translocation of AZIN2 from ER-Golgi intermediate compartment (ERGIC) to the cytosol (PubMed:12097147). {ECO:0000269|PubMed:12097147, ECO:0000269|PubMed:17900240, ECO:0000269|PubMed:26305948, ECO:0000269|PubMed:26443277}.

Subunit: Interacts with ODC1 and thereby sterically blocks ODC homodimerization (PubMed:26305948, PubMed:26443277). Forms a ternary complex with PSMB4 and OAZ1 before PSMB4 is incorporated into the 20S proteasome (PubMed:12097147). Interacts with AZIN2; this interaction disrupts the interaction between the antizyme and ODC1 (PubMed:17900240). Interacts with FAM171A1 (PubMed:30312582). {ECO:0000269|PubMed:12097147, ECO:0000269|PubMed:17900240, ECO:0000269|PubMed:26305948, ECO:0000269|PubMed:26443277, ECO:0000269|PubMed:30312582}.

Induction: Induced by a ribosomal frameshifting mechanism in response to increased levels of intracellular polyamines. {ECO:0000250|UniProtKB:P54370}.

Similarity: Belongs to the ODC antizyme family. {ECO:0000305}.

Sequence caution: Sequence=BAA11374.1; Type=Erroneous initiation; Evidence={ECO:0000305};

Annotations taken from UniProtKB at the EBI.


Organism:		Homo sapiens (Human).
Taxonomy:		Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo.



Function:		Ornithine decarboxylase (ODC) antizyme protein that negatively regulates ODC activity and intracellular polyamine biosynthesis and uptake in response to increased intracellular polyamine levels. Binds to ODC monomers, inhibiting the assembly of the functional ODC homodimer, and targets the monomers for ubiquitin- independent proteolytic destruction by the 26S proteasome (PubMed:17900240, PubMed:26305948, PubMed:26443277). Triggers ODC degradation by inducing the exposure of a cryptic proteasome- interacting surface of ODC (PubMed:26305948). Stabilizes AZIN2 by interfering with its ubiquitination (PubMed:17900240). Also inhibits cellular uptake of polyamines by inactivating the polyamine uptake transporter. SMAD1/OAZ1/PSMB4 complex mediates the degradation of the CREBBP/EP300 repressor SNIP1. Involved in the translocation of AZIN2 from ER-Golgi intermediate compartment (ERGIC) to the cytosol (PubMed:12097147). {ECO:0000269\|PubMed:12097147, ECO:0000269\|PubMed:17900240, ECO:0000269\|PubMed:26305948, ECO:0000269\|PubMed:26443277}.


Subunit:		Interacts with ODC1 and thereby sterically blocks ODC homodimerization (PubMed:26305948, PubMed:26443277). Forms a ternary complex with PSMB4 and OAZ1 before PSMB4 is incorporated into the 20S proteasome (PubMed:12097147). Interacts with AZIN2; this interaction disrupts the interaction between the antizyme and ODC1 (PubMed:17900240). Interacts with FAM171A1 (PubMed:30312582). {ECO:0000269\|PubMed:12097147, ECO:0000269\|PubMed:17900240, ECO:0000269\|PubMed:26305948, ECO:0000269\|PubMed:26443277, ECO:0000269\|PubMed:30312582}.
Induction:		Induced by a ribosomal frameshifting mechanism in response to increased levels of intracellular polyamines. {ECO:0000250\|UniProtKB:P54370}.
Similarity:		Belongs to the ODC antizyme family. {ECO:0000305}.
Sequence caution:		Sequence=BAA11374.1; Type=Erroneous initiation; Evidence={ECO:0000305};