RO52_HUMAN

Source: PM19886704
PM23856902
Marked as 'Membrane associated protein'
Confidence: low (only semi-automatic identification from reviews) Search PubMed for
(RBC AND this entry)
Gene names: TRIM21 , RNF81, RO52, SSA1
Protein names and data: RO52_HUMAN , E3 ubiquitin-protein ligase TRIM21; 6.3.2.- , 52 kDa Ro protein; 52 kDa ribonucleoprotein autoantigen Ro/SS-A; RING finger protein 81; Ro(SS-A); Sjoegren syndrome type A antigen; SS-A; Tripartite motif-containing protein 21 Lenght: 475 a.a.
Mass: 54170 Da
fasta formatted sequence
Function: E3 ubiquitin-protein ligase whose activity is dependent on E2 enzymes, UBE2D1, UBE2D2, UBE2E1 and UBE2E2. Forms a ubiquitin ligase complex in cooperation with the E2 UBE2D2 that is used not only for the ubiquitination of USP4 and IKBKB but also for its self-ubiquitination. Component of cullin-RING-based SCF (SKP1-CUL1-F-box protein) E3 ubiquitin-protein ligase complexes such as SCF(SKP2)-like complexes. A TRIM21-containing SCF(SKP2)- like complex is shown to mediate ubiquitination of CDKN1B ('Thr- 187' phosphorylated-form), thereby promoting its degradation by the proteasome. Monoubiquitinates IKBKB that will negatively regulates Tax-induced NF-kappa-B signaling. Negatively regulates IFN-beta production post-pathogen recognition by polyubiquitin- mediated degradation of IRF3. Mediates the ubiquitin-mediated proteasomal degradation of IgG1 heavy chain, which is linked to the VCP-mediated ER-associated degradation (ERAD) pathway. Promotes IRF8 ubiquitination, which enhanced the ability of IRF8 to stimulate cytokine genes transcription in macrophages. Plays a role in the regulation of the cell cycle progression. Enhances the decapping activity of DCP2. Exists as a ribonucleoprotein particle present in all mammalian cells studied and composed of a single polypeptide and one of four small RNA molecules. At least two isoforms are present in nucleated and red blood cells, and tissue specific differences in RO/SSA proteins have been identified. The common feature of these proteins is their ability to bind HY RNAs.2.
Pathway: Protein modification; protein ubiquitination.
Cellular location: Cytoplasm. Nucleus. Cytoplasm, P-body. Note=Enters the nucleus upon exposure to nitric oxide. Localizes to small dot- or rod-like structures in the cytoplasm, called cytoplasmic bodies (P-body) that are located underneath the plasma membrane and also diffusely in the cytoplasm and are highly motil in cells. Cytoplasmic bodies are located along the microtubules and do not share the same cytoplasmic bodies with TRIM5. Colocalizes with DCP2 in P-body.
Tissue specificity: Isoform 1 and isoform 2 are expressed in fetal and adult heart and fetal lung.

Genetic variants

Database cross-references

UniProt: P19474
Ensembl: ENST00000254436
MIM: 109092
neXtProt: NX_P19474
Antibodypedia: P19474 (may not find the protein thus also not any antibody)
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