TXNIP

May act as an oxidative stress mediator by inhibiting thioredoxin activity or by limiting its bioavailability (PubMed:17603038). Interacts with COPS5 and restores COPS5-induced suppression of CDKN1B stability, blocking the COPS5-mediated translocation of CDKN1B from the nucleus to the cytoplasm (By similarity). Functions as a transcriptional repressor, possibly by acting as a bridge molecule between transcription factors and corepressor complexes, and over-expression will induce G0/G1 cell cycle arrest (PubMed:12821938). Required for the maturation of natural killer cells (By similarity). Acts as a suppressor of tumor cell growth (PubMed:18541147). Inhibits the proteasomal degradation of DDIT4, and thereby contributes to the inhibition of the mammalian target of rapamycin complex 1 (mTORC1) (PubMed:21460850).

Ubiquitinated; undergoes heterotypic 'Lys-48'-/'Lys-63'-branched polyubiquitination catalyzed by ITCH and UBR5 resulting in proteasomal degradation.

Belongs to the arrestin family.

• Cytoplasm

VDUP1, TXNIP, Thioredoxin-interacting protein, Thioredoxin-binding protein 2, Vitamin D3 up-regulated protein 1

• entrezGene:10628
• omim:606599
• swissprot:Q9H3M7

Proteins

Metabolism

43661Da