The function of TNIP2 (TNFAIP3 interacting protein 2, Ensembl gene identifier ENSG00000168884) is as follows. Inhibits NF-kappa-B activation by blocking the interaction of RIPK1 with its downstream effector NEMO/IKBKG. Forms a ternary complex with NFKB1 and MAP3K8 but appears to function upstream of MAP3K8 in the TLR4 signaling pathway that regulates MAP3K8 activation. Involved in activation of the MEK/ERK signaling pathway during innate immune response; this function seems to be stimulus- and cell type specific. Required for stability of MAP3K8. Involved in regulation of apoptosis in endothelial cells; promotes TEK agonist-stimulated endothelial survival. May act as transcriptional coactivator when translocated to the nucleus. Enhances CHUK-mediated NF-kappa-B activation involving NF- kappa-B p50-p65 and p50-c-Rel complexes. {ECO:0000269|PubMed:11389905, ECO:0000269|PubMed:12595760, ECO:0000269|PubMed:12753905, ECO:0000269|PubMed:12933576, ECO:0000269|PubMed:14653779, ECO:0000269|PubMed:15169888, ECO:0000269|PubMed:21784860}.