Description
Product Characteristics:
The ubiquitin (Ub) pathway involves three sequential enzymatic steps that facilitate the conjugation of Ub and Ub-like molecules to specific protein substrates. The first step requires the ATP-dependent activation of the Ub C-terminus and the assembly of multi-Ub chains by the Ub-activating enzyme known as the E1 component. The Ub chain is then conjugated to the Ub-conjugating enzyme (E2) to generate an intermediate Ub-E2 complex. The Ub-ligase (E3) then catalyzes the transfer of Ub from E2 to the appropriate protein substrate. A wide range of enzymes facilitate in the proteolytic Ub pathway, including monoclonal nonspecific suppressor factor-beta (MNSF-beta), a subunit of MNSF, which is a lymphokine product of a murine T cell hybrid-oma that restricts the production of LPS-induced immunoglobulin secreting cells in an antigen-nonspecific manner. MNSF-beta is a ubiquitin-like fusion protein consisting of the ribosomal protein S30 and a protein that shares 36 % sequence identity with ubiquitin. This ubiquitin-like segment (Ubi-L) can be cleaved from MNSF-beta in the cytosol.
Subcellular location: Cytoplasm, Nucleus
Synonyms: 40S ribosomal protein S30, asr1, FAU, FAU encoded ubiquitin like protein, FAU1, FBR MuSV associated ubiquitously expressed, Finkel Biskis Reilly murine sarcoma virus FBR MuSV ubiquitously expressed fox derived, Finkel Biskis Reilly murine sarcoma virus FBR MuSV ubiquitously expressed, Finkel Biskis Reilly murine sarcoma virus ubiquitously expressed, FLJ22986, Fub1, Fubi, MNSFbeta, Monoclonal nonspecic suppressor factor beta, Ribosomal protein S30, RPS30, S30, UBIM_HUMAN, Ubiquitin like protein fubi and ribosomal protein S30, Ubiquitin like protein fubi, Ubiquitin like S30 fusion protein, Ubiquitin-like protein FUBI.
Target Information: This gene is the cellular homolog of the fox sequence in the Finkel-Biskis-Reilly murine sarcoma virus (FBR-MuSV). It encodes a fusion protein consisting of the ubiquitin-like protein fubi at the N terminus and ribosomal protein S30 at the C terminus. It has been proposed that the fusion protein is post-translationally processed to generate free fubi and free ribosomal protein S30. Fubi is a member of the ubiquitin family, and ribosomal protein S30 belongs to the S30E family of ribosomal proteins. Whereas the function of fubi is currently unknown, ribosomal protein S30 is a component of the 40S subunit of the cytoplasmic ribosome. Pseudogenes derived from this gene are present in the genome. Similar to ribosomal protein S30, ribosomal proteins S27a and L40 are synthesized as fusion proteins with ubiquitin. [provided by RefSeq, Jul 2008]