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Monoclonal Antibody Ribosomal Large Subunit Biogenesis and Assembly

$260
100 µl
APPLICATIONS
REACTIVITY
Human, Monkey, Mouse, Rat

Application Methods: Western Blotting

Background: Ribosomal protein L11 (RPL11) is a nucleolar protein and component of the 60S ribosomal subunit. Research studies have shown that RPL11 plays a critical role in eukaryotic ribosome biogenesis (1). It has also been suggested that extraribosomal RPL11 functions in an RP-MDM2-p53 network in which RPL11 acts as a sensor of nucleolar stresses that perturb ribosome biogenesis (2). Indeed, RPL11 contributes to enhanced p53 stability and transcriptional activity in response to nucleolar stress and impaired ribosome biogenesis by binding and inhibiting the ubiquitin ligase activity of MDM2 (2-9). In addition to regulating p53 activity, research studies have also shown that RPL11 can inhibit cell cycle progression and ribosome biogenesis in response to nucleolar stress through repression of c-Myc transcriptional activity as well as its mRNA translation (10-12). Mutations in the RPL11 gene have been found in patients with Diamond-Blackfan anemia (13).

$260
100 µl
APPLICATIONS
REACTIVITY
Human, Monkey

Application Methods: Western Blotting

Background: Ribosomal protein L5 (RPL5) is one of several proteins that comprise the 60S ribosomal subunit. RPL5 binds 5S rRNA and the nucleolar RPL11 protein to form the 5S ribonucleoprotein particle (RNP) that is incorporated into the large 60S ribosomal subunit (1). An RP-MDM2-p53 protein complex that contains ribosomal proteins RPL5, RPL11, and RPL23 acts as a nucleolar stress sensor that binds and inhibits MDM2 ubiquitin ligase activity and enhances p53-mediated transcriptional activity (2,3). RPL5 cooperates with RPL11 to influence ribosome biogenesis through regulating expression of the transcription factor c-Myc, which acts as the master regulator of ribosome biogenesis (4). Mutations in the corresponding RPL5 gene are associated with Diamond-Blackfan anemia, which is a form of red blood cell aplasia, and some cases of pediatric T-cell acute lymphoblastic leukemia (5,6).

$122
20 µl
$293
100 µl
APPLICATIONS
REACTIVITY
Human, Monkey, Mouse, Rat

Application Methods: Immunofluorescence (Immunocytochemistry), Immunoprecipitation, Western Blotting

Background: Eukaryotic initiation factor 6 (eIF6) is reqiured for the 60S ribosomal subunit assembly in the nucleolus (1). In the cytoplasm, this protein is bound to 60S ribosome subunits and prevents them from joining 40S ribosome subunits to form 80S ribosomes (2). eIF6 is also shown to associate with the RNA-induced silencing complex (RISC) (3). Deletion of eIF6 abolishes the miRNA-mediated gene silencing (3). eIF6 may play its essential role in miRNA-mediated silencing by inhibiting translation initiation or ribosome recycling (3).

$260
100 µl
APPLICATIONS
REACTIVITY
Human, Monkey, Mouse, Rat

Application Methods: Western Blotting

Background: Ribosomal protein L26 (RPL26) is a component of the 60S ribosomal subunit and is involved in translation (1,2). It was shown that RPL26 increases the translation of p53 mRNA by binding to its 5' untranslated region (UTR) after DNA damage. Studies found that overexpression of RPL26 enhances the binding of p53 mRNA to the ribosomes and increases p53 translation. Overexpression of RPL26 also induces cell-cycle arrest at G1 phase and increases radiation-stimulated apoptosis (2).

$293
100 µl
APPLICATIONS
REACTIVITY
Human, Monkey, Mouse, Rat

Application Methods: Immunofluorescence (Immunocytochemistry), Immunohistochemistry (Paraffin), Immunoprecipitation, Western Blotting

Background: A subset of mitochondrial proteins are synthesized on the ribosomes within mitochondria (1). The 55S mammalian mitochondrial ribosomes are composed of a 28S small subunit and a 39S large subunit (1). Over 40 protein components have been identified from the large subunit of the human mitochondrial ribosome (1). The mitochondrial ribosomal protein L11 (MRPL11) is one such component (1). In animals, plants and fungi, this protein is translated from a gene in the nuclear genome (2).