MRPS11 Antibody

Target Protein Overview

MRPS11 (Mitochondrial Ribosomal Protein S11) is encoded by the nuclear MRPS11 gene and integrated into the 28S small subunit of mitochondrial ribosomes . Unlike prokaryotic ribosomes, mammalian mitochondrial ribosomes contain a higher protein-to-rRNA ratio (~75% protein), with MRPS11 binding to the 12S rRNA and participating in mRNA decoding . Its functions include:

• Structural stabilization of the mitochondrial ribosome

• Regulation of mitochondrial translation fidelity

• Potential role in apoptosis signaling pathways

Antibody Characteristics

Commercial MRPS11 antibodies demonstrate variability in epitope targeting and experimental performance:

Validation Data:

• ab185313 detects a ~21 kDa band in RT-4 cell lysates (WB)

• ABIN1538401 shows specificity for the central region of MRPS11

Cancer Biomarker Studies

MRPS11 overexpression correlates with poor prognosis in multiple malignancies:

In vitro studies demonstrate MRPS11 knockdown reduces mitochondrial protein synthesis by 60-75% , confirming its essential role in maintaining respiratory chain complexes.

Apoptosis Regulation

MRPS11 interacts with mitochondrial apoptosis-inducing factors:

• Modulates Bcl-2 family protein interactions

• Influences p53 stabilization under oxidative stress

• Associates with caspase activation pathways

Technical Considerations

Optimization Tips:

• Western Blot: Use 10% SDS-PAGE with 20-30 μg mitochondrial-enriched lysates

• IHC: Antigen retrieval with citrate buffer (pH 6.0) improves epitope exposure

• Blocking: 5% BSA in TBST reduces non-specific binding for polyclonal antibodies

Limitations:

• Cross-reactivity with bacterial S11 proteins reported at concentrations >2 μg/mL

• Nuclear staining artifacts observed in proliferating cells

Future Directions

Emerging applications include:

• Quantitative MRPS11 profiling in liquid biopsies for mitochondrial disorders

• Companion diagnostic development for MRPS11-targeted therapies

• High-resolution mapping of mitoribosome assembly defects