A New Tool for Separating Opioid Peptide Processing Intermediates
Apocarboxypeptidase B-Sepharose selectively captures opioid peptides with basic amino acid tails, providing a new chromatographic tool for studying peptide processing.
Quick Facts
What This Study Found
Apocarboxypeptidase B-Sepharose selectively adsorbs opioid peptides with C-terminal basic residues, providing a novel separation tool for peptide processing research.
Key Numbers
How They Did This
Carboxypeptidase B was immobilized on Sepharose and inactivated with o-phenanthroline. Opioid peptide binding was tested at various pH values and peptides were eluted at pH 4.0.
Why This Research Matters
This tool allows researchers to separate opioid peptide processing intermediates from final products, helping track how the body converts precursor proteins into active peptides.
The Bigger Picture
Understanding how the body processes opioid peptide precursors is important for drug development. This tool enables researchers to track the intermediate steps, potentially identifying new therapeutic targets in the processing pathway.
What This Study Doesn't Tell Us
Technical methodology paper. The column's utility for complex biological samples was not fully demonstrated. Only a few peptides were tested.
Questions This Raises
- ?Can this method be applied to complex biological samples like brain tissue?
- ?Could blocking specific processing steps alter the balance of active opioid peptides?
Trust & Context
- Key Stat:
- Selective capture of processing intermediates Column specifically adsorbs peptides with C-terminal basic residues — markers of incomplete processing
- Evidence Grade:
- Preliminary methodology paper demonstrating proof of concept with limited peptide testing.
- Study Age:
- Published in 1990. A technical contribution to peptide research methodology.
- Original Title:
- Apocarboxypeptidase B-sepharose: a specific adsorbent for peptides.
- Published In:
- Biochemical and biophysical research communications, 166(1), 330-5 (1990)
- Authors:
- Yasuhara, T, Ohashi, A
- Database ID:
- RPEP-00179
Evidence Hierarchy
Frequently Asked Questions
What are processing intermediates?
When the body makes opioid peptides, it first produces a large precursor protein that gets cut into smaller pieces. Processing intermediates are the partially-cut forms that still have extra amino acids attached before final trimming.
Why is this tool useful?
By selectively capturing unfinished peptides, researchers can study how quickly and completely the body processes opioid precursors — important for understanding diseases where this processing is altered.
Read More on RethinkPeptides
Cite This Study
https://rethinkpeptides.com/research/RPEP-00179APA
Yasuhara, T; Ohashi, A. (1990). Apocarboxypeptidase B-sepharose: a specific adsorbent for peptides.. Biochemical and biophysical research communications, 166(1), 330-5.
MLA
Yasuhara, T, et al. "Apocarboxypeptidase B-sepharose: a specific adsorbent for peptides.." Biochemical and biophysical research communications, 1990.
RethinkPeptides
RethinkPeptides Research Database. "Apocarboxypeptidase B-sepharose: a specific adsorbent for pe..." RPEP-00179. Retrieved from https://rethinkpeptides.com/research/yasuhara-1990-apocarboxypeptidase-bsepharose-a-specific
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.