This article was accepted into the corpus but its outbound wikilinks were never NER-processed — typical at the deepest BFS hop or when the run's entity cap was reached. No expansion funnel to show.
| carboxypeptidase A | |
|---|---|
| Name | Carboxypeptidase A |
| EC number | 3.4.17.1 |
| CAS number | 9014-13-1 |
| Other names | pancreatic carboxypeptidase A, zinc carboxypeptidase A |
carboxypeptidase A Carboxypeptidase A is a zinc-dependent exopeptidase found in pancreatic secretions and extracellular fluids that removes C-terminal aromatic and aliphatic amino acids from polypeptides. It has been a model system in enzymology, structural biology, and enzyme mechanism studies by researchers from institutions such as University of Cambridge, Max Planck Society, Massachusetts Institute of Technology, and Columbia University. Its study intersects with work by scientists associated with Royal Society, National Academy of Sciences, Cold Spring Harbor Laboratory, and laboratories led by investigators influenced by Nobel laureates in chemistry and physiology.
Carboxypeptidase A was first characterized in pancreatic extracts and quickly became central to biochemical research at institutions including University of Oxford, Johns Hopkins University, Harvard University, University of California, Berkeley, and Rockefeller University. Early enzymologists compared it with peptidases studied at Pasteur Institute and Institut Curie, while subsequent structural studies involved collaborations with synchrotron facilities like European Synchrotron Radiation Facility and Stanford Synchrotron Radiation Lightsource. Grants and support from organizations such as Wellcome Trust, Howard Hughes Medical Institute, and National Institutes of Health propelled studies that linked enzymatic function to models developed at Max Planck Institute for Biophysical Chemistry and chemical principles taught at California Institute of Technology.
High-resolution crystal structures obtained by groups at University of Chicago, Imperial College London, and University of Vienna revealed a single polypeptide chain folded into a globular domain with an active site coordinating a catalytic zinc ion. The catalytic site architecture was elucidated using techniques practiced at European Molecular Biology Laboratory, Lawrence Berkeley National Laboratory, and Brookhaven National Laboratory, showing coordination of zinc by conserved residues and a hydrophobic pocket accommodating side chains. Mechanistic proposals built on concepts advanced by researchers affiliated with Max Planck Institute for Biochemistry, Scripps Research Institute, and ETH Zurich describe nucleophilic activation, transition-state stabilization, and proton shuttle networks analogous to mechanisms discussed in work from University of Cambridge and Columbia University.
Kinetic studies performed in laboratories at Yale University, University of Michigan, and Duke University determined Michaelis–Menten parameters for substrates containing C-terminal phenylalanine, tyrosine, tryptophan, leucine, and isoleucine. Substrate specificity mapping used synthetic peptides and chromatography methods developed at University of Toronto and University of Pennsylvania, while mass spectrometry analyses from groups at University of Washington and Max Delbrück Center refined understanding of cleavage patterns. Comparative studies with metallopeptidases characterized at Pasteur Institute and Karolinska Institutet highlighted preference for bulky hydrophobic residues and tolerance limits illuminated by mutagenesis efforts at University of Illinois and University of Southern California.
In vivo roles of the enzyme have been contextualized by physiological studies from centers including Mayo Clinic, Cleveland Clinic, and Memorial Sloan Kettering Cancer Center, linking proteolytic processing in digestion, peptide hormone maturation, and extracellular matrix remodeling. Comparative physiology projects at Smithsonian Institution, Natural History Museum, London, and Australian National University examined homologs across vertebrates and invertebrates, while clinical research at Stanford University School of Medicine and University College London Hospitals evaluated correlations with pancreatic disorders and protease imbalance syndromes studied at Mount Sinai Hospital.
Industrial proteomics and peptide synthesis workflows at companies and labs collaborating with Genentech, Pfizer, Novartis, and GlaxoSmithKline exploited carboxypeptidase A specificity for C-terminal processing in recombinant protein production. Biotechnological applications developed in partnership with Thermo Fisher Scientific and Agilent Technologies include analytical reagents and enzymatic assays. Medical research initiatives at Roche, Bayer, and academic spinouts from University of Cambridge explored diagnostic uses and therapeutic targeting strategies informed by translational programs funded by European Commission and Bill & Melinda Gates Foundation.
Inhibitor discovery benefited from medicinal chemistry programs at AstraZeneca, Boehringer Ingelheim, and academic groups at University of Oxford and University of Cambridge, yielding transition-state analogue inhibitors and small molecules that coordinate the catalytic zinc. Regulation by zymogen activation and endogenous protein inhibitors was characterized in studies associated with National Institute of Diabetes and Digestive and Kidney Diseases, Karolinska Institutet, and University of Freiburg, while protease inhibitor design employed structural insights from crystallography groups at MRC Laboratory of Molecular Biology and Institut Pasteur.
The enzyme’s discovery emerged from pancreatic extract studies in the early 20th century, with biochemical pioneers at University of Göttingen, University of Strasbourg, and University of Basel contributing to its initial characterization. Landmark structural and mechanistic papers originated from collaborations spanning Harvard Medical School, Princeton University, Yale School of Medicine, and European centers such as Institut Curie and Max Planck Institute, influencing generations of enzymologists and structural biologists connected to societies like American Society for Biochemistry and Molecular Biology and European Molecular Biology Organization.
Category:Proteases Category:Metalloproteases Category:Enzymes