315
CIDNP) originating from free radical reactions. This has been developed as a sensitive method to measure structural changes on the surface of proteins (Kaptein 1982;
Berliner 1989). Photo-chemically induced nuclear polarization (photo CIDNP)
requires a modified spectrometer and a proper light source (laser) to begin to probe
surface changes. This technique has the advantage of high sensitivity, and it yields
general conformation information (Monasterio 2014).
Conclusions
Enzymes are proteins responsible for catalysis of biochemical reactions. The classification information-rich EC number given by the Enzyme Commission as a simple identifier still persists. However robust approaches to quantitatively compare
catalytic reactions or to accurately predict enzyme mechanisms are just beginning
to appear. Further combining bond changes and reaction centers with structural
information about the substrates, products and mechanisms are needed to capture
the essence of enzyme chemistry in a functional classification.
X-ray Crystallography and NMR are most explored technique for structural
characterization of proteins and in particular enzymes. Recent technical advances in
crystallography, as well as better computational programs have made it much more
rapid in solving enzyme crystal structures. Modern NMR spectroscopy techniques
make extensive use of isotopically enriched proteins and should prove a powerful
approach for structural characterization of proteins in particular enzymes in the
future. Further technological advances are needed to establish NMR as the primary
tool for obtaining atomic structures of challenging systems with even higher complexity. The accumulating data on enzyme structures—and novel approaches, particularly genome projects and bioinformatics—are expected to increase our
understanding of enzyme function and mechanisms in the future.
References
Agarwal, P. K. (2006). Enzymes: An integrated view of structure, dynamics and function. Microbial
Cell Factories, 5, 2. https://doi.org/10.1186/1475- 2859- 5- 2
Ashburner, M., Ball, C. A., & Sherlock, G. (2000). The Gene Ontology Consortium. Gene ontology: tool for the unification of biology. Nature Genetics, 25, 25–29.
Audit, B., Levy, E. D., Gilks, W. R., Goldovsky, L., & Ouzounis, C. A. (2007). CORRIE: Enzyme
sequence annotation with confidence estimates. BMC Bioinformatics, 8(Suppl 4), S3.
Bachovchin, W. W. (2001). Contributions of NMR spectroscopy to the study of hydrogen bonds in
serine protease active sites. Magnetic Resonance in Chemistry, 39, 199–213.
Benkovic, S. J., & Hammes-Schiffer, S. (2003). A perspective on enzyme catalysis. Sci, 301(5637),
1196–1202.
Berliner, L. J. (1989). Laser chemically induced dynamic nuclear polarization studies in proteins:
α-lactalbumin. Archivos de Biología y Medicina Experimentales, 22, 123–128.
Proteins as Enzymes
CIDNP) originating from free radical reactions. This has been developed as a sensitive method to measure structural changes on the surface of proteins (Kaptein 1982;
Berliner 1989). Photo-chemically induced nuclear polarization (photo CIDNP)
requires a modified spectrometer and a proper light source (laser) to begin to probe
surface changes. This technique has the advantage of high sensitivity, and it yields
general conformation information (Monasterio 2014).
Conclusions
Enzymes are proteins responsible for catalysis of biochemical reactions. The classification information-rich EC number given by the Enzyme Commission as a simple identifier still persists. However robust approaches to quantitatively compare
catalytic reactions or to accurately predict enzyme mechanisms are just beginning
to appear. Further combining bond changes and reaction centers with structural
information about the substrates, products and mechanisms are needed to capture
the essence of enzyme chemistry in a functional classification.
X-ray Crystallography and NMR are most explored technique for structural
characterization of proteins and in particular enzymes. Recent technical advances in
crystallography, as well as better computational programs have made it much more
rapid in solving enzyme crystal structures. Modern NMR spectroscopy techniques
make extensive use of isotopically enriched proteins and should prove a powerful
approach for structural characterization of proteins in particular enzymes in the
future. Further technological advances are needed to establish NMR as the primary
tool for obtaining atomic structures of challenging systems with even higher complexity. The accumulating data on enzyme structures—and novel approaches, particularly genome projects and bioinformatics—are expected to increase our
understanding of enzyme function and mechanisms in the future.
References
Agarwal, P. K. (2006). Enzymes: An integrated view of structure, dynamics and function. Microbial
Cell Factories, 5, 2. https://doi.org/10.1186/1475- 2859- 5- 2
Ashburner, M., Ball, C. A., & Sherlock, G. (2000). The Gene Ontology Consortium. Gene ontology: tool for the unification of biology. Nature Genetics, 25, 25–29.
Audit, B., Levy, E. D., Gilks, W. R., Goldovsky, L., & Ouzounis, C. A. (2007). CORRIE: Enzyme
sequence annotation with confidence estimates. BMC Bioinformatics, 8(Suppl 4), S3.
Bachovchin, W. W. (2001). Contributions of NMR spectroscopy to the study of hydrogen bonds in
serine protease active sites. Magnetic Resonance in Chemistry, 39, 199–213.
Benkovic, S. J., & Hammes-Schiffer, S. (2003). A perspective on enzyme catalysis. Sci, 301(5637),
1196–1202.
Berliner, L. J. (1989). Laser chemically induced dynamic nuclear polarization studies in proteins:
α-lactalbumin. Archivos de Biología y Medicina Experimentales, 22, 123–128.
Proteins as Enzymes