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You may include any references to papers as in: the use of JSmol in Proteopedia [1] or to the article describing Jmol [2] to the rescue.Text To Be Displayed
Function of your protein
The specific function of ornithine aminotransferase is responsible for converting ornithine into pyrroline-5-carboxylate (P5C) to another molecule. Glutamate and proline are the amino acids that can be produced from P5C
Homo sapiens is the organism from which the HOAT is derived
These enzymes are comprised of substrates - L-Orn, GABA and AVA. By using the soaking method, the GABA structure was covalently attached to the PLP, as well as the AVA structure. Both structures were covalently attached to both the PLP and Catalytic Lys292.
Biological relevance and broader implications
A type of cancer that is being studied is hepatocellular carcinoma, an aggressive form of liver cancer. Scientists have determined that HOAT is over-expressed in specific cells.
The study of the HOAT enzyme has enabled scientists to gain a more thorough understanding of metabolism. This is because it provides information about how the human body responds to specific stimuli through the use of this enzyme.
Important amino acids
Amino acids 300-304 are an important parts of the ligands binding site [3].
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Hydrogen bonding - Val 143, Asp 263, Gly 142
Covalent bonding - Lys 292
Salt bridge - Asp 263 and Arg
Pi-stacking - Phe 177
Structural highlights
This is a sample scene created with SAT to color by Group, and another to make a transparent representation of the protein. You can make your own scenes on SAT starting from scratch or loading and editing one of these sample scenes.
Important main secondary features to stabilize the protein
Each C=O consists of two oxygen atoms that form hydrogen bonds, which stabilize the secondary structure. A polar amino acid residue is on the outside and a nonpolar amino acid is inside the alpha helix since non-polar amino acids do not react with water. Beta sheet runs in an antiparallel direction of non-polar and polar amino acids.
Homodimer is quaternary structure and HOAT cotains homodimer.
Space fill represent of how much of molecules have occupied at the active site.
Other important features
Aromatic rings plays a role important role in protein structure and ligand binding. Aromatic ring is important of protein interaction that allows pi stacking and acts as acceptor for hydrogen bonds. It is important for protein structure and ligand binding.
Polar amino acids is important part of protein structure. It is found usually on the outside of the alpha and beta that is because of its water-loving quality. It help to determine the 3-D structure and its specifically function.
- ↑ Hanson, R. M., Prilusky, J., Renjian, Z., Nakane, T. and Sussman, J. L. (2013), JSmol and the Next-Generation Web-Based Representation of 3D Molecular Structure as Applied to Proteopedia. Isr. J. Chem., 53:207-216. doi:https://dx.doi.org/10.1002/ijch.201300024
- ↑ Herraez A. Biomolecules in the computer: Jmol to the rescue. Biochem Mol Biol Educ. 2006 Jul;34(4):255-61. doi: 10.1002/bmb.2006.494034042644. PMID:21638687 doi:10.1002/bmb.2006.494034042644
- ↑ Butrin A, Butrin A, Wawrzak Z, Moran G, Liu D. Determination of the pH-Dependence, Substrate Specificity and Turnovers of Alternative Substrates for Human Ornithine Aminotransferase. J Biol Chem. 2022 Apr 20:101969. doi: 10.1016/j.jbc.2022.101969. PMID:35460691 doi:https://dx.doi.org/10.1016/j.jbc.2022.101969