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Binding sites for a signalling phosphoprotein may be diverse in their chemical structure. [9] Phosphorylation of the hydroxyl group can change the activity of the target protein, or may form part of a signaling cascade via SH2 domain binding. [10] A tyrosine residue also plays an important role in photosynthesis.
Tyrosine hydroxylase or tyrosine 3-monooxygenase is the enzyme responsible for catalyzing the conversion of the amino acid L-tyrosine to L-3,4-dihydroxyphenylalanine (L-DOPA). [ 5 ] [ 6 ] It does so using molecular oxygen (O 2 ), as well as iron (Fe 2+ ) and tetrahydrobiopterin as cofactors .
Tyrosine phosphorylation is the addition of a phosphate (PO 4 3−) group to the amino acid tyrosine on a protein. It is one of the main types of protein phosphorylation. This transfer is made possible through enzymes called tyrosine kinases. Tyrosine phosphorylation is a key step in signal transduction and the regulation of enzymatic activity.
Phosphorylation introduces a charged and hydrophilic group in the side chain of amino acids, possibly changing a protein's structure by altering interactions with nearby amino acids. Some proteins such as p53 contain multiple phosphorylation sites, facilitating complex, multi-level regulation. Because of the ease with which proteins can be ...
Phenylalanine hydroxylase (PAH) (EC 1.14.16.1) is an enzyme that catalyzes the hydroxylation of the aromatic side-chain of phenylalanine to generate tyrosine.PAH is one of three members of the biopterin-dependent aromatic amino acid hydroxylases, a class of monooxygenase that uses tetrahydrobiopterin (BH 4, a pteridine cofactor) and a non-heme iron for catalysis.
Crystallographic structure of a Streptomyces-derived tyrosinase in complex with a so-called "caddie protein". [8] In all models, only the tyrosinase molecule is shown, copper atoms are shown in green and the molecular surface is shown in red. In models D and E, histidine amino acids are shown as a blue line representation.
Bruton's+tyrosine+kinase at the U.S. National Library of Medicine Medical Subject Headings (MeSH) Human BTK genome location and BTK gene details page in the UCSC Genome Browser. Overview of all the structural information available in the PDB for UniProt: Q06187 (Tyrosine-protein kinase BTK) at the PDBe-KB
Rem2 signaling affects neuronal structure and function in part by regulation of gene expression. Molecular and Cellular NeuroscienceStudies of the similar gene in mice suggested that this PTP may be involved in cell-cell interaction, primary axonogenesis, and axon guidance during embryogenesis. This PTP has been also implicated in the molecular ...
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