Thr-Pro is a dipeptide that couples polar threonine with conformationally restrictive proline, favoring turn-like structures. Hydroxyl functionality enables hydrogen bonding, while proline shapes backbone curvature. Researchers use it to study β-turn formation and local secondary-structure preferences. Applications include motif design, folding simulations, and enzyme-substrate recognition work.
CAT No: R2393
CAS No:46398-79-2
Synonyms/Alias:H-THR-PRO-OH;Thr-Pro;46398-79-2;L-Thr-L-Pro;L-threonyl-L-proline;threonylproline;threonyl-proline;CHEBI:73662;(2S)-1-[(2S,3R)-2-AMINO-3-HYDROXYBUTANOYL]PYRROLIDINE-2-CARBOXYLIC ACID;CHEMBL3321984;(S)-1-((2S,3R)-2-Amino-3-hydroxybutanoyl)pyrrolidine-2-carboxylic acid;Threoninylproline;TP dipeptide;T-P Dipeptide;L-Threoninyl-L-Proline;Threonine Proline dipeptide;Threonine-Proline dipeptide;SCHEMBL24419900;DTXSID40431470;HY-P4630;BDBM50049714;DA-54122;CS-0655426;Q27143833;T-P;
Thr-Pro, also known as Threonylproline, is a dipeptide composed of the amino acids threonine and proline linked via a peptide bond. As a member of the dipeptide family, it exhibits unique biochemical properties that make it valuable for a range of research and technical applications. The presence of both a polar, hydroxyl-containing threonine residue and a structurally distinctive proline moiety imparts specific conformational and functional features to the molecule. Its relevance spans peptide chemistry, enzymology, and studies of protein structure and function, making it a versatile tool in the modern biochemical laboratory.
Peptide synthesis research: Thr-Pro is widely utilized in the development and optimization of synthetic peptide methodologies. Its inclusion in model peptide sequences allows researchers to study the impact of secondary structure disruptions caused by the proline residue, as well as the hydrogen-bonding potential introduced by threonine. The dipeptide serves as a reference standard for evaluating coupling efficiency, protecting group strategies, and cleavage conditions in solid-phase and solution-phase peptide synthesis protocols.
Protease substrate studies: In enzymology, this dipeptide is frequently employed as a substrate or model compound to investigate the specificity and catalytic mechanisms of proteases and peptidases. The unique conformational constraints imposed by proline, combined with the side-chain functionality of threonine, can significantly influence enzyme recognition and cleavage patterns. Researchers use it to probe the substrate preferences of enzymes such as prolyl oligopeptidase, dipeptidyl peptidase, and other serine proteases, thereby advancing understanding of proteolytic processing in biological systems.
Structural biology and protein folding: The Thr-Pro sequence is notable for its role in modulating local peptide backbone conformation, particularly due to the rigid cyclic structure of proline. Studies incorporating this dipeptide into longer peptides or model systems help elucidate the effects of specific dipeptide motifs on β-turn formation, helix capping, and overall protein folding dynamics. Insights gained from such work contribute to the rational design of peptides with tailored secondary structures and enhanced stability.
Analytical method development: The dipeptide is frequently used as a standard or calibration compound in the development and validation of analytical techniques such as high-performance liquid chromatography (HPLC), capillary electrophoresis, and mass spectrometry. Its defined structure and physicochemical properties make it ideal for optimizing separation parameters, retention time prediction, and quantitative analysis of peptide mixtures. This facilitates accurate detection and characterization of peptides in complex biological or synthetic samples.
Peptide-based biomaterials research: Researchers investigating the design of novel biomaterials and functionalized surfaces often incorporate dipeptides like Thr-Pro to modulate material properties or confer specific biological activities. The sequence's influence on hydrophilicity, conformational rigidity, and molecular recognition makes it a useful building block in the engineering of peptide-based hydrogels, coatings, and scaffolds. Such studies support the development of advanced materials for applications in biosensing, tissue engineering, and surface chemistry.
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