Related Experiment Video
Updated: Jun 12, 2025
09:02
Characterization of Intra-Cartilage Transport Properties of Cationic Peptide Carriers
Published on: August 10, 2020
7.5K
Simple acyclic dipeptides with aromatic units as anion carriers.
Umatai A Hale1, Anil K Yadav1, Nandita Madhavan1
1Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400076, India. nanditam@chem.iitb.ac.in.
Chemical Communications (Cambridge, England)
|June 11, 2025
Summary
Acyclic dipeptides with aromatic groups efficiently transport anions across cell membranes. These simple peptide transporters are valuable for both therapeutic applications and studying natural protein functions.
Area of Science:
- Biochemistry
- Membrane Transport
- Supramolecular Chemistry
Background:
- Simple peptide-derived anion transporters are needed for therapeutic uses and as models for natural protein systems.
- Understanding anion transport mechanisms is crucial for various biological and medical applications.
Purpose of the Study:
- To investigate the anion transport capabilities of acyclic dipeptides rich in aromatic units.
- To explore the potential of these peptides as therapeutic agents and model systems.
Main Methods:
- Synthesis of acyclic dipeptides incorporating aromatic moieties.
- Lipid bilayer reconstitution assays to measure anion transport.
- Spectroscopic techniques to analyze peptide-membrane interactions and anion binding.
Main Results:
- Acyclic dipeptides rich in aromatic units were found to transport anions across lipid bilayers.
- The NH groups of the dipeptides were identified as key sites for anion binding.
- Hydrophobic side chains facilitate the insertion of the dipeptides into the lipid membrane.
Conclusions:
- Acyclic dipeptides serve as effective synthetic anion transporters.
- These peptides offer a simplified platform for studying anion transport mechanisms.
- The design principles demonstrated can be applied to develop novel therapeutic agents.
Related Concept Videos
01:18Aromatic Hydrocarbon Anions: Structural Overview
2.7K
Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
Due to the absence of continuous...
Due to the absence of continuous...
2.7K
01:19Amines to Amides: Acylation of Amines
2.4K
Various carboxylic acid derivatives (such as acid chlorides, esters, and anhydrides) can be used for the acylation of amines to yield amides. The reaction requires two equivalents of amines. The first amine molecule functions as a nucleophile and attacks the carbonyl carbon to produce a tetrahedral intermediate. This is followed by the loss of the leaving group and restoration of the C=O bond.
Next, the second equivalent of amine serves as a Brønsted base and deprotonates the quaternary...
Next, the second equivalent of amine serves as a Brønsted base and deprotonates the quaternary...
2.4K
01:20Anionic Chain-Growth Polymerization: Overview
2.1K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
2.1K
01:18Aromatic Hydrocarbon Cations: Structural Overview
2.8K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
Removing one hydrogen from the intervening CH2 group...
2.8K
01:28Structures of Carboxylic Acid Derivatives
2.4K
Structure of Carboxylic Acid Derivatives
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the...
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the...
2.4K
01:17Pore Transport and Ion-Pair Transport
389
Pore transport and ion-pair formation are critical mechanisms for the absorption and distribution of drugs in the body.
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
Pore transport, also known as convective transport, is a process where small molecules like urea, water, and sugars rapidly cross cell membranes as though there were channels or pores in the membrane. Although direct microscopic evidence is limited but the concept of pores or channels is widely accepted based on physiological evidence. Despite the lack of direct...
389