antimicrobial peptides classification α-helical peptides, β-sheet peptides, αβ-peptides - Antimicrobial peptidesfunction a class of alkaline, small molecules found widely in nature

Antimicrobial peptidessupplement The classification of antimicrobial peptides (AMPs) is a complex but crucial area of study, essential for understanding their diverse roles and potential applications.作者：CR Chung·2023·被引用次数：13—Antimicrobial peptides (AMPs)are natural compounds that exhibit antimicrobial propertiesand are potential candidates for drug development. These naturally occurring compounds, often described as small peptides with antimicrobial properties, are a fundamental part of the innate immune response across all life forms. While the nomenclature and classification systems for AMPs have not been fully standardized, several key approaches are widely used to categorize them, providing a framework for research and development.

Structural Classification of Antimicrobial Peptides

One of the most common methods for classifying antimicrobial peptides is based on their secondary structures. This approach recognizes the diverse three-dimensional arrangements that define their function and interaction with microbial membranes.2015年2月3日—Altogether the data produced in Peptides are a useful source of specifications allowingclassificationofantimicrobial peptidesand their ... The primary structural categories include:

* Alpha-helical peptides: These AMPs predominantly feature alpha-helical structuresClassification of antimicrobial peptides. AMPs are .... They are often amphipathic, meaning they have both hydrophobic and hydrophilic regions, which facilitates their interaction with and disruption of microbial cell membranesAntimicrobial peptides (AMPs), also called host defence peptides (HDPs)are part of the innate immune response found among all classes of life.. Examples include magainins and defensins.

* Beta-sheet peptides: Characterized by beta-sheet structures, these peptides often form beta-barrels or sheets that can aggregate to form pores in bacterial membranes. Bacteriocins, such as nisin, frequently fall into this category.

* Alpha-beta peptides: This group combines both alpha-helical and beta-sheet elements within their structure, offering unique modes of action.

* Extended structures/Loop structures: Some AMPs do not neatly fit into the alpha-helical or beta-sheet categories and possess more flexible or extended conformations.

Beyond these broad structural types, AMPs can also be characterized by their amino acid composition and overall molecular architecture, such as linear versus cyclic peptides, or those containing disulfide bonds.

Classification by Source and Target

Another significant way to classify antimicrobial peptides is by their origin or the range of microorganisms they target.

By Source:

Antimicrobial peptides are found across a vast spectrum of life. Their classification by source can highlight evolutionary relationships and unique properties. Some major sources include:

* Bacteria: Many bacteria produce AMPs, known as bacteriocins, which often act against closely related bacterial species. Examples include lantibiotics (Class I) and non-lantibiotics (Class II)作者：OO Ibrahim·2019·被引用次数：49—Bacteriocins are classified by different methods, including producing bacteria strains,peptideschemical structure, mechanism of..

* Archaea (Prokaryotes): While less studied than bacterial AMPs, archaea also possess antimicrobial peptide systemsMulti-label classification and features investigation of ....

* Protists: Single-celled eukaryotes like amoebas utilize AMPs as part of their defense mechanisms.

* Fungi: Fungal AMPs contribute to the defense of fungal organisms against bacterial and other microbial threats.

* Plants: Plant AMPs, such as thionins and defensins, play a vital role in plant immunity against pathogens.

* Animals: Vertebrates and invertebrates alike rely on AMPs as a critical component of their innate immune systems. Examples include insect antimicrobial peptides and human defensins.

By Target:

AMPs can also be categorized based on the types of microorganisms they are effective against:

* Antibacterial peptides: Primarily targeting bacteriaA generative artificial intelligence approach for the ....

* Antifungal peptides: Active against fungi.

* Antiparasitic peptides: Effective against protozoa and other parasites作者：OO Ibrahim·2019·被引用次数：49—Bacteriocins are classified by different methods, including producing bacteria strains,peptideschemical structure, mechanism of..

* Antiviral peptides: Capable of inhibiting viral replication or entry.

Some AMPs exhibit broader spectra of activity, targeting multiple types of microbes.Antimicrobial peptides: discovery, design and novel ...

Other Classification Criteria

While structure and source are primary, other criteria are also employed:

* Charge and Hydrophobicity: The net charge (often positive due to cationic amino acids) and the degree of hydrophobicity are crucial determinants of AMP activity, influencing their interaction with negatively charged microbial membranes.

* Mechanism of Action: Although not a direct classification, understanding how AMPs kill microbes (e.g., membrane permeabilization, intracellular targets) often informs their categorization.

* Life Kingdoms: Some systems classify AMPs based on the six life kingdoms (bacteria, archaea, protists, fungi, plants, and animals), offering a broad overview of their distributionClassification of Antimicrobial Peptides Bacteriocins, and ....

The ongoing research into antimicrobial peptides continues to refine these classification systems, aiming for a more standardized and comprehensive understanding of these vital molecules.作者：OO Ibrahim·2019·被引用次数：49—Bacteriocins are classified by different methods, including producing bacteria strains,peptideschemical structure, mechanism of. This detailed classification is instrumental for their potential application in combating infectious diseases and addressing the growing challenge of antimicrobial resistance.