Proteomics

Proteomics

The large-scale study of proteins, including their structures, functions, and interactions.

Proteome

The entire set of proteins expressed by a cell, tissue, or organism.

Post-translational modifications (PTMs)

Chemical modifications that occur after protein synthesis, including phosphorylation and glycosylation.

Mass Spectrometry (MS)

An analytical technique used to measure the mass-to-charge ratio of ions, often used for protein identification.

Electrospray Ionisation (ESI)

A process used in mass spectrometry to produce ions from a sample solution by applying a high voltage.

Matrix-assisted laser desorption/ionization (MALDI)

A technique in mass spectrometry that uses a laser to ionize proteins embedded in a matrix.

Amino acid sequencing

The process of determining the sequence of amino acids in a protein.

SDS-PAGE

A method for separating proteins based on their size using sodium dodecyl sulfate polyacrylamide gel electrophoresis.

Immunoaffinity techniques

Methods that use antibodies to isolate and purify specific proteins from complex mixtures.

Alternative splicing

A process by which different combinations of exons are joined together to produce different mRNA transcripts from the same gene.

RNA editing

The process of modifying RNA molecules by changing nucleotides, such as converting cytidine to uracil.

Protein-protein interactions

Interactions between proteins that can influence biological processes and signaling pathways.

Tandem affinity purification (TAP)

A method to purify protein complexes using specific tags that bind to affinity resins.

Whole proteome analysis

The study of all proteins expressed in a cell or system under various conditions.

Gel electrophoresis

A technique used to separate proteins based on size and charge.

Signal transduction pathways

Series of molecular events and interactions that lead to a cellular response following a signal.

Protein modifications

Chemical changes made to proteins that can affect their function and activity.

Quantitative proteomics

The measurement of protein abundance and changes in protein levels under varying conditions.

Isobaric tagging

Techniques used for labeling and quantifying proteins in mass spectrometry, such as iTRAQ.

Bioinformatics

The use of computational tools to analyze biological data, including protein sequences.

Peptide fragmentation

The process in mass spectrometry where peptides are broken into smaller fragments for analysis.

Non-redundant database

A database where each entry is unique and not duplicated.

Tumor proteomics

The study of the proteome of tumors to identify biomarkers and therapeutic targets.

Gene expression profiling

Analysis of the expression patterns of genes to understand their function and regulation.

Two-dimensional gel electrophoresis

A technique that separates proteins based on their isoelectric point and molecular weight.

Natural isotopes

Atoms of the same element that have different numbers of neutrons and thus different mass.

Trypsin

A proteolytic enzyme used to cleave proteins at the carboxyl side of lysine and arginine residues.

Ion optics

Devices within mass spectrometers that focus and direct ion beams.

Fragment ions

Ions that are produced during the fragmentation of a parent ion in mass spectrometry.

Data mining

The process of analyzing data to discover patterns and relationships.

Functional proteomics

The study of the functions and interactions of proteins within biological systems.

Affinity chromatography

A technique used to purify proteins based on their specific interactions with ligands.

Statistical rigor

The strict application of statistical methods to ensure the validity and reliability of research results.

Protein sequence databases

Online resources that store information about sequenced proteins, including variants and modifications.

Lipidation

The post-translational modification of proteins through the addition of lipid groups.

Protein complexes

Groups of proteins that interact with each other to form functional structures.

Transcriptional regulation

The mechanisms that control the rate at which genes are transcribed into RNA.

Cellular systems mapping

The process of identifying and diagramming the interactions and functions of proteins within a cell.

Rapid diagnostics

Quick methods for identifying diseases or conditions using biomolecular techniques.

Drug effects

The changes in biological processes caused by pharmaceutical compounds.

Disease biomarkers

Biological indicators that signify the presence or state of a disease.