What does proteome mean?
A proteome is the full collection of proteins present in a cell, tissue, organism, or other biological system at a particular time and under particular conditions. Unlike a genome, which describes the genetic information a biological system carries, a proteome reflects the proteins that are actually present, often including their abundance, chemical modifications, and interactions. Scientists study proteomes to investigate how biological systems function, how diseases change cellular activity, and which proteins may serve as drug targets or diagnostic markers. The term is especially associated with large-scale protein analysis, including techniques such as mass spectrometry. It is conceptually parallel to genome, transcriptome, and metabolome, but each term refers to a different class of biological molecules. Proteome is most often encountered in formal scientific and medical writing rather than everyday speech.
nounThe complete set of proteins produced by a cell, organism, tissue, or other biological system at a given time or under specified conditions. It includes the proteins present, their relative abundance, and often their forms, modifications, and interactions.
- The complete set of proteins produced by a cell, organism, tissue, or other biological system at a given time or under specified conditions.
"Researchers used mass spectrometry to compare the proteome of healthy and cancerous cells."
"The research team characterized the yeast proteome and identified proteins involved in stress responses."
"Comparing the proteomes of healthy and diseased tissue revealed several altered protein pathways."
The plural is used when referring to the protein complements of different cells, tissues, organisms, or conditions.
"The researchers compared the proteomes of untreated and treated tumor cells."
The genome is the instruction manual; the proteome is the workforce currently doing the work—though it also reveals how cells regulate those instructions.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of proteome
The term emerged in the 1990s as biologists needed a name for the complete protein complement of a cell or organism. It combines the protein stem with the scientific suffix -ome, used for a body or complete collection of components. Its development was influenced by the parallel term genome, although the two words do not share the same lexical root.
Related word forms
How proteome is actually used
Proteome is a technical term used primarily in biology, biochemistry, and medicine. It is usually written as one word and is often used in research contexts such as proteome analysis and proteome profiling.
Easily confused with proteome
A genome is the complete set of genetic material in an organism or cell, whereas a proteome is the complete set of proteins being expressed at a particular time.
Proteome is the noun naming the proteins present in a biological system; proteomics is the field of study that analyzes those proteins and their functions.