Definition
noun
(1) An autonomously folding functional unit of a protein.
(2) A part of protein that can fold, function and exist independently of the rest of the protein chain or structure.
Supplement
Protein domains vary in length. Some can consist of about 25 amino acids while others up to 500 amino acids in length. Zinc fingers are an example of small protein domains that can coordinate one or more zinc ions to help stabilize their folds.
Genes are expressed through the process of protein synthesis. This elaborate tutorial provides an in-depth review of the different steps of the biological production of protein starting from the gene up to the process of secretion. Also included are topics on DNA replication during interphase of the cell cycle, DNA mutation and repair mechanisms, gene pool, modification, and diseases...
Proteins have a crucial role in various biological activities. Get to know how proteins are able to perform as enzymes, cofactors, or regulators. In this tutorial, you will also know the common metabolic pathways of biomolecules, such as glucose and other carbohydrates, fats, proteins and amino acids, and essential nutrients...
This tutorial looks at the mutation at the gene level and the harm it may bring. Learn about single nucleotide polymorphisms, temperature-sensitive mutations, indels, trinucleotide repeat expansions, and gene duplication...
This tutorial is about genetic regulation in eukaryotes. Learn about the general structure of a eukaryotic gene, the transcription factors and post-transcriptional regulation...
Part of the genetic information is devoted to the synthesis of proteins. mRNA, a type of RNA, is produced as a transcript that carries the code for protein synthesis. Read this tutorial for further details...
The endoplasmic reticulum and Golgi apparatus are the organelles involved in the translation step of protein synthesis and the ensuing post-translational steps. Read this tutorial for more info...