This presumed domain has no known function. It is found in one or two copies in several Caenorhabditis elegans proteins. It is roughly 130 amino acids long. The domain contains 12 conserved cysteines which suggests that the domain is an extracellular domain and that these cysteines form six intradomain disulphide bridges. The GO annotation for this protein indicates that it has a function in nematode larval development and has a positive regulation of growth rate.
","llm":false,"checked":false,"updated":false}],"wikipedia":[{"title":"Domain_of_unknown_function","extract":"A domain of unknown function (DUF) is a protein domain that has no characterised function. These families have been collected together in the Pfam database using the prefix DUF followed by a number, with examples being DUF2992 and DUF1220. As of 2019, there are almost 4,000 DUF families within the Pfam database representing over 22% of known families. Some DUFs are not named using the nomenclature due to popular usage but are nevertheless DUFs.
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