Members of this entry are found mostly in g-proteobacteria, especially in Vibrio. Strangely enough, there seems to be one eukaryotic homolog in Nematostella vectensis (NEMVEDRAFT_v1g226006), where the PA0388-like domain is fused with a domain homogous to the Methionine biosynthesis protein MetW (see below). In several Pseudomonas species, but also in Vibrio vulnificus and Azotobacter vinelandii PA0388 homologs are genomic neighbors of Nucleoside 5-triphosphatase RdgB (dHAPTP, dITP, XTP-specific) (EC 3.6.1.15) and Methionine biosynthesis protein MetW. On the other hand, in most Vibrio species it appears as a part of a conserved operon involved in possible response to stress.
","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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