Updated project metadata. This project provides tandem mass spectrometry datasets of an artificial microbiota composed of 24 microbial strains: Bacillus cereus ATCC 14579, Bacillus subtilis ATCC 6633, Bacillus thuringiensis DSM 5815, Bordetella parapertussis Bpp5, Cellulophaga lytica DSM 7489, Deinococcus deserti VCD115, Deinococcus geothermalis DSM 11300, Deinococcus proteolyticus DSM 20540, Kineococcus radiotolerans SRS30216, Marivirga tractuosa DSM 4126, Oceanibulbus indolifex HEL-45, Oceanicola granulosus HTCC2516, Phaeobacter inhibens DSM 17395, Pseudomonas putida mt-2 KT2440, Pseudopedobacter saltans DSM 12145, Roseobacter denitrificans OCh 114, Roseovarius nubinhibens ISM, Ruegeria pomeroyi DSS-3, Sagittula stellata E 37, Salmonella bongori NCTC 12419, Shigella flexneri 2a 2457T, Sphingomonas wittichii RW1, Staphylococcus carnosus TM300, Vibrio harveyi ATCC 14126