RT Journal A1 Arifuzzaman, Mohammad A1 Maeda, Maki A1 Itoh, Aya A1 Nishikata, Kensaku A1 Takita, Chiharu A1 Saito, Rintaro A1 Ara, Takeshi A1 Nakahigashi, Kenji A1 Huang, Hsuan-Cheng A1 Hirai, Aki A1 Tsuzuki, Kohei A1 Nakamura, Seira A1 Altaf-Ul-Amin, Mohammad A1 Oshima, Taku A1 Baba, Tomoya A1 Yamamoto, Natsuko A1 Kawamura, Tomoyo A1 Ioka-Nakamichi, Tomoko A1 Kitagawa, Masanari A1 Tomita, Masaru A1 Kanaya, Shigehiko A1 Wada, Chieko A1 Mori, Hirotada T1 Large-scale identification of protein–protein interaction of Escherichia coli K-12 JF Genome Research JO Genome Research YR 2006 FD May 01 VO 16 IS 5 SP 686 OP 691 DO 10.1101/gr.4527806 UL http://genome.cshlp.org/content/16/5/686.abstract AB Protein–protein interactions play key roles in protein function and the structural organization of a cell. A thorough description of these interactions should facilitate elucidation of cellular activities, targeted-drug design, and whole cell engineering. A large-scale comprehensive pull-down assay was performed using a His-tagged Escherichia coli ORF clone library. Of 4339 bait proteins tested, partners were found for 2667, including 779 of unknown function. Proteins copurifying with hexahistidine-tagged baits on a Ni2+-NTA column were identified by MALDI-TOF MS (matrix-assisted laser desorption ionization time of flight mass spectrometry). An extended analysis of these interacting networks by bioinformatics and experimentation should provide new insights and novel strategies for E. coli systems biology.