Table 1 The number of unique p-sites and phosphoproteins identified in the various phosphorylation compendiums and subsets
Total p-SitesTotal p-Sites Found in PFAM DomainsHighly Confident p-SitesHighly Confident p-Sites Found in PFAM DomainsPhosphoproteinsPhosphoproteins with Highly Confident p-Sites
12UHQ978320592566 (26%)43123741112 (47%)
20UHQ (only HTP)13,24426254156 (31%)69825871421 (55%)
21UHQ (including PG2)14,33930365519 (38%)117526331557 (59%)
21UHQ metabolism (including PG2)166852749999412197
21UHQ metabolism essential proteins (including PG2)33915379347136
  • p-sites identified in three or more experiments are designated as Highly Confident. 12UHQ refers to the Amoutzias et al. (2012) dataset. 20UHQ (only HTP) refers to the p-sites identified by 20 HTP experiments in Vlastaridis et al. (2017). 21UHQ (including PG2) refers to the p-sites identified by 20 HTP experiments and by PhosphoGrid2 in Vlastaridis et al. (2017). 21UHQ metabolism (including PG2) refers to the p-sites identified by 20 HTP experiments and by PhosphoGrid2 in Vlastaridis et al. (2017) that were in metabolic proteins. 21UHQ metabolism essential proteins (including PG2) refers to p-sites identified by 20 HTP experiments and by PhosphoGrid2 in Vlastaridis et al. (2017) that were in essential metabolic proteins. p-site, phosphorylation site; HTP, high-throughput.