Fig. 2

Label-free LC–MS/MS analysis of R. papyrosolvens secretomes. a Venn diagram of total protein numbers for R. papyrosolvens secretomes in glucose, cellobiose, cellulose, and corn stover media. b Functional profile of proteins identified in secretomes. Percentages of such proteins in each COG term were shown in columns (X, mobilome: prophages, transposons; G, carbohydrate transport and metabolism; R, general function prediction only; D, cell cycle control, cell division, chromosome partitioning; F, nucleotide transport and metabolism; K, transcription; U, intracellular trafficking, secretion, and vesicular transport; M, cell wall/membrane/envelope biogenesis; S, function unknown; E, amino acid transport and metabolism; O, posttranslational modification, protein turnover, chaperones; C, energy production and conversion; I, lipid transport and metabolism; J, translation, ribosomal structure and biogenesis; V, defense mechanisms; Q, secondary metabolites biosynthesis, transport and catabolism; P, inorganic ion transport and metabolism; L, replication, recombination and repair; T, signal transduction mechanisms). Proteins identified were enriched in G, X and R of COG categories (*P < 0.05, **P < 0.01, hypergeometric test). c Box plot of differential expression of COG category of G in four secretomes under four carbon sources (*P < 0.05, **P < 0.01, t-test)