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Summary

This notebook shows how the master gene table is generated. Essentially, genes from hg38 human genome annotation are retrieved and the region around their TSS is scored for H3K4m3, H3K27m3 and H2AUb. DeSeq2 is applied in a Minute-ChIP specific manner and genes are annotated as differential across conditions: Primed vs Naïve, EZH2i treated Naïve vs Naïve and EZH2i treated Primed vs Primed. Final table includes these values, fold change differences and statistical significance scores for all genes.

Additionally, expression values are also used to do a DeSeq2 analysis and such scores are incorporated to the table.

The annotation file used is the one coming from Annotations/Genes/refFlat.txt.

Additionally, since all isoforms available are annotated, one is selected per gene to do the TSS analysis. If corresponding identifier in knownCanonical from UCSC data tables exists, then corresponding isoform is used. If more than one identifier corresponds, the longest annotation is selected. For the rest, longest annotation is selected.

Helper functions

ni_pr_expression_analysis <- function(datadir, alpha = 0.05, shrink = TRUE) {
  counts_file <- file.path(datadir, "rnaseq/Kumar_2020/rsem.merged.gene_counts.tsv")
  c1_columns <- paste("Kumar_2020_Naive", c("R1", "R2", "R3"), sep = "_")
  c2_columns <- paste("Kumar_2020_Primed", c("R1", "R2", "R3"), sep = "_")
  rsem_deseq_analysis(counts_file, c1_columns, c2_columns, "Naive", "Primed", "Naive", alpha, shrink = shrink)
}

ni_ezh2i_expression_analysis <- function(datadir, alpha = 0.05, shrink = TRUE) {
  counts_file <- file.path(datadir, "rnaseq/Kumar_2020/rsem.merged.gene_counts.tsv")
  c1_columns <- paste("Kumar_2020_Naive", c("R1", "R2", "R3"), sep = "_")
  c2_columns <- paste("Kumar_2020_Naive_EZH2i", c("R1", "R2", "R3"), sep = "_")
  rsem_deseq_analysis(counts_file, c1_columns, c2_columns, "Naive", "EZH2i", "Naive", alpha, shrink = shrink)
}

pr_ezh2i_expression_analysis <- function(datadir, alpha = 0.05, shrink = TRUE) {
  counts_file <- file.path(datadir, "rnaseq/Kumar_2020/rsem.merged.gene_counts.tsv")
  c1_columns <- paste("Kumar_2020_Primed", c("R1", "R2", "R3"), sep = "_")
  c2_columns <- paste("Kumar_2020_Primed_EZH2i", c("R1", "R2", "R3"), sep = "_")
  rsem_deseq_analysis(counts_file, c1_columns, c2_columns, "Primed", "EZH2i", "Primed", alpha, shrink = shrink)
}

make_df <- function(diffres, name_suffix) {
  df <- data.frame(diffres)
  colnames(df) <- paste(colnames(df), name_suffix, sep = "_")
  df$gene <- rownames(df)
  df
}

make_label <- function(fnames) {
  labs <- gsub("_pooled.hg38.*scaled.bw", "", basename(fnames))
  # Remove the uncomfortable . in EZH2i elements
  labs <- gsub("-", "_", labs)
  labs <- gsub("H9_", "", labs)
  paste(labs, "mean_cov", sep = "_")
}

merge_by_name <- function(lociset) {
  mcols_df <- function(gr) { data.frame(mcols(gr)) }
  
  dfs <- lapply(lociset, mcols_df)
  dfs %>% reduce(full_join, by = "name")
}

make_diff_df <- function(diff_lfc, prefix) {
  df_diff <- data.frame(diff_lfc)
  # DS stands for DeSeq
  colnames(df_diff) <- paste(prefix, colnames(df_diff), sep = "_")
  df_diff$name <- rownames(df_diff)
  df_diff
}

Config analysis

# genes <- genes_hg38()
genes <- canonical_genes_hg38(file.path(params$datadir, "bed/Kumar_2020/refFlat.txt"),
                              file.path(params$datadir, "bed/Kumar_2020/knownCanonical.txt"))

export(genes, "./data/bed/Kumar_2020/Kumar_2020_genes_hg38_UCSC.bed")

genes_tss_broad <- promoters(genes, upstream = params$tss_wide, downstream = params$tss_wide)
genes_tss_narrow <- promoters(genes, upstream = params$tss_narrow, downstream = params$tss_narrow)

# bwfiles per histone mark
bwdir <- file.path(params$datadir, "bw/Kumar_2020")
bwfiles <-
  list(
    k4_naive = list.files(bwdir, pattern = "H3K4m3_H9_Ni_rep[1-3].hg38.scaled.bw", full.names = T),
    k4_naive_ezh2i = list.files(bwdir, pattern = "H3K4m3_H9_Ni-EZH2i_rep[1-3].hg38.scaled.bw", full.names = T),
    k4_primed = list.files(bwdir, pattern = "H3K4m3_H9_Pr_rep[1-3].hg38.scaled.bw", full.names = T),
    k4_primed_ezh2i = list.files(bwdir, pattern = "H3K4m3_H9_Pr-EZH2i_rep[1-3].hg38.scaled.bw", full.names = T),
    k27_naive = list.files(bwdir, pattern = "H3K27m3_H9_Ni_rep[1-3].hg38.scaled.bw", full.names = T),
    k27_primed = list.files(bwdir, pattern = "H3K27m3_H9_Pr_rep[1-3].hg38.scaled.bw", full.names = T),
    ub_naive = list.files(bwdir, pattern = "H2Aub_H9_Ni_rep[1-3].hg38.scaled.bw", full.names = T),
    ub_naive_ezh2i = list.files(bwdir, pattern = "H2Aub_H9_Ni-EZH2i_rep[1-3].hg38.scaled.bw", full.names = T),
    ub_primed = list.files(bwdir, pattern = "H2Aub_H9_Pr_rep[1-3].hg38.scaled.bw", full.names = T),
    ub_primed_ezh2i = list.files(bwdir, pattern = "H2Aub_H9_Pr-EZH2i_rep[1-3].hg38.scaled.bw", full.names = T),
    in_naive = list.files(bwdir, pattern = "IN_H9_Ni.*rep[1-3].hg38.*.bw", full.names = T),
    in_naive_ezh2i = list.files(bwdir, pattern = "IN_H9_Ni-EZH2i.*rep[1-3].hg38.*.bw", full.names = T),
    in_primed = list.files(bwdir, pattern = "IN_H9_Pr_rep[1-3].hg38.*.bw", full.names = T),
    in_primed_ezh2i = list.files(bwdir, pattern = "IN_H9_Pr-EZH2i.*rep[1-3].hg38.*.bw", full.names = T)
  )

bwfiles_pooled <-
  list(
    k4 = list.files(bwdir, pattern = "H3K4m3.*pooled.hg38.scaled.*", full.names = T),
    k27 = list.files(bwdir, pattern = "H3K27m3.*pooled.hg38.scaled.*", full.names = T),
    ub = list.files(bwdir, pattern = "H2Aub.*pooled.hg38.scaled.*", full.names = T),
    input = list.files(bwdir, pattern = "IN.*pooled.hg38.*", full.names = T)
  )

sorted_colors <- unname(c(gl_condition_colors["Naive_Untreated"],
                        gl_condition_colors["Naive_EZH2i"],
                        gl_condition_colors["Primed_Untreated"],
                        gl_condition_colors["Primed_EZH2i"]))

grey_colors <- c("#cccccc", "#aaaaaa", "#888888", "#555555")

Raw pooled values at TSS per gene

At this point kept area around TSS the same size even though K4 is narrower, so it’s fairer to put them all in the same table.

pooled_k4 <- bw_loci(bwfiles_pooled$k4, genes_tss_broad, labels = make_label(bwfiles_pooled$k4))
pooled_k27 <- bw_loci(bwfiles_pooled$k27, genes_tss_broad, labels = make_label(bwfiles_pooled$k27))
pooled_h2aub <- bw_loci(bwfiles_pooled$ub, genes_tss_broad, labels = make_label(bwfiles_pooled$ub))
pooled_inp <- bw_loci(bwfiles_pooled$input, genes_tss_broad, labels = make_label(bwfiles_pooled$input))

pooled_df <- merge_by_name(list(pooled_k4, pooled_k27, pooled_h2aub, pooled_inp))
master_df <- pooled_df

K27m3 diff analysis

Primed vs Naive

c1 <- bw_loci(bwfiles$k27_naive, genes_tss_broad)
c2 <- bw_loci(bwfiles$k27_primed, genes_tss_broad)

diff <- bw_granges_diff_analysis(c1, c2, "Naive", "Primed", estimate_size_factors = FALSE)

if (params$shrink_histones == TRUE) {
  diff_lfc <- lfcShrink(diff, coef="condition_Primed_vs_Naive", type="apeglm")
  diff <- diff_lfc
} else {
  diff <- results(diff, alpha = params$pval_cutoff)
}

plotMA(diff)

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df_diff <- make_diff_df(diff, "H3K27m3_DS_Pr_vs_Ni")
master_df <- left_join(master_df, df_diff, by = "name")

H3K4m3 diff analysis

Primed vs Naive

c1 <- bw_loci(bwfiles$k4_naive, genes_tss_narrow)
c2 <- bw_loci(bwfiles$k4_primed, genes_tss_narrow)

diff <- bw_granges_diff_analysis(c1, c2, "Naive", "Primed", estimate_size_factors = FALSE)

if (params$shrink_histones == TRUE) {
  diff_lfc <- lfcShrink(diff, coef="condition_Primed_vs_Naive", type="apeglm")
  diff <- diff_lfc
} else {
  diff <- results(diff, alpha = params$pval_cutoff)
}

plotMA(diff)

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df_diff <- make_diff_df(diff, "H3K4m3_DS_Pr_vs_Ni")
master_df <- left_join(master_df, df_diff, by = "name")

EZH2i vs Naive

c1 <- bw_loci(bwfiles$k4_naive, genes_tss_narrow)
c2 <- bw_loci(bwfiles$k4_naive_ezh2i, genes_tss_narrow)

diff <- bw_granges_diff_analysis(c1, c2, "Naive", "EZH2i", estimate_size_factors = FALSE)

if (params$shrink_histones == TRUE) {
  diff_lfc <- lfcShrink(diff, coef="condition_EZH2i_vs_Naive", type="apeglm")
  diff <- diff_lfc
} else {
  diff <- results(diff, alpha = params$pval_cutoff)
}

plotMA(diff)

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# 
df_diff <- make_diff_df(diff, "H3K4m3_DS_EZH2i_vs_Ni")
master_df <- left_join(master_df, df_diff, by = "name")

EZH2i vs Primed

c1 <- bw_loci(bwfiles$k4_primed, genes_tss_narrow)
c2 <- bw_loci(bwfiles$k4_primed_ezh2i, genes_tss_narrow)

diff <- bw_granges_diff_analysis(c1, c2, "Primed", "EZH2i", estimate_size_factors = FALSE)
if (params$shrink_histones == TRUE) {
  diff_lfc <- lfcShrink(diff, coef="condition_EZH2i_vs_Primed", type="apeglm")
  diff <- diff_lfc
} else {
  diff <- results(diff, alpha = params$pval_cutoff)
}

plotMA(diff)

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# 
df_diff <- make_diff_df(diff, "H3K4m3_DS_EZH2i_vs_Pr")
master_df <- left_join(master_df, df_diff, by = "name")

H2AUb diff analysis

Primed vs Naive

c1 <- bw_loci(bwfiles$ub_naive, genes_tss_broad)
c2 <- bw_loci(bwfiles$ub_primed, genes_tss_broad)

diff <- bw_granges_diff_analysis(c1, c2, "Naive", "Primed", estimate_size_factors = FALSE)

if (params$shrink_histones == TRUE) {
  diff_lfc <- lfcShrink(diff, coef="condition_Primed_vs_Naive", type="apeglm")
  diff <- diff_lfc
} else {
  diff <- results(diff, alpha = params$pval_cutoff)
}

plotMA(diff)

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df_diff <- make_diff_df(diff, "H2Aub_DS_Pr_vs_Ni")
master_df <- left_join(master_df, df_diff, by = "name")

EZH2i vs Naive

c1 <- bw_loci(bwfiles$ub_naive, genes_tss_broad)
c2 <- bw_loci(bwfiles$ub_naive_ezh2i, genes_tss_broad)

diff <- bw_granges_diff_analysis(c1, c2, "Naive", "EZH2i", estimate_size_factors = FALSE)
if (params$shrink_histones == TRUE) {
  diff_lfc <- lfcShrink(diff, coef="condition_EZH2i_vs_Naive", type="apeglm")
  diff <- diff_lfc
} else {
  diff <- results(diff, alpha = params$pval_cutoff)
}

plotMA(diff)

Version Author Date
58564ac cnluzon 2021-05-26
df_diff <- make_diff_df(diff, "H2Aub_DS_EZH2i_vs_Ni")
master_df <- left_join(master_df, df_diff, by = "name")

EZH2i vs Primed

c1 <- bw_loci(bwfiles$ub_primed, genes_tss_broad)
c2 <- bw_loci(bwfiles$ub_primed_ezh2i, genes_tss_broad)

diff <- bw_granges_diff_analysis(c1, c2, "Primed", "EZH2i", estimate_size_factors = FALSE)
if (params$shrink_histones == TRUE) {
  diff_lfc <- lfcShrink(diff, coef="condition_EZH2i_vs_Primed", type="apeglm")
  diff <- diff_lfc
} else {
  diff <- results(diff, alpha = params$pval_cutoff)
}

plotMA(diff)

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df_diff <- make_diff_df(diff, "H2Aub_DS_EZH2i_vs_Pr")
master_df <- left_join(master_df, df_diff, by = "name")

RNA-seq diff analysis

Primed vs Naive

ni_pr_diff <- ni_pr_expression_analysis(params$datadir, alpha = params$pval_cutoff, shrink = params$shrink_rnaseq)
plotMA(ni_pr_diff)

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EZH2i vs Naive

ni_ezh2i_diff <- ni_ezh2i_expression_analysis(params$datadir, alpha = params$pval_cutoff, shrink = params$shrink_rnaseq)
plotMA(ni_ezh2i_diff)

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EZH2i vs Primed

pr_ezh2i_diff <- pr_ezh2i_expression_analysis(params$datadir, alpha = params$pval_cutoff, shrink = params$shrink_rnaseq)
plotMA(pr_ezh2i_diff)

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Expression table

counts_file <- file.path(params$datadir, "rnaseq/Kumar_2020/rsem.merged.gene_tpm.tsv")
tpm_counts <- read.table(counts_file, sep = "\t", header = TRUE)

columns <- colnames(tpm_counts)[!colnames(tpm_counts) %in% c("transcript_id.s.")]
tpm_counts <- tpm_counts[, columns]

new_values <- paste("RNASeq_TPM",
                    gsub("Kumar_2020_", "", columns[2:length(columns)]), sep = "_")
new_values <- gsub("Naive", "Ni", new_values)
new_values <- gsub("Primed", "Pr", new_values)
new_columns <- c("name", new_values)

colnames(tpm_counts) <- new_columns

make_df <- function(diffres, name_suffix) {
  df <- data.frame(diffres)
  colnames(df) <- paste(colnames(df), name_suffix, sep = "_")
  df$gene <- rownames(df)
  df
}

dfs <- list(make_diff_df(ni_pr_diff, "RNASeq_DS_Pr_vs_Ni"),
            make_diff_df(ni_ezh2i_diff, "RNASeq_DS_EZH2i_vs_Ni"),
            make_diff_df(pr_ezh2i_diff, "RNASeq_DS_EZH2i_vs_Pr"),
            tpm_counts)

expr_results_all <- reduce(dfs, full_join, by = "name")

Final table

final <- full_join(master_df, expr_results_all, by = "name")
# Add TSS broad coords
loci <- data.frame(genes_tss_broad)
final <- full_join(final, loci, by = "name")

columns <- colnames(final)
order <-
  c(c("name", "seqnames", "start", "end", "strand"),
    sort(columns[!(columns %in% c("name", "seqnames", "start", "end", "strand"))]))

filename <- "./data/meta/Kumar_2020_master_gene_table"
if (params$shrink_rnaseq == TRUE) {
  filename <- paste(filename, "rnaseq_shrunk", sep = "_")
}
if (params$shrink_histones == TRUE) {
  filename <- paste(filename, "hist_shrunk", sep = "_")
}
filename <- paste0(filename, ".tsv")

write.table(
  format(final[, order], digits = 4),
  file = filename,
  sep = "\t",
  col.names = T,
  quote = F,
  row.names = F
)

sessionInfo()
R version 4.1.0 (2021-05-18)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: Ubuntu 20.04.2 LTS

Matrix products: default
BLAS:   /usr/lib/x86_64-linux-gnu/openblas-pthread/libblas.so.3
LAPACK: /usr/lib/x86_64-linux-gnu/openblas-pthread/liblapack.so.3

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C              
 [3] LC_TIME=sv_SE.UTF-8        LC_COLLATE=en_US.UTF-8    
 [5] LC_MONETARY=sv_SE.UTF-8    LC_MESSAGES=en_US.UTF-8   
 [7] LC_PAPER=sv_SE.UTF-8       LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C            
[11] LC_MEASUREMENT=sv_SE.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] stats4    parallel  stats     graphics  grDevices utils     datasets 
[8] methods   base     

other attached packages:
 [1] biomaRt_2.48.1                          
 [2] DESeq2_1.32.0                           
 [3] SummarizedExperiment_1.22.0             
 [4] MatrixGenerics_1.4.0                    
 [5] matrixStats_0.59.0                      
 [6] tidyr_1.1.3                             
 [7] cowplot_1.1.1                           
 [8] xfun_0.24                               
 [9] dplyr_1.0.7                             
[10] purrr_0.3.4                             
[11] rtracklayer_1.52.0                      
[12] org.Hs.eg.db_3.13.0                     
[13] TxDb.Hsapiens.UCSC.hg38.knownGene_3.13.0
[14] GenomicFeatures_1.44.0                  
[15] AnnotationDbi_1.54.1                    
[16] Biobase_2.52.0                          
[17] GenomicRanges_1.44.0                    
[18] GenomeInfoDb_1.28.0                     
[19] IRanges_2.26.0                          
[20] S4Vectors_0.30.0                        
[21] BiocGenerics_0.38.0                     
[22] knitr_1.33                              
[23] ggplot2_3.3.5                           
[24] wigglescout_0.13.1                      
[25] workflowr_1.6.2                         

loaded via a namespace (and not attached):
  [1] colorspace_2.0-2         rjson_0.2.20             ellipsis_0.3.2          
  [4] rprojroot_2.0.2          XVector_0.32.0           fs_1.5.0                
  [7] listenv_0.8.0            furrr_0.2.3              bit64_4.0.5             
 [10] mvtnorm_1.1-2            apeglm_1.14.0            fansi_0.5.0             
 [13] xml2_1.3.2               splines_4.1.0            codetools_0.2-18        
 [16] cachem_1.0.5             geneplotter_1.70.0       jsonlite_1.7.2          
 [19] Rsamtools_2.8.0          annotate_1.70.0          dbplyr_2.1.1            
 [22] png_0.1-7                compiler_4.1.0           httr_1.4.2              
 [25] assertthat_0.2.1         Matrix_1.3-4             fastmap_1.1.0           
 [28] later_1.2.0              htmltools_0.5.1.1        prettyunits_1.1.1       
 [31] tools_4.1.0              coda_0.19-4              gtable_0.3.0            
 [34] glue_1.4.2               GenomeInfoDbData_1.2.6   reshape2_1.4.4          
 [37] rappdirs_0.3.3           Rcpp_1.0.6               bbmle_1.0.23.1          
 [40] jquerylib_0.1.4          vctrs_0.3.8              Biostrings_2.60.1       
 [43] stringr_1.4.0            globals_0.14.0           lifecycle_1.0.0         
 [46] restfulr_0.0.13          XML_3.99-0.6             future_1.21.0           
 [49] MASS_7.3-54              zlibbioc_1.38.0          scales_1.1.1            
 [52] hms_1.1.0                promises_1.2.0.1         RColorBrewer_1.1-2      
 [55] yaml_2.2.1               curl_4.3.2               memoise_2.0.0           
 [58] emdbook_1.3.12           sass_0.4.0               bdsmatrix_1.3-4         
 [61] stringi_1.6.2            RSQLite_2.2.7            highr_0.9               
 [64] genefilter_1.74.0        BiocIO_1.2.0             filelock_1.0.2          
 [67] BiocParallel_1.26.0      rlang_0.4.11             pkgconfig_2.0.3         
 [70] bitops_1.0-7             evaluate_0.14            lattice_0.20-44         
 [73] GenomicAlignments_1.28.0 bit_4.0.4                tidyselect_1.1.1        
 [76] parallelly_1.26.1        plyr_1.8.6               magrittr_2.0.1          
 [79] R6_2.5.0                 generics_0.1.0           DelayedArray_0.18.0     
 [82] DBI_1.1.1                pillar_1.6.1             whisker_0.4             
 [85] withr_2.4.2              survival_3.2-11          KEGGREST_1.32.0         
 [88] RCurl_1.98-1.3           tibble_3.1.2             crayon_1.4.1            
 [91] utf8_1.2.1               BiocFileCache_2.0.0      rmarkdown_2.9           
 [94] progress_1.2.2           locfit_1.5-9.4           grid_4.1.0              
 [97] blob_1.2.1               git2r_0.28.0             digest_0.6.27           
[100] xtable_1.8-4             numDeriv_2016.8-1.1      httpuv_1.6.1            
[103] munsell_0.5.0            bslib_0.2.5.1